$NSP
INSPERITY, INC.

2024 Q1 Form 10-K Financial Statement

#000100075324000012 Filed on February 09, 2024

View on sec.gov

Income Statement

Concept 2024 Q1 2023 Q4 2023
Revenue $1.802B $1.580B $6.486B
YoY Change 1.83% 6.07% 9.21%
Cost Of Revenue $1.457B $1.358B $5.449B
YoY Change 1.36% 8.76% 10.58%
Gross Profit $345.0M $222.1M $1.037B
YoY Change 3.87% -7.86% 2.53%
Gross Profit Margin 19.15% 14.05% 15.99%
Selling, General & Admin $226.0M $189.0M $775.5M
YoY Change 12.64% 5.07% 7.66%
% of Gross Profit 65.51% 85.11% 74.8%
Research & Development
YoY Change
% of Gross Profit
Depreciation & Amortization $11.00M $10.81M $42.71M
YoY Change 4.79% 4.97% 5.04%
% of Gross Profit 3.19% 4.87% 4.12%
Operating Expenses $237.0M $199.8M $818.3M
YoY Change 12.25% 5.07% 7.52%
Operating Profit $108.0M $22.27M $218.5M
YoY Change -10.75% -56.21% -12.66%
Interest Expense $3.000M $1.775M $27.14M
YoY Change -51.65% -10541.18% 91.01%
% of Operating Profit 2.78% 7.97% 12.42%
Other Income/Expense, Net
YoY Change
Pretax Income $111.0M $24.05M $225.1M
YoY Change -10.18% -52.71% -8.29%
Income Tax $32.00M $4.485M $53.70M
% Of Pretax Income 28.83% 18.65% 23.86%
Net Earnings $79.00M $19.56M $171.4M
YoY Change -16.49% -48.83% -4.44%
Net Earnings / Revenue 4.38% 1.24% 2.64%
Basic Earnings Per Share $2.11 $4.53
Diluted Earnings Per Share $2.08 $0.52 $4.47
COMMON SHARES
Basic Shares Outstanding 37.29M shares 37.28M shares 37.81M shares
Diluted Shares Outstanding 38.00M shares 38.34M shares

Balance Sheet

Concept 2024 Q1 2023 Q4 2023
SHORT-TERM ASSETS
Cash & Short-Term Investments $683.0M $708.8M $708.8M
YoY Change -6.71% -7.46% -7.46%
Cash & Equivalents $667.0M $692.9M $692.9M
Short-Term Investments $16.00M $15.91M $15.91M
Other Short-Term Assets $212.0M $128.2M $192.6M
YoY Change 165.46% 107.72% 56.34%
Inventory
Prepaid Expenses
Receivables $724.0M $15.77M $693.9M
Other Receivables $0.00 $0.00 $0.00
Total Short-Term Assets $1.619B $1.595B $1.595B
YoY Change 6.65% 5.52% 5.52%
LONG-TERM ASSETS
Property, Plant & Equipment $247.0M $197.4M $254.9M
YoY Change 25.78% -1.28% -0.65%
Goodwill
YoY Change
Intangibles
YoY Change
Long-Term Investments
YoY Change
Other Assets $247.0M $21.38M $256.8M
YoY Change 687.1% -27.16% -0.53%
Total Long-Term Assets $507.0M $524.4M $524.4M
YoY Change -2.85% -0.57% -0.57%
TOTAL ASSETS
Total Short-Term Assets $1.619B $1.595B $1.595B
Total Long-Term Assets $507.0M $524.4M $524.4M
Total Assets $2.126B $2.120B $2.120B
YoY Change 4.22% 3.94% 3.94%
SHORT-TERM LIABILITIES
YoY Change
Accounts Payable $6.000M $10.69M $10.69M
YoY Change -36.78% 38.3% 38.3%
Accrued Expenses $1.385B $128.8M $1.426B
YoY Change 1635.74% 60.76% 5.94%
Deferred Revenue
YoY Change
Short-Term Debt $0.00 $0.00 $0.00
YoY Change
Long-Term Debt Due
YoY Change
Total Short-Term Liabilities $1.406B $1.436B $1.436B
YoY Change 7.91% 6.13% 6.13%
LONG-TERM LIABILITIES
Long-Term Debt $369.0M $369.4M $369.4M
YoY Change -0.11% 0.0% 0.0%
Other Long-Term Liabilities $211.0M $220.3M $220.3M
YoY Change -9.44% -6.32% -6.32%
Total Long-Term Liabilities $580.0M $589.7M $589.7M
YoY Change -3.91% -2.46% -2.46%
TOTAL LIABILITIES
Total Short-Term Liabilities $1.406B $1.436B $1.436B
Total Long-Term Liabilities $580.0M $589.7M $589.7M
Total Liabilities $1.986B $2.026B $2.026B
YoY Change 4.17% 3.48% 3.48%
SHAREHOLDERS EQUITY
Retained Earnings $793.0M $738.6M
YoY Change 9.21% 12.72%
Common Stock $173.0M $185.6M
YoY Change 21.35% 22.34%
Preferred Stock
YoY Change
Treasury Stock (at cost) $826.0M $830.5M
YoY Change 12.35% 14.47%
Treasury Stock Shares
Shareholders Equity $140.0M $93.62M $93.62M
YoY Change
Total Liabilities & Shareholders Equity $2.126B $2.120B $2.120B
YoY Change 4.22% 3.94% 3.94%

Cashflow Statement

Concept 2024 Q1 2023 Q4 2023
OPERATING ACTIVITIES
Net Income $79.00M $19.56M $171.4M
YoY Change -16.49% -48.83% -4.44%
Depreciation, Depletion And Amortization $11.00M $10.81M $42.71M
YoY Change 4.79% 4.97% 5.04%
Cash From Operating Activities $31.00M $58.19M $198.5M
YoY Change -21.22% -74.21% -42.91%
INVESTING ACTIVITIES
Capital Expenditures $5.000M $17.62M $40.12M
YoY Change -27.0% 26.91% 32.27%
Acquisitions
YoY Change
Other Investing Activities $0.00 -$1.813M $18.39M
YoY Change -100.0% -212.61% -1125.49%
Cash From Investing Activities -$5.000M -$19.43M -$21.73M
YoY Change -44.1% 58.34% -32.35%
FINANCING ACTIVITIES
Cash Dividend Paid
YoY Change
Common Stock Issuance & Retirement, Net $131.5M
YoY Change
Debt Paid & Issued, Net
YoY Change
Cash From Financing Activities -83.00M 39.79M -$155.0M
YoY Change 77.17% -324.36% 9.82%
NET CHANGE
Cash From Operating Activities 31.00M 58.19M $198.5M
Cash From Investing Activities -5.000M -19.43M -$21.73M
Cash From Financing Activities -83.00M 39.79M -$155.0M
Net Change In Cash -57.00M 78.55M $21.75M
YoY Change 246.72% -59.86% -87.53%
FREE CASH FLOW
Cash From Operating Activities $31.00M $58.19M $198.5M
Capital Expenditures $5.000M $17.62M $40.12M
Free Cash Flow $26.00M $40.57M $158.4M
YoY Change -20.01% -80.84% -50.1%

Facts In Submission

Frame Concept Type Concept / XBRL Key Value Unit
CY2023 dei Document Fiscal Year Focus
DocumentFiscalYearFocus
2023
CY2023 dei Document Fiscal Year Focus
DocumentFiscalYearFocus
2023
CY2023 dei Document Fiscal Year Focus
DocumentFiscalYearFocus
2023
CY2023 dei Document Fiscal Year Focus
DocumentFiscalYearFocus
2023
CY2023 dei Document Fiscal Year Focus
DocumentFiscalYearFocus
2023
CY2023 dei Document Fiscal Year Focus
DocumentFiscalYearFocus
2023
CY2023 dei Document Fiscal Year Focus
DocumentFiscalYearFocus
2023
CY2023 dei Document Fiscal Year Focus
DocumentFiscalYearFocus
2023
CY2023 dei Document Fiscal Year Focus
DocumentFiscalYearFocus
2023
CY2023 dei Document Fiscal Year Focus
DocumentFiscalYearFocus
2023
CY2023 dei Document Fiscal Year Focus
DocumentFiscalYearFocus
2023
CY2023 dei Document Fiscal Year Focus
DocumentFiscalYearFocus
2023
CY2023 dei Document Fiscal Year Focus
DocumentFiscalYearFocus
2023
CY2023 nsp Time Period Incurred Claims Expected To Be Paid Included In Deposits
TimePeriodIncurredClaimsExpectedToBePaidIncludedInDeposits
Greater than 1 year
CY2023 nsp Time Period Estimate Of Incurred Claim Costs To Be Paid Included In Long Term Liabilities
TimePeriodEstimateOfIncurredClaimCostsToBePaidIncludedInLongTermLiabilities
Greater than 1 year
CY2023 nsp Time Period Estimate Of Incurred Claim Costs To Be Paid Included In Short Term Liabilities
TimePeriodEstimateOfIncurredClaimCostsToBePaidIncludedInShortTermLiabilities
P1Y
CY2023 nsp Time Period Incurred Claims Expected To Be Paid Recorded As Restricted
TimePeriodIncurredClaimsExpectedToBePaidRecordedAsRestricted
P1Y
CY2023Q4 us-gaap Operating Lease Liability Current Statement Of Financial Position Extensible List
OperatingLeaseLiabilityCurrentStatementOfFinancialPositionExtensibleList
http://fasb.org/us-gaap/2023#AccruedLiabilitiesCurrent
CY2023 dei Document Fiscal Year Focus
DocumentFiscalYearFocus
2023
CY2023 dei Document Annual Report
DocumentAnnualReport
true
CY2023 dei Entity Well Known Seasoned Issuer
EntityWellKnownSeasonedIssuer
Yes
CY2023 dei Entity Voluntary Filers
EntityVoluntaryFilers
No
CY2023 dei Entity Current Reporting Status
EntityCurrentReportingStatus
Yes
CY2023 dei Entity Interactive Data Current
EntityInteractiveDataCurrent
Yes
CY2023 dei Entity Filer Category
EntityFilerCategory
Large Accelerated Filer
CY2023 dei Entity Emerging Growth Company
EntityEmergingGrowthCompany
false
CY2023 dei Entity Small Business
EntitySmallBusiness
false
CY2023 dei Entity Small Business
EntitySmallBusiness
false
CY2023 dei Icfr Auditor Attestation Flag
IcfrAuditorAttestationFlag
true
CY2023 dei Document Fin Stmt Error Correction Flag
DocumentFinStmtErrorCorrectionFlag
false
CY2023 dei Entity Shell Company
EntityShellCompany
false
CY2024Q1 dei Entity Common Stock Shares Outstanding
EntityCommonStockSharesOutstanding
37289427 shares
CY2023Q2 dei Entity Public Float
EntityPublicFloat
4300000000 usd
CY2023 dei Document Fiscal Year Focus
DocumentFiscalYearFocus
2023
CY2023 dei Document Type
DocumentType
10-K
CY2023 dei Document Fiscal Year Focus
DocumentFiscalYearFocus
2023
CY2023 dei Document Fiscal Year Focus
DocumentFiscalYearFocus
2023
CY2023 dei Document Type
DocumentType
10-K
CY2023 dei Document Fiscal Year Focus
DocumentFiscalYearFocus
2023
CY2023 dei Document Type
DocumentType
10-K
CY2023 dei Document Fiscal Year Focus
DocumentFiscalYearFocus
2023
CY2023 dei Document Type
DocumentType
10-K
CY2023 dei Document Fiscal Year Focus
DocumentFiscalYearFocus
2023
CY2023 dei Document Type
DocumentType
10-K
CY2023 dei Document Fiscal Year Focus
DocumentFiscalYearFocus
2023
CY2023 dei Document Type
DocumentType
10-K
CY2023 dei Document Fiscal Year Focus
DocumentFiscalYearFocus
2023
CY2023 dei Document Fiscal Year Focus
DocumentFiscalYearFocus
2023
CY2023 dei Document Fiscal Year Focus
DocumentFiscalYearFocus
2023
CY2023 dei Document Fiscal Year Focus
DocumentFiscalYearFocus
2023
CY2023 dei Document Fiscal Year Focus
DocumentFiscalYearFocus
2023
CY2023 dei Document Type
DocumentType
10-K
CY2023 dei Document Fiscal Year Focus
DocumentFiscalYearFocus
2023
CY2023 dei Document Type
DocumentType
10-K
CY2023 dei Document Fiscal Year Focus
DocumentFiscalYearFocus
2023
CY2023 dei Document Type
DocumentType
10-K
CY2023 dei Document Fiscal Year Focus
DocumentFiscalYearFocus
2023
CY2023 dei Document Type
DocumentType
10-K
CY2023 dei Document Fiscal Year Focus
DocumentFiscalYearFocus
2023
CY2023 dei Document Fiscal Year Focus
DocumentFiscalYearFocus
2023
CY2023 dei Document Type
DocumentType
10-K
CY2023 dei Document Fiscal Year Focus
DocumentFiscalYearFocus
2023
CY2023 dei Document Type
DocumentType
10-K
CY2023Q4 nsp Percentageofourhealthinsurancecoverageprovidedby United
PercentageofourhealthinsurancecoverageprovidedbyUnited
0.87
CY2023 dei Document Fiscal Year Focus
DocumentFiscalYearFocus
2023
CY2023 dei Document Type
DocumentType
10-K
CY2023 dei Document Fiscal Year Focus
DocumentFiscalYearFocus
2023
CY2023 dei Document Type
DocumentType
10-K
CY2023 dei Document Fiscal Year Focus
DocumentFiscalYearFocus
2023
CY2023 dei Document Type
DocumentType
10-K
CY2023 dei Document Fiscal Year Focus
DocumentFiscalYearFocus
2023
CY2023 dei Document Fiscal Year Focus
DocumentFiscalYearFocus
2023
CY2023 dei Document Type
DocumentType
10-K
CY2023 dei Document Fiscal Year Focus
DocumentFiscalYearFocus
2023
CY2023 dei Document Type
DocumentType
10-K
CY2023 dei Document Fiscal Year Focus
DocumentFiscalYearFocus
2023
CY2023 dei Document Type
DocumentType
10-K
CY2023 dei Document Fiscal Year Focus
DocumentFiscalYearFocus
2023
CY2023 dei Document Type
DocumentType
10-K
CY2023 dei Document Fiscal Year Focus
DocumentFiscalYearFocus
2023
CY2023 dei Document Type
DocumentType
10-K
CY2023 dei Document Fiscal Year Focus
DocumentFiscalYearFocus
2023
CY2023 dei Document Type
DocumentType
10-K
CY2023 dei Document Fiscal Year Focus
DocumentFiscalYearFocus
2023
CY2023 dei Document Type
DocumentType
10-K
CY2023 dei Document Fiscal Year Focus
DocumentFiscalYearFocus
2023
CY2023 dei Document Fiscal Year Focus
DocumentFiscalYearFocus
2023
CY2023 dei Document Fiscal Year Focus
DocumentFiscalYearFocus
2023
CY2023 dei Document Type
DocumentType
10-K
CY2023 dei Document Fiscal Year Focus
DocumentFiscalYearFocus
2023
CY2023 dei Document Type
DocumentType
10-K
CY2023 dei Document Fiscal Year Focus
DocumentFiscalYearFocus
2023
CY2023 dei Document Type
DocumentType
10-K
CY2023 dei Document Fiscal Year Focus
DocumentFiscalYearFocus
2023
CY2023 dei Document Fiscal Year Focus
DocumentFiscalYearFocus
2023
CY2023 dei Document Type
DocumentType
10-K
CY2023 dei Document Fiscal Year Focus
DocumentFiscalYearFocus
2023
CY2023 dei Document Type
DocumentType
10-K
CY2023 dei Document Fiscal Year Focus
DocumentFiscalYearFocus
2023
CY2023 dei Document Type
DocumentType
10-K
CY2023 dei Document Fiscal Year Focus
DocumentFiscalYearFocus
2023
CY2023 dei Document Type
DocumentType
10-K
CY2023 dei Document Type
DocumentType
10-K
CY2023 dei Document Type
DocumentType
10-K
CY2023 dei Document Fiscal Year Focus
DocumentFiscalYearFocus
2023
CY2023 dei Document Type
DocumentType
10-K
CY2023 dei Document Fiscal Year Focus
DocumentFiscalYearFocus
2023
CY2023 dei Document Type
DocumentType
10-K
CY2023 dei Document Fiscal Year Focus
DocumentFiscalYearFocus
2023
CY2023 dei Document Type
DocumentType
10-K
CY2023 dei Document Fiscal Year Focus
DocumentFiscalYearFocus
2023
CY2023 dei Document Type
DocumentType
10-K
CY2023 dei Document Fiscal Year Focus
DocumentFiscalYearFocus
2023
CY2023 dei Document Type
DocumentType
10-K
CY2023 dei Document Fiscal Year Focus
DocumentFiscalYearFocus
2023
CY2023 dei Document Type
DocumentType
10-K
CY2023 dei Document Fiscal Year Focus
DocumentFiscalYearFocus
2023
CY2023 dei Document Type
DocumentType
10-K
CY2023 us-gaap Effective Income Tax Rate Reconciliation At Federal Statutory Income Tax Rate
EffectiveIncomeTaxRateReconciliationAtFederalStatutoryIncomeTaxRate
0.21
CY2023 dei Document Fiscal Year Focus
DocumentFiscalYearFocus
2023
CY2023 dei Document Type
DocumentType
10-K
CY2023 dei Document Fiscal Year Focus
DocumentFiscalYearFocus
2023
CY2023 dei Document Type
DocumentType
10-K
CY2023 dei Document Fiscal Year Focus
DocumentFiscalYearFocus
2023
CY2023 dei Document Fiscal Year Focus
DocumentFiscalYearFocus
2023
CY2023 dei Document Fiscal Year Focus
DocumentFiscalYearFocus
2023
CY2023 dei Document Fiscal Year Focus
DocumentFiscalYearFocus
2023
CY2023 dei Document Fiscal Year Focus
DocumentFiscalYearFocus
2023
CY2023 dei Document Type
DocumentType
10-K
CY2023 dei Document Fiscal Year Focus
DocumentFiscalYearFocus
2023
CY2023 dei Document Fiscal Year Focus
DocumentFiscalYearFocus
2023
CY2023 dei Document Fiscal Year Focus
DocumentFiscalYearFocus
2023
CY2023 dei Document Fiscal Year Focus
DocumentFiscalYearFocus
2023
CY2023 dei Document Type
DocumentType
10-K
CY2023 dei Document Fiscal Year Focus
DocumentFiscalYearFocus
2023
CY2023 dei Document Type
DocumentType
10-K
CY2023 dei Document Fiscal Year Focus
DocumentFiscalYearFocus
2023
CY2023 dei Document Type
DocumentType
10-K
CY2023 nsp Decrease Increase In Accrued Workers Compensation Costs For Changes In Estimated Losses
DecreaseIncreaseInAccruedWorkersCompensationCostsForChangesInEstimatedLosses
-33500000 usd
CY2022Q4 nsp Benefits Costs Incurred Reduced Relatedto Runoff
BenefitsCostsIncurredReducedRelatedtoRunoff
12100000 usd
CY2022 nsp Us Treasury Rates That Correspond With Weighted Average Estimated Claim Payout Period
USTreasuryRatesThatCorrespondWithWeightedAverageEstimatedClaimPayoutPeriod
0.029
CY2023 dei Document Fiscal Year Focus
DocumentFiscalYearFocus
2023
CY2023 dei Document Type
DocumentType
10-K
CY2023 dei Document Fiscal Year Focus
DocumentFiscalYearFocus
2023
CY2023 dei Document Type
DocumentType
10-K
CY2023 dei Document Fiscal Year Focus
DocumentFiscalYearFocus
2023
CY2023 dei Document Fiscal Year Focus
DocumentFiscalYearFocus
2023
CY2023 dei Document Fiscal Year Focus
DocumentFiscalYearFocus
2023
CY2023 dei Document Fiscal Year Focus
DocumentFiscalYearFocus
2023
CY2023 dei Document Type
DocumentType
10-K
CY2023 dei Document Fiscal Year Focus
DocumentFiscalYearFocus
2023
CY2023 dei Document Fiscal Year Focus
DocumentFiscalYearFocus
2023
CY2023 dei Document Type
DocumentType
10-K
CY2023 dei Document Fiscal Year Focus
DocumentFiscalYearFocus
2023
CY2023 dei Document Fiscal Year Focus
DocumentFiscalYearFocus
2023
CY2023 dei Document Fiscal Year Focus
DocumentFiscalYearFocus
2023
CY2023 dei Document Type
DocumentType
10-K
CY2023 dei Document Fiscal Year Focus
DocumentFiscalYearFocus
2023
CY2023 nsp Return Of Excess Claim Funds
ReturnOfExcessClaimFunds
46300000 usd
CY2023 dei Document Fiscal Year Focus
DocumentFiscalYearFocus
2023
CY2023 dei Document Type
DocumentType
10-K
CY2023 dei Document Fiscal Year Focus
DocumentFiscalYearFocus
2023
CY2023 dei Document Type
DocumentType
10-K
CY2023 dei Document Type
DocumentType
10-K
CY2023 dei Document Fiscal Year Focus
DocumentFiscalYearFocus
2023
CY2023 dei Document Fiscal Year Focus
DocumentFiscalYearFocus
2023
CY2023 dei Document Type
DocumentType
10-K
CY2023 dei Document Fiscal Year Focus
DocumentFiscalYearFocus
2023
CY2023 dei Document Type
DocumentType
10-K
CY2023 dei Document Fiscal Year Focus
DocumentFiscalYearFocus
2023
CY2023 dei Document Type
DocumentType
10-K
CY2023 dei Document Fiscal Year Focus
DocumentFiscalYearFocus
2023
CY2023 dei Document Type
DocumentType
10-K
CY2023 dei Document Type
DocumentType
10-K
CY2023 dei Document Fiscal Year Focus
DocumentFiscalYearFocus
2023
CY2023 dei Document Type
DocumentType
10-K
CY2023 dei Document Fiscal Year Focus
DocumentFiscalYearFocus
2023
CY2023 dei Document Type
DocumentType
10-K
CY2023 dei Auditor Firm
AuditorFirmId
42
CY2023 dei Document Fiscal Year Focus
DocumentFiscalYearFocus
2023
CY2023 dei Document Type
DocumentType
10-K
CY2023 dei Document Fiscal Year Focus
DocumentFiscalYearFocus
2023
CY2023 dei Document Fiscal Year Focus
DocumentFiscalYearFocus
2023
CY2023 dei Document Fiscal Year Focus
DocumentFiscalYearFocus
2023
CY2023 dei Document Fiscal Year Focus
DocumentFiscalYearFocus
2023
CY2023 dei Document Fiscal Year Focus
DocumentFiscalYearFocus
2023
CY2023 dei Auditor Name
AuditorName
Ernst & Young LLP
CY2023 dei Auditor Location
AuditorLocation
Houston, Texas
CY2023 dei Document Fiscal Year Focus
DocumentFiscalYearFocus
2023
CY2023 dei Document Type
DocumentType
10-K
CY2023 dei Document Fiscal Year Focus
DocumentFiscalYearFocus
2023
CY2023 dei Document Type
DocumentType
10-K
CY2023 dei Document Fiscal Year Focus
DocumentFiscalYearFocus
2023
CY2023 dei Document Fiscal Year Focus
DocumentFiscalYearFocus
2023
CY2023 dei Document Fiscal Year Focus
DocumentFiscalYearFocus
2023
CY2023 dei Document Fiscal Year Focus
DocumentFiscalYearFocus
2023
CY2023 dei Document Fiscal Year Focus
DocumentFiscalYearFocus
2023
CY2023 dei Document Type
DocumentType
10-K
CY2023Q4 us-gaap Cash And Cash Equivalents At Carrying Value
CashAndCashEquivalentsAtCarryingValue
692873000 usd
CY2022Q4 us-gaap Cash And Cash Equivalents At Carrying Value
CashAndCashEquivalentsAtCarryingValue
732828000 usd
CY2023Q4 us-gaap Restricted Cash And Cash Equivalents At Carrying Value
RestrictedCashAndCashEquivalentsAtCarryingValue
57403000 usd
CY2022Q4 us-gaap Restricted Cash And Cash Equivalents At Carrying Value
RestrictedCashAndCashEquivalentsAtCarryingValue
49779000 usd
CY2023Q4 us-gaap Marketable Securities Current
MarketableSecuritiesCurrent
15905000 usd
CY2022Q4 us-gaap Marketable Securities Current
MarketableSecuritiesCurrent
33068000 usd
CY2023Q4 us-gaap Accounts And Other Receivables Net Current
AccountsAndOtherReceivablesNetCurrent
693878000 usd
CY2022Q4 us-gaap Accounts And Other Receivables Net Current
AccountsAndOtherReceivablesNetCurrent
622764000 usd
CY2023Q4 us-gaap Prepaid Insurance
PrepaidInsurance
7013000 usd
CY2022Q4 us-gaap Prepaid Insurance
PrepaidInsurance
11706000 usd
CY2023Q4 us-gaap Other Assets Current
OtherAssetsCurrent
128220000 usd
CY2022Q4 us-gaap Other Assets Current
OtherAssetsCurrent
61728000 usd
CY2023Q4 us-gaap Assets Current
AssetsCurrent
1595292000 usd
CY2022Q4 us-gaap Assets Current
AssetsCurrent
1511873000 usd
CY2023Q4 us-gaap Property Plant And Equipment Net
PropertyPlantAndEquipmentNet
197424000 usd
CY2022Q4 us-gaap Property Plant And Equipment Net
PropertyPlantAndEquipmentNet
199992000 usd
CY2023Q4 us-gaap Operating Lease Right Of Use Asset
OperatingLeaseRightOfUseAsset
57438000 usd
CY2022Q4 us-gaap Operating Lease Right Of Use Asset
OperatingLeaseRightOfUseAsset
56532000 usd
CY2023Q4 nsp Nsp Depositsandprepaidhealthinsurance
NspDepositsandprepaidhealthinsurance
215070000 usd
CY2022Q4 nsp Nsp Depositsandprepaidhealthinsurance
NspDepositsandprepaidhealthinsurance
213270000 usd
CY2023Q4 us-gaap Intangible Assets Net Including Goodwill
IntangibleAssetsNetIncludingGoodwill
12707000 usd
CY2022Q4 us-gaap Intangible Assets Net Including Goodwill
IntangibleAssetsNetIncludingGoodwill
12707000 usd
CY2023Q4 us-gaap Deferred Income Tax Assets Net
DeferredIncomeTaxAssetsNet
20347000 usd
CY2022Q4 us-gaap Deferred Income Tax Assets Net
DeferredIncomeTaxAssetsNet
15533000 usd
CY2023Q4 us-gaap Other Assets Noncurrent
OtherAssetsNoncurrent
21381000 usd
CY2022Q4 us-gaap Other Assets Noncurrent
OtherAssetsNoncurrent
29354000 usd
CY2023Q4 us-gaap Assets
Assets
2119659000 usd
CY2022Q4 us-gaap Assets
Assets
2039261000 usd
CY2023Q4 us-gaap Accounts Payable Current
AccountsPayableCurrent
10693000 usd
CY2022Q4 us-gaap Accounts Payable Current
AccountsPayableCurrent
7732000 usd
CY2023Q4 us-gaap Accrued Payroll Taxes Current
AccruedPayrollTaxesCurrent
566373000 usd
CY2022Q4 us-gaap Accrued Payroll Taxes Current
AccruedPayrollTaxesCurrent
556085000 usd
CY2023Q4 nsp Accrued Worksite Employee Payroll Costs
AccruedWorksiteEmployeePayrollCosts
559194000 usd
CY2022Q4 nsp Accrued Worksite Employee Payroll Costs
AccruedWorksiteEmployeePayrollCosts
513397000 usd
CY2023Q4 nsp Accrued Health Insurance Costs
AccruedHealthInsuranceCosts
46460000 usd
CY2022Q4 nsp Accrued Health Insurance Costs
AccruedHealthInsuranceCosts
53402000 usd
CY2023Q4 us-gaap Workers Compensation Liability Current
WorkersCompensationLiabilityCurrent
60475000 usd
CY2022Q4 us-gaap Workers Compensation Liability Current
WorkersCompensationLiabilityCurrent
53485000 usd
CY2023Q4 us-gaap Accrued Salaries Current And Noncurrent
AccruedSalariesCurrentAndNoncurrent
64286000 usd
CY2022Q4 us-gaap Accrued Salaries Current And Noncurrent
AccruedSalariesCurrentAndNoncurrent
89147000 usd
CY2023Q4 us-gaap Accrued Liabilities Current
AccruedLiabilitiesCurrent
128808000 usd
CY2022Q4 us-gaap Accrued Liabilities Current
AccruedLiabilitiesCurrent
80122000 usd
CY2023Q4 us-gaap Liabilities Current
LiabilitiesCurrent
1436289000 usd
CY2022Q4 us-gaap Liabilities Current
LiabilitiesCurrent
1353370000 usd
CY2023Q4 us-gaap Workers Compensation Liability Noncurrent
WorkersCompensationLiabilityNoncurrent
162852000 usd
CY2022Q4 us-gaap Workers Compensation Liability Noncurrent
WorkersCompensationLiabilityNoncurrent
179629000 usd
CY2023Q4 us-gaap Long Term Debt Noncurrent
LongTermDebtNoncurrent
369400000 usd
CY2022Q4 us-gaap Long Term Debt Noncurrent
LongTermDebtNoncurrent
369400000 usd
CY2023Q4 us-gaap Operating Lease Liability Noncurrent
OperatingLeaseLiabilityNoncurrent
57494000 usd
CY2022Q4 us-gaap Operating Lease Liability Noncurrent
OperatingLeaseLiabilityNoncurrent
55587000 usd
CY2023Q4 us-gaap Liabilities Noncurrent
LiabilitiesNoncurrent
589746000 usd
CY2022Q4 us-gaap Liabilities Noncurrent
LiabilitiesNoncurrent
604616000 usd
CY2023Q4 us-gaap Commitments And Contingencies
CommitmentsAndContingencies
usd
CY2022Q4 us-gaap Commitments And Contingencies
CommitmentsAndContingencies
usd
CY2023Q4 us-gaap Common Stock Par Or Stated Value Per Share
CommonStockParOrStatedValuePerShare
0.01
CY2022Q4 us-gaap Common Stock Par Or Stated Value Per Share
CommonStockParOrStatedValuePerShare
0.01
CY2022Q4 us-gaap Preferred Stock Shares Authorized
PreferredStockSharesAuthorized
20000000 shares
CY2023Q4 us-gaap Preferred Stock Shares Authorized
PreferredStockSharesAuthorized
20000000 shares
CY2022Q4 us-gaap Preferred Stock Shares Issued
PreferredStockSharesIssued
0 shares
CY2023Q4 us-gaap Preferred Stock Shares Issued
PreferredStockSharesIssued
0 shares
CY2023Q4 us-gaap Preferred Stock Value
PreferredStockValue
0 usd
CY2022Q4 us-gaap Preferred Stock Value
PreferredStockValue
0 usd
CY2022Q4 us-gaap Common Stock Par Or Stated Value Per Share
CommonStockParOrStatedValuePerShare
0.01
CY2023Q4 us-gaap Common Stock Par Or Stated Value Per Share
CommonStockParOrStatedValuePerShare
0.01
CY2023Q4 us-gaap Common Stock Shares Authorized
CommonStockSharesAuthorized
120000000 shares
CY2022Q4 us-gaap Common Stock Shares Authorized
CommonStockSharesAuthorized
120000000 shares
CY2022Q4 us-gaap Common Stock Shares Issued
CommonStockSharesIssued
55489000 shares
CY2023 us-gaap Operating Income Loss
OperatingIncomeLoss
218549000 usd
CY2022 us-gaap Operating Income Loss
OperatingIncomeLoss
250239000 usd
CY2023Q4 us-gaap Common Stock Shares Issued
CommonStockSharesIssued
55489000 shares
CY2023Q4 us-gaap Common Stock Shares Outstanding
CommonStockSharesOutstanding
37281000 shares
CY2022Q4 us-gaap Common Stock Shares Outstanding
CommonStockSharesOutstanding
37881000 shares
CY2023Q4 us-gaap Common Stock Value
CommonStockValue
555000 usd
CY2022Q4 us-gaap Common Stock Value
CommonStockValue
555000 usd
CY2023Q4 us-gaap Additional Paid In Capital Common Stock
AdditionalPaidInCapitalCommonStock
185031000 usd
CY2022Q4 us-gaap Additional Paid In Capital Common Stock
AdditionalPaidInCapitalCommonStock
151144000 usd
CY2023Q4 us-gaap Treasury Stock Common Shares
TreasuryStockCommonShares
18208000 shares
CY2022Q4 us-gaap Treasury Stock Common Shares
TreasuryStockCommonShares
17608000 shares
CY2023Q4 us-gaap Treasury Stock Value
TreasuryStockValue
830524000 usd
CY2022Q4 us-gaap Treasury Stock Value
TreasuryStockValue
725532000 usd
CY2023Q4 us-gaap Accumulated Other Comprehensive Income Loss Net Of Tax
AccumulatedOtherComprehensiveIncomeLossNetOfTax
9000 usd
CY2022Q4 us-gaap Accumulated Other Comprehensive Income Loss Net Of Tax
AccumulatedOtherComprehensiveIncomeLossNetOfTax
-82000 usd
CY2023Q4 us-gaap Retained Earnings Accumulated Deficit
RetainedEarningsAccumulatedDeficit
738553000 usd
CY2022Q4 us-gaap Retained Earnings Accumulated Deficit
RetainedEarningsAccumulatedDeficit
655190000 usd
CY2023Q4 us-gaap Stockholders Equity
StockholdersEquity
93624000 usd
CY2022Q4 us-gaap Stockholders Equity
StockholdersEquity
81275000 usd
CY2023Q4 us-gaap Liabilities And Stockholders Equity
LiabilitiesAndStockholdersEquity
2119659000 usd
CY2022Q4 us-gaap Liabilities And Stockholders Equity
LiabilitiesAndStockholdersEquity
2039261000 usd
CY2023 dei Document Fiscal Year Focus
DocumentFiscalYearFocus
2023
CY2023 dei Document Type
DocumentType
10-K
CY2023 dei Document Fiscal Year Focus
DocumentFiscalYearFocus
2023
CY2023 us-gaap Revenue From Contract With Customer Excluding Assessed Tax
RevenueFromContractWithCustomerExcludingAssessedTax
6485871000 usd
CY2022 us-gaap Revenue From Contract With Customer Excluding Assessed Tax
RevenueFromContractWithCustomerExcludingAssessedTax
5938818000 usd
CY2021 us-gaap Revenue From Contract With Customer Excluding Assessed Tax
RevenueFromContractWithCustomerExcludingAssessedTax
4973070000 usd
CY2023 nsp Payroll Taxes Benefits And Workers Compensation Costs
PayrollTaxesBenefitsAndWorkersCompensationCosts
5449068000 usd
CY2022 nsp Payroll Taxes Benefits And Workers Compensation Costs
PayrollTaxesBenefitsAndWorkersCompensationCosts
4927585000 usd
CY2021 nsp Payroll Taxes Benefits And Workers Compensation Costs
PayrollTaxesBenefitsAndWorkersCompensationCosts
4152968000 usd
CY2023 us-gaap Gross Profit
GrossProfit
1036803000 usd
CY2022 us-gaap Gross Profit
GrossProfit
1011233000 usd
CY2021 us-gaap Gross Profit
GrossProfit
820102000 usd
CY2023 nsp Salaries Wages And Payroll Taxes
SalariesWagesAndPayrollTaxes
460715000 usd
CY2022 nsp Salaries Wages And Payroll Taxes
SalariesWagesAndPayrollTaxes
430945000 usd
CY2021 nsp Salaries Wages And Payroll Taxes
SalariesWagesAndPayrollTaxes
379171000 usd
CY2023 us-gaap Allocated Share Based Compensation Expense
AllocatedShareBasedCompensationExpense
52996000 usd
CY2022 us-gaap Allocated Share Based Compensation Expense
AllocatedShareBasedCompensationExpense
50080000 usd
CY2021 us-gaap Allocated Share Based Compensation Expense
AllocatedShareBasedCompensationExpense
40623000 usd
CY2023 us-gaap Sales Commissions And Fees
SalesCommissionsAndFees
46847000 usd
CY2022 us-gaap Sales Commissions And Fees
SalesCommissionsAndFees
45672000 usd
CY2021 us-gaap Sales Commissions And Fees
SalesCommissionsAndFees
34922000 usd
CY2023 us-gaap Advertising Expense
AdvertisingExpense
37324000 usd
CY2022 us-gaap Advertising Expense
AdvertisingExpense
37503000 usd
CY2021 us-gaap Advertising Expense
AdvertisingExpense
29097000 usd
CY2023 us-gaap General And Administrative Expense
GeneralAndAdministrativeExpense
177664000 usd
CY2022 us-gaap General And Administrative Expense
GeneralAndAdministrativeExpense
156134000 usd
CY2021 us-gaap General And Administrative Expense
GeneralAndAdministrativeExpense
124413000 usd
CY2023 us-gaap Depreciation And Amortization
DepreciationAndAmortization
42708000 usd
CY2022 us-gaap Depreciation And Amortization
DepreciationAndAmortization
40660000 usd
CY2021 us-gaap Depreciation And Amortization
DepreciationAndAmortization
38547000 usd
CY2023 us-gaap Operating Expenses
OperatingExpenses
818254000 usd
CY2022 us-gaap Operating Expenses
OperatingExpenses
760994000 usd
CY2021 us-gaap Operating Expenses
OperatingExpenses
646773000 usd
CY2021 us-gaap Operating Income Loss
OperatingIncomeLoss
173329000 usd
CY2023 us-gaap Interest Income Other
InterestIncomeOther
33666000 usd
CY2022 us-gaap Interest Income Other
InterestIncomeOther
9393000 usd
CY2021 us-gaap Interest Income Other
InterestIncomeOther
2447000 usd
CY2023 us-gaap Interest Expense
InterestExpense
27137000 usd
CY2022 us-gaap Interest Expense
InterestExpense
14207000 usd
CY2021 us-gaap Interest Expense
InterestExpense
7458000 usd
CY2023 us-gaap Income Loss From Continuing Operations Before Income Taxes Extraordinary Items Noncontrolling Interest
IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest
225078000 usd
CY2022 us-gaap Income Loss From Continuing Operations Before Income Taxes Extraordinary Items Noncontrolling Interest
IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest
245425000 usd
CY2021 us-gaap Income Loss From Continuing Operations Before Income Taxes Extraordinary Items Noncontrolling Interest
IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest
168318000 usd
CY2023 us-gaap Income Tax Expense Benefit
IncomeTaxExpenseBenefit
53696000 usd
CY2022 us-gaap Income Tax Expense Benefit
IncomeTaxExpenseBenefit
66075000 usd
CY2021 us-gaap Income Tax Expense Benefit
IncomeTaxExpenseBenefit
44238000 usd
CY2023 us-gaap Net Income Loss
NetIncomeLoss
171382000 usd
CY2022 us-gaap Net Income Loss
NetIncomeLoss
179350000 usd
CY2021 us-gaap Net Income Loss
NetIncomeLoss
124080000 usd
CY2023 us-gaap Other Comprehensive Income Unrealized Holding Gain Loss On Securities Arising During Period Net Of Tax
OtherComprehensiveIncomeUnrealizedHoldingGainLossOnSecuritiesArisingDuringPeriodNetOfTax
91000 usd
CY2022 us-gaap Other Comprehensive Income Unrealized Holding Gain Loss On Securities Arising During Period Net Of Tax
OtherComprehensiveIncomeUnrealizedHoldingGainLossOnSecuritiesArisingDuringPeriodNetOfTax
-73000 usd
CY2021 us-gaap Other Comprehensive Income Unrealized Holding Gain Loss On Securities Arising During Period Net Of Tax
OtherComprehensiveIncomeUnrealizedHoldingGainLossOnSecuritiesArisingDuringPeriodNetOfTax
-14000 usd
CY2023 us-gaap Comprehensive Income Net Of Tax
ComprehensiveIncomeNetOfTax
171473000 usd
CY2022 us-gaap Comprehensive Income Net Of Tax
ComprehensiveIncomeNetOfTax
179277000 usd
CY2021 us-gaap Comprehensive Income Net Of Tax
ComprehensiveIncomeNetOfTax
124066000 usd
CY2023 us-gaap Earnings Per Share Basic
EarningsPerShareBasic
4.53
CY2022 us-gaap Earnings Per Share Basic
EarningsPerShareBasic
4.70
CY2021 us-gaap Earnings Per Share Basic
EarningsPerShareBasic
3.22
CY2023 us-gaap Earnings Per Share Diluted
EarningsPerShareDiluted
4.47
CY2022 us-gaap Earnings Per Share Diluted
EarningsPerShareDiluted
4.64
CY2021 us-gaap Earnings Per Share Diluted
EarningsPerShareDiluted
3.18
CY2023 dei Document Fiscal Year Focus
DocumentFiscalYearFocus
2023
CY2023 dei Document Type
DocumentType
10-K
CY2020Q4 us-gaap Stockholders Equity
StockholdersEquity
44132000 usd
CY2021 us-gaap Treasury Stock Value Acquired Cost Method
TreasuryStockValueAcquiredCostMethod
69725000 usd
CY2021 us-gaap Stock Issued During Period Value Share Based Compensation Gross
StockIssuedDuringPeriodValueShareBasedCompensationGross
0 usd
CY2021 us-gaap Stock Issued During Period Value Stock Options Exercised
StockIssuedDuringPeriodValueStockOptionsExercised
240000 usd
CY2021 us-gaap Stockholders Equity Other
StockholdersEquityOther
-3069000 usd
CY2021 us-gaap Dividends Common Stock Cash
DividendsCommonStockCash
144179000 usd
CY2021 us-gaap Other Comprehensive Income Unrealized Holding Gain Loss On Securities Arising During Period Net Of Tax
OtherComprehensiveIncomeUnrealizedHoldingGainLossOnSecuritiesArisingDuringPeriodNetOfTax
-14000 usd
CY2021 us-gaap Net Income Loss
NetIncomeLoss
124080000 usd
CY2021Q4 us-gaap Shares Issued
SharesIssued
55489000 shares
CY2021Q4 us-gaap Stockholders Equity
StockholdersEquity
-1774000 usd
CY2022 us-gaap Treasury Stock Value Acquired Cost Method
TreasuryStockValueAcquiredCostMethod
73285000 usd
CY2022 us-gaap Stock Issued During Period Value Share Based Compensation Gross
StockIssuedDuringPeriodValueShareBasedCompensationGross
0 usd
CY2022 us-gaap Adjustments To Additional Paid In Capital Sharebased Compensation Requisite Service Period Recognition Value
AdjustmentsToAdditionalPaidInCapitalSharebasedCompensationRequisiteServicePeriodRecognitionValue
50080000 usd
CY2022 us-gaap Stockholders Equity Other
StockholdersEquityOther
-3569000 usd
CY2022 us-gaap Dividends Common Stock Cash
DividendsCommonStockCash
76592000 usd
CY2022 us-gaap Other Comprehensive Income Unrealized Holding Gain Loss On Securities Arising During Period Net Of Tax
OtherComprehensiveIncomeUnrealizedHoldingGainLossOnSecuritiesArisingDuringPeriodNetOfTax
-73000 usd
CY2022 us-gaap Net Income Loss
NetIncomeLoss
179350000 usd
CY2022Q4 us-gaap Shares Issued
SharesIssued
55489000 shares
CY2022Q4 us-gaap Stockholders Equity
StockholdersEquity
81275000 usd
CY2023 us-gaap Treasury Stock Value Acquired Cost Method
TreasuryStockValueAcquiredCostMethod
132063000 usd
CY2023 us-gaap Stock Issued During Period Value Share Based Compensation Gross
StockIssuedDuringPeriodValueShareBasedCompensationGross
0 usd
CY2023 us-gaap Adjustments To Additional Paid In Capital Sharebased Compensation Requisite Service Period Recognition Value
AdjustmentsToAdditionalPaidInCapitalSharebasedCompensationRequisiteServicePeriodRecognitionValue
52996000 usd
CY2023 us-gaap Stockholders Equity Other
StockholdersEquityOther
-4162000 usd
CY2023 us-gaap Dividends Common Stock Cash
DividendsCommonStockCash
84219000 usd
CY2023 us-gaap Other Comprehensive Income Unrealized Holding Gain Loss On Securities Arising During Period Net Of Tax
OtherComprehensiveIncomeUnrealizedHoldingGainLossOnSecuritiesArisingDuringPeriodNetOfTax
91000 usd
CY2023 us-gaap Net Income Loss
NetIncomeLoss
171382000 usd
CY2023Q4 us-gaap Shares Issued
SharesIssued
55489000 shares
CY2023Q4 us-gaap Stockholders Equity
StockholdersEquity
93624000 usd
CY2023 us-gaap Net Income Loss
NetIncomeLoss
171382000 usd
CY2022 us-gaap Net Income Loss
NetIncomeLoss
179350000 usd
CY2021 us-gaap Net Income Loss
NetIncomeLoss
124080000 usd
CY2023 us-gaap Depreciation Depletion And Amortization
DepreciationDepletionAndAmortization
42708000 usd
CY2022 us-gaap Depreciation Depletion And Amortization
DepreciationDepletionAndAmortization
40660000 usd
CY2021 us-gaap Depreciation Depletion And Amortization
DepreciationDepletionAndAmortization
38547000 usd
CY2023 us-gaap Share Based Compensation
ShareBasedCompensation
52996000 usd
CY2022 us-gaap Share Based Compensation
ShareBasedCompensation
50080000 usd
CY2021 us-gaap Share Based Compensation
ShareBasedCompensation
40623000 usd
CY2023 us-gaap Deferred Income Tax Expense Benefit
DeferredIncomeTaxExpenseBenefit
-4814000 usd
CY2022 us-gaap Deferred Income Tax Expense Benefit
DeferredIncomeTaxExpenseBenefit
-10641000 usd
CY2021 us-gaap Deferred Income Tax Expense Benefit
DeferredIncomeTaxExpenseBenefit
4711000 usd
CY2023 us-gaap Increase Decrease In Accounts Receivable
IncreaseDecreaseInAccountsReceivable
71114000 usd
CY2022 us-gaap Increase Decrease In Accounts Receivable
IncreaseDecreaseInAccountsReceivable
109458000 usd
CY2021 us-gaap Increase Decrease In Accounts Receivable
IncreaseDecreaseInAccountsReceivable
120560000 usd
CY2023 us-gaap Increase Decrease In Prepaid Expense
IncreaseDecreaseInPrepaidExpense
-4693000 usd
CY2022 us-gaap Increase Decrease In Prepaid Expense
IncreaseDecreaseInPrepaidExpense
421000 usd
CY2021 us-gaap Increase Decrease In Prepaid Expense
IncreaseDecreaseInPrepaidExpense
1121000 usd
CY2023 us-gaap Increase Decrease In Other Current Assets
IncreaseDecreaseInOtherCurrentAssets
14215000 usd
CY2022 us-gaap Increase Decrease In Other Current Assets
IncreaseDecreaseInOtherCurrentAssets
5206000 usd
CY2021 us-gaap Increase Decrease In Other Current Assets
IncreaseDecreaseInOtherCurrentAssets
13851000 usd
CY2023 us-gaap Increase Decrease In Other Noncurrent Assets
IncreaseDecreaseInOtherNoncurrentAssets
-23523000 usd
CY2022 us-gaap Increase Decrease In Other Noncurrent Assets
IncreaseDecreaseInOtherNoncurrentAssets
-2600000 usd
CY2021 us-gaap Increase Decrease In Other Noncurrent Assets
IncreaseDecreaseInOtherNoncurrentAssets
-5240000 usd
CY2023 us-gaap Increase Decrease In Accounts Payable Trade
IncreaseDecreaseInAccountsPayableTrade
2961000 usd
CY2022 us-gaap Increase Decrease In Accounts Payable Trade
IncreaseDecreaseInAccountsPayableTrade
1320000 usd
CY2021 us-gaap Increase Decrease In Accounts Payable Trade
IncreaseDecreaseInAccountsPayableTrade
209000 usd
CY2023 us-gaap Increase Decrease In Other Employee Related Liabilities
IncreaseDecreaseInOtherEmployeeRelatedLiabilities
10288000 usd
CY2022 us-gaap Increase Decrease In Other Employee Related Liabilities
IncreaseDecreaseInOtherEmployeeRelatedLiabilities
88193000 usd
CY2021 us-gaap Increase Decrease In Other Employee Related Liabilities
IncreaseDecreaseInOtherEmployeeRelatedLiabilities
89932000 usd
CY2023 nsp Increase Decreasein Wse Epayrollexpense
IncreaseDecreaseinWSEEpayrollexpense
45797000 usd
CY2022 nsp Increase Decreasein Wse Epayrollexpense
IncreaseDecreaseinWSEEpayrollexpense
103744000 usd
CY2021 nsp Increase Decreasein Wse Epayrollexpense
IncreaseDecreaseinWSEEpayrollexpense
74817000 usd
CY2023 us-gaap Increase Decrease In Health Care Insurance Liabilities
IncreaseDecreaseInHealthCareInsuranceLiabilities
-6942000 usd
CY2022 us-gaap Increase Decrease In Health Care Insurance Liabilities
IncreaseDecreaseInHealthCareInsuranceLiabilities
3401000 usd
CY2021 us-gaap Increase Decrease In Health Care Insurance Liabilities
IncreaseDecreaseInHealthCareInsuranceLiabilities
17316000 usd
CY2023 us-gaap Increase Decrease In Workers Compensation Liabilities
IncreaseDecreaseInWorkersCompensationLiabilities
-9787000 usd
CY2022 us-gaap Increase Decrease In Workers Compensation Liabilities
IncreaseDecreaseInWorkersCompensationLiabilities
-10114000 usd
CY2021 us-gaap Increase Decrease In Workers Compensation Liabilities
IncreaseDecreaseInWorkersCompensationLiabilities
-197000 usd
CY2023 us-gaap Increase Decrease In Accrued Salaries
IncreaseDecreaseInAccruedSalaries
-44620000 usd
CY2022 us-gaap Increase Decrease In Accrued Salaries
IncreaseDecreaseInAccruedSalaries
-5179000 usd
CY2021 us-gaap Increase Decrease In Accrued Salaries
IncreaseDecreaseInAccruedSalaries
14716000 usd
CY2023 us-gaap Increase Decrease In Income Taxes
IncreaseDecreaseInIncomeTaxes
-4368000 usd
CY2022 us-gaap Increase Decrease In Income Taxes
IncreaseDecreaseInIncomeTaxes
19362000 usd
CY2021 us-gaap Increase Decrease In Income Taxes
IncreaseDecreaseInIncomeTaxes
-14307000 usd
CY2023 us-gaap Adjustments To Reconcile Net Income Loss To Cash Provided By Used In Operating Activities
AdjustmentsToReconcileNetIncomeLossToCashProvidedByUsedInOperatingActivities
27106000 usd
CY2022 us-gaap Adjustments To Reconcile Net Income Loss To Cash Provided By Used In Operating Activities
AdjustmentsToReconcileNetIncomeLossToCashProvidedByUsedInOperatingActivities
168341000 usd
CY2021 us-gaap Adjustments To Reconcile Net Income Loss To Cash Provided By Used In Operating Activities
AdjustmentsToReconcileNetIncomeLossToCashProvidedByUsedInOperatingActivities
136075000 usd
CY2023 us-gaap Net Cash Provided By Used In Operating Activities
NetCashProvidedByUsedInOperatingActivities
198488000 usd
CY2022 us-gaap Net Cash Provided By Used In Operating Activities
NetCashProvidedByUsedInOperatingActivities
347691000 usd
CY2021 us-gaap Net Cash Provided By Used In Operating Activities
NetCashProvidedByUsedInOperatingActivities
260155000 usd
CY2023 us-gaap Payments To Acquire Marketable Securities
PaymentsToAcquireMarketableSecurities
47983000 usd
CY2022 us-gaap Payments To Acquire Marketable Securities
PaymentsToAcquireMarketableSecurities
46748000 usd
CY2021 us-gaap Payments To Acquire Marketable Securities
PaymentsToAcquireMarketableSecurities
58202000 usd
CY2023 us-gaap Proceeds From Maturities Prepayments And Calls Of Available For Sale Securities
ProceedsFromMaturitiesPrepaymentsAndCallsOfAvailableForSaleSecurities
38635000 usd
CY2022 us-gaap Proceeds From Maturities Prepayments And Calls Of Available For Sale Securities
ProceedsFromMaturitiesPrepaymentsAndCallsOfAvailableForSaleSecurities
44955000 usd
CY2021 us-gaap Proceeds From Maturities Prepayments And Calls Of Available For Sale Securities
ProceedsFromMaturitiesPrepaymentsAndCallsOfAvailableForSaleSecurities
60045000 usd
CY2023 us-gaap Proceeds From Sale Of Available For Sale Securities Debt
ProceedsFromSaleOfAvailableForSaleSecuritiesDebt
27735000 usd
CY2022 us-gaap Proceeds From Sale Of Available For Sale Securities Debt
ProceedsFromSaleOfAvailableForSaleSecuritiesDebt
0 usd
CY2021 us-gaap Proceeds From Sale Of Available For Sale Securities Debt
ProceedsFromSaleOfAvailableForSaleSecuritiesDebt
0 usd
CY2023 us-gaap Payments To Acquire Property Plant And Equipment
PaymentsToAcquirePropertyPlantAndEquipment
40117000 usd
CY2022 us-gaap Payments To Acquire Property Plant And Equipment
PaymentsToAcquirePropertyPlantAndEquipment
30329000 usd
CY2021 us-gaap Payments To Acquire Property Plant And Equipment
PaymentsToAcquirePropertyPlantAndEquipment
32856000 usd
CY2023 us-gaap Net Cash Provided By Used In Investing Activities
NetCashProvidedByUsedInInvestingActivities
-21730000 usd
CY2022 us-gaap Net Cash Provided By Used In Investing Activities
NetCashProvidedByUsedInInvestingActivities
-32122000 usd
CY2021 us-gaap Net Cash Provided By Used In Investing Activities
NetCashProvidedByUsedInInvestingActivities
-31013000 usd
CY2023 us-gaap Payments For Repurchase Of Common Stock
PaymentsForRepurchaseOfCommonStock
131519000 usd
CY2022 us-gaap Payments For Repurchase Of Common Stock
PaymentsForRepurchaseOfCommonStock
73285000 usd
CY2021 us-gaap Payments For Repurchase Of Common Stock
PaymentsForRepurchaseOfCommonStock
69725000 usd
CY2023 us-gaap Payments Of Dividends Common Stock
PaymentsOfDividendsCommonStock
84219000 usd
CY2022 us-gaap Payments Of Dividends Common Stock
PaymentsOfDividendsCommonStock
76592000 usd
CY2021 us-gaap Payments Of Dividends Common Stock
PaymentsOfDividendsCommonStock
144179000 usd
CY2023 us-gaap Proceeds From Payments For Other Financing Activities
ProceedsFromPaymentsForOtherFinancingActivities
60726000 usd
CY2022 us-gaap Proceeds From Payments For Other Financing Activities
ProceedsFromPaymentsForOtherFinancingActivities
8727000 usd
CY2021 us-gaap Proceeds From Payments For Other Financing Activities
ProceedsFromPaymentsForOtherFinancingActivities
5831000 usd
CY2023 us-gaap Net Cash Provided By Used In Financing Activities
NetCashProvidedByUsedInFinancingActivities
-155012000 usd
CY2022 us-gaap Net Cash Provided By Used In Financing Activities
NetCashProvidedByUsedInFinancingActivities
-141150000 usd
CY2021 us-gaap Net Cash Provided By Used In Financing Activities
NetCashProvidedByUsedInFinancingActivities
-208073000 usd
CY2023 us-gaap Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents Period Increase Decrease Excluding Exchange Rate Effect
CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalentsPeriodIncreaseDecreaseExcludingExchangeRateEffect
21746000 usd
CY2022 us-gaap Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents Period Increase Decrease Excluding Exchange Rate Effect
CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalentsPeriodIncreaseDecreaseExcludingExchangeRateEffect
174419000 usd
CY2021 us-gaap Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents Period Increase Decrease Excluding Exchange Rate Effect
CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalentsPeriodIncreaseDecreaseExcludingExchangeRateEffect
21069000 usd
CY2022Q4 us-gaap Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents
CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents
1013919000 usd
CY2021Q4 us-gaap Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents
CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents
839500000 usd
CY2020Q4 us-gaap Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents
CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents
786699000 usd
CY2023Q4 us-gaap Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents
CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents
1035665000 usd
CY2022Q4 us-gaap Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents
CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents
1013919000 usd
CY2023 dei Document Fiscal Year Focus
DocumentFiscalYearFocus
2023
CY2023 dei Document Type
DocumentType
10-K
CY2023 dei Document Fiscal Year Focus
DocumentFiscalYearFocus
2023
CY2023 us-gaap Income Taxes Paid Net
IncomeTaxesPaidNet
62879000 usd
CY2022 us-gaap Income Taxes Paid Net
IncomeTaxesPaidNet
57354000 usd
CY2021 us-gaap Income Taxes Paid Net
IncomeTaxesPaidNet
53835000 usd
CY2023 us-gaap Interest Paid Net
InterestPaidNet
22067000 usd
CY2022 us-gaap Interest Paid Net
InterestPaidNet
13402000 usd
CY2021 us-gaap Interest Paid Net
InterestPaidNet
7268000 usd
CY2023 us-gaap Right Of Use Asset Obtained In Exchange For Operating Lease Liability
RightOfUseAssetObtainedInExchangeForOperatingLeaseLiability
22177000 usd
CY2022 us-gaap Right Of Use Asset Obtained In Exchange For Operating Lease Liability
RightOfUseAssetObtainedInExchangeForOperatingLeaseLiability
9736000 usd
CY2021 us-gaap Right Of Use Asset Obtained In Exchange For Operating Lease Liability
RightOfUseAssetObtainedInExchangeForOperatingLeaseLiability
19572000 usd
CY2023 nsp Excisetaxliabilityaccruedforcommonstockrepurchases
Excisetaxliabilityaccruedforcommonstockrepurchases
544000 usd
CY2022 nsp Excisetaxliabilityaccruedforcommonstockrepurchases
Excisetaxliabilityaccruedforcommonstockrepurchases
0 usd
CY2021 nsp Excisetaxliabilityaccruedforcommonstockrepurchases
Excisetaxliabilityaccruedforcommonstockrepurchases
0 usd
CY2023 dei Document Fiscal Year Focus
DocumentFiscalYearFocus
2023
CY2023 dei Document Type
DocumentType
10-K
CY2023 dei Document Fiscal Year Focus
DocumentFiscalYearFocus
2023
CY2023 dei Document Type
DocumentType
10-K
CY2023Q4 nsp Unbilled
Unbilled
668900000 usd
CY2022Q4 nsp Unbilled
Unbilled
600400000 usd
CY2023 dei Document Fiscal Year Focus
DocumentFiscalYearFocus
2023
CY2023 us-gaap Revenue From Contract With Customer Excluding Assessed Tax
RevenueFromContractWithCustomerExcludingAssessedTax
6485871000 usd
CY2022 us-gaap Revenue From Contract With Customer Excluding Assessed Tax
RevenueFromContractWithCustomerExcludingAssessedTax
5938818000 usd
CY2021 us-gaap Revenue From Contract With Customer Excluding Assessed Tax
RevenueFromContractWithCustomerExcludingAssessedTax
4973070000 usd
CY2023 nsp Gross Billings
GrossBillings
43141366000 usd
CY2022 nsp Gross Billings
GrossBillings
40126910000 usd
CY2021 nsp Gross Billings
GrossBillings
33318693000 usd
CY2023 nsp Worksite Employee Payroll Cost
WorksiteEmployeePayrollCost
36655495000 usd
CY2022 nsp Worksite Employee Payroll Cost
WorksiteEmployeePayrollCost
34188092000 usd
CY2021 nsp Worksite Employee Payroll Cost
WorksiteEmployeePayrollCost
28345623000 usd
CY2023 us-gaap Revenue From Contract With Customer Excluding Assessed Tax
RevenueFromContractWithCustomerExcludingAssessedTax
6485871000 usd
CY2022 us-gaap Revenue From Contract With Customer Excluding Assessed Tax
RevenueFromContractWithCustomerExcludingAssessedTax
5938818000 usd
CY2021 us-gaap Revenue From Contract With Customer Excluding Assessed Tax
RevenueFromContractWithCustomerExcludingAssessedTax
4973070000 usd
CY2023 us-gaap Number Of Reportable Segments
NumberOfReportableSegments
1 a1
CY2023 dei Document Fiscal Year Focus
DocumentFiscalYearFocus
2023
CY2023 dei Document Type
DocumentType
10-K
CY2023 us-gaap Use Of Estimates
UseOfEstimates
<div style="margin-bottom:10pt;margin-top:10pt"><span style="color:#009639;font-family:'Arial',sans-serif;font-size:10pt;font-style:italic;font-weight:700;line-height:120%">Use of Estimates</span></div><div style="margin-bottom:10pt;margin-top:10pt"><span style="color:#000000;font-family:'Arial',sans-serif;font-size:10pt;font-weight:400;line-height:120%">The preparation of financial statements in conformity with United States Generally Accepted Accounting Principles (“GAAP”) requires management to make estimates and assumptions that affect the amounts reported in the financial statements and accompanying notes. Actual results could differ from those estimates.</span></div>
CY2023 us-gaap Concentration Risk Credit Risk
ConcentrationRiskCreditRisk
<div style="margin-bottom:10pt;margin-top:10pt"><span style="color:#009639;font-family:'Arial',sans-serif;font-size:10pt;font-style:italic;font-weight:700;line-height:120%">Concentrations of Credit Risk</span></div><div style="margin-bottom:10pt;margin-top:10pt"><span style="color:#000000;font-family:'Arial',sans-serif;font-size:10pt;font-weight:400;line-height:120%">Financial instruments that could potentially subject us to concentration of credit risk include accounts receivable and marketable securities.</span></div>
CY2023Q4 us-gaap Property Plant And Equipment Gross
PropertyPlantAndEquipmentGross
557881000 usd
CY2022Q4 us-gaap Property Plant And Equipment Gross
PropertyPlantAndEquipmentGross
530613000 usd
CY2023Q4 us-gaap Accumulated Depreciation Depletion And Amortization Property Plant And Equipment
AccumulatedDepreciationDepletionAndAmortizationPropertyPlantAndEquipment
360457000 usd
CY2022Q4 us-gaap Accumulated Depreciation Depletion And Amortization Property Plant And Equipment
AccumulatedDepreciationDepletionAndAmortizationPropertyPlantAndEquipment
330621000 usd
CY2023Q4 us-gaap Property Plant And Equipment Net
PropertyPlantAndEquipmentNet
197424000 usd
CY2022Q4 us-gaap Property Plant And Equipment Net
PropertyPlantAndEquipmentNet
199992000 usd
CY2023 dei Document Type
DocumentType
10-K
CY2023 us-gaap Capitalized Computer Software Amortization1
CapitalizedComputerSoftwareAmortization1
13800000 usd
CY2022 us-gaap Capitalized Computer Software Amortization1
CapitalizedComputerSoftwareAmortization1
13200000 usd
CY2021 us-gaap Capitalized Computer Software Amortization1
CapitalizedComputerSoftwareAmortization1
10900000 usd
CY2023Q4 us-gaap Capitalized Computer Software Net
CapitalizedComputerSoftwareNet
33300000 usd
CY2022Q4 us-gaap Capitalized Computer Software Net
CapitalizedComputerSoftwareNet
33700000 usd
CY2023 dei Document Fiscal Year Focus
DocumentFiscalYearFocus
2023
CY2023 dei Document Fiscal Year Focus
DocumentFiscalYearFocus
2023
CY2023 dei Document Fiscal Year Focus
DocumentFiscalYearFocus
2023
CY2023 dei Document Fiscal Year Focus
DocumentFiscalYearFocus
2023
CY2023 dei Document Fiscal Year Focus
DocumentFiscalYearFocus
2023
CY2023 dei Document Type
DocumentType
10-K
CY2023Q4 nsp Percentageofourhealthinsurancecoverageprovidedby United
PercentageofourhealthinsurancecoverageprovidedbyUnited
0.87
CY2023 nsp Number Of Days In Advance Of Beginning Of Reporting Quarter Carrier Establishes Cash Funding Rates
NumberOfDaysInAdvanceOfBeginningOfReportingQuarterCarrierEstablishesCashFundingRates
P90D
CY2023Q4 nsp Prepaid Health Insurance Noncurrent
PrepaidHealthInsuranceNoncurrent
9000000 usd
CY2023Q4 nsp Required Deposit For Health Care Costs
RequiredDepositForHealthCareCosts
6500000 usd
CY2023Q4 nsp Prepaid Health Insurance Current
PrepaidHealthInsuranceCurrent
-23500000 usd
CY2023Q4 nsp Prepaid Health Insurance Noncurrent
PrepaidHealthInsuranceNoncurrent
9000000 usd
CY2023Q4 nsp Prepaid Health Insurance Current And Noncurrent
PrepaidHealthInsuranceCurrentAndNoncurrent
-32500000 usd
CY2023Q4 nsp Premiums Owed To United
PremiumsOwedToUnited
-6500000 usd
CY2023Q4 nsp Benefits Costs Incurred Reduced Relatedto Runoff
BenefitsCostsIncurredReducedRelatedtoRunoff
-13000000 usd
CY2022Q4 nsp Benefits Costs Incurred Reduced Relatedto Runoff
BenefitsCostsIncurredReducedRelatedtoRunoff
12100000 usd
CY2019Q3 nsp Workers Compensation Maximum Economic Burden First Layer Of Claims Per Occurrence
WorkersCompensationMaximumEconomicBurdenFirstLayerOfClaimsPerOccurrence
1000000 usd
CY2019Q3 nsp Workers Compensation Maximum Economic Burden First Layer Of Claims Per Occurrence
WorkersCompensationMaximumEconomicBurdenFirstLayerOfClaimsPerOccurrence
1000000 usd
CY2019Q3 nsp Workers Compensation Maximum Aggregate Economic Burden For Claims In Excess Of First Layer Cap Per Policy Year
WorkersCompensationMaximumAggregateEconomicBurdenForClaimsInExcessOfFirstLayerCapPerPolicyYear
6000000 usd
CY2019Q3 nsp Workers Compensation Maximum Economic Burden First Layer Of Claims Per Occurrence
WorkersCompensationMaximumEconomicBurdenFirstLayerOfClaimsPerOccurrence
1000000 usd
CY2019Q4 nsp Workers Compensation Maximum Economic Burden First Layer Of Claims Per Occurrence
WorkersCompensationMaximumEconomicBurdenFirstLayerOfClaimsPerOccurrence
1500000 usd
CY2019Q4 nsp Workers Compensation Maximum Economic Burden First Layer Of Claims Per Occurrence
WorkersCompensationMaximumEconomicBurdenFirstLayerOfClaimsPerOccurrence
1500000 usd
CY2019Q4 nsp Workers Compensation Maximum Aggregate Economic Burden For Claims In Excess Of First Layer Cap Per Policy Year
WorkersCompensationMaximumAggregateEconomicBurdenForClaimsInExcessOfFirstLayerCapPerPolicyYear
6000000 usd
CY2019Q4 nsp Workers Compensation Maximum Economic Burden First Layer Of Claims Per Occurrence
WorkersCompensationMaximumEconomicBurdenFirstLayerOfClaimsPerOccurrence
1500000 usd
CY2023 dei Document Fiscal Year Focus
DocumentFiscalYearFocus
2023
CY2023 dei Document Type
DocumentType
10-K
CY2023 nsp Decrease Increase In Accrued Workers Compensation Costs For Changes In Estimated Losses
DecreaseIncreaseInAccruedWorkersCompensationCostsForChangesInEstimatedLosses
-33500000 usd
CY2022 nsp Decrease Increase In Accrued Workers Compensation Costs For Changes In Estimated Losses
DecreaseIncreaseInAccruedWorkersCompensationCostsForChangesInEstimatedLosses
-42200000 usd
CY2021 nsp Decrease Increase In Accrued Workers Compensation Costs For Changes In Estimated Losses
DecreaseIncreaseInAccruedWorkersCompensationCostsForChangesInEstimatedLosses
-41700000 usd
CY2023 nsp Us Treasury Rates That Correspond With Weighted Average Estimated Claim Payout Period
USTreasuryRatesThatCorrespondWithWeightedAverageEstimatedClaimPayoutPeriod
0.043
CY2022 nsp Us Treasury Rates That Correspond With Weighted Average Estimated Claim Payout Period
USTreasuryRatesThatCorrespondWithWeightedAverageEstimatedClaimPayoutPeriod
0.029
CY2023 dei Document Fiscal Year Focus
DocumentFiscalYearFocus
2023
CY2022Q4 us-gaap Liability For Unpaid Claims And Claims Adjustment Expense Opening Balance Adjustments
LiabilityForUnpaidClaimsAndClaimsAdjustmentExpenseOpeningBalanceAdjustments
229408000 usd
CY2021Q4 us-gaap Liability For Unpaid Claims And Claims Adjustment Expense Opening Balance Adjustments
LiabilityForUnpaidClaimsAndClaimsAdjustmentExpenseOpeningBalanceAdjustments
239623000 usd
CY2023 nsp Workers Compensation Expense
WorkersCompensationExpense
61720000 usd
CY2022 nsp Workers Compensation Expense
WorkersCompensationExpense
49121000 usd
CY2023 nsp Workers Compensation Discount Changed During Period
WorkersCompensationDiscountChangedDuringPeriod
13430000 usd
CY2022 nsp Workers Compensation Discount Changed During Period
WorkersCompensationDiscountChangedDuringPeriod
9517000 usd
CY2023 us-gaap Payments For Losses And Loss Adjustment Expense
PaymentsForLossesAndLossAdjustmentExpense
57443000 usd
CY2022 us-gaap Payments For Losses And Loss Adjustment Expense
PaymentsForLossesAndLossAdjustmentExpense
49819000 usd
CY2023Q4 us-gaap Workers Compensation Liability Current And Noncurrent
WorkersCompensationLiabilityCurrentAndNoncurrent
220255000 usd
CY2022Q4 us-gaap Workers Compensation Liability Current And Noncurrent
WorkersCompensationLiabilityCurrentAndNoncurrent
229408000 usd
CY2023Q4 nsp Workers Compensation Liability Net Of Admin Fees Current
WorkersCompensationLiabilityNetOfAdminFeesCurrent
57403000 usd
CY2022Q4 nsp Workers Compensation Liability Net Of Admin Fees Current
WorkersCompensationLiabilityNetOfAdminFeesCurrent
49779000 usd
CY2023Q4 us-gaap Workers Compensation Liability Noncurrent
WorkersCompensationLiabilityNoncurrent
162852000 usd
CY2022Q4 us-gaap Workers Compensation Liability Noncurrent
WorkersCompensationLiabilityNoncurrent
179629000 usd
CY2023Q4 us-gaap Workers Compensation Liability Current And Noncurrent
WorkersCompensationLiabilityCurrentAndNoncurrent
220255000 usd
CY2022Q4 us-gaap Workers Compensation Liability Current And Noncurrent
WorkersCompensationLiabilityCurrentAndNoncurrent
229408000 usd
CY2023Q4 nsp Workers Compensation Administrative Fees Accrued
WorkersCompensationAdministrativeFeesAccrued
3100000 usd
CY2022Q4 nsp Workers Compensation Administrative Fees Accrued
WorkersCompensationAdministrativeFeesAccrued
3700000 usd
CY2023 nsp Undiscounted Accrued Workers Compensation Costs
UndiscountedAccruedWorkersCompensationCosts
250000000 usd
CY2022 nsp Undiscounted Accrued Workers Compensation Costs
UndiscountedAccruedWorkersCompensationCosts
250500000 usd
CY2023 nsp Time Period Incurred Claims Expected To Be Paid Recorded As Restricted
TimePeriodIncurredClaimsExpectedToBePaidRecordedAsRestricted
P1Y
CY2023 nsp Return Of Excess Claim Funds
ReturnOfExcessClaimFunds
46300000 usd
CY2023Q4 us-gaap Restricted Cash And Cash Equivalents At Carrying Value
RestrictedCashAndCashEquivalentsAtCarryingValue
57400000 usd
CY2023Q4 nsp Deposits Workers Compensation
DepositsWorkersCompensation
198200000 usd
CY2023 nsp Time Period Estimate Of Incurred Claim Costs To Be Paid Included In Short Term Liabilities
TimePeriodEstimateOfIncurredClaimCostsToBePaidIncludedInShortTermLiabilities
P1Y
CY2023 dei Document Fiscal Year Focus
DocumentFiscalYearFocus
2023
CY2023 dei Document Type
DocumentType
10-K
CY2023 dei Document Fiscal Year Focus
DocumentFiscalYearFocus
2023
CY2023 dei Document Fiscal Year Focus
DocumentFiscalYearFocus
2023
CY2023 dei Document Fiscal Year Focus
DocumentFiscalYearFocus
2023
CY2023 dei Document Fiscal Year Focus
DocumentFiscalYearFocus
2023
CY2023 dei Document Type
DocumentType
10-K
CY2023Q4 nsp Money Market Funds Overnight Holdings At Carrying Value
MoneyMarketFundsOvernightHoldingsAtCarryingValue
611100000 usd
CY2022Q4 nsp Money Market Funds Overnight Holdings At Carrying Value
MoneyMarketFundsOvernightHoldingsAtCarryingValue
678512000 usd
CY2023Q4 us-gaap Short Term Investments
ShortTermInvestments
135313000 usd
CY2022Q4 us-gaap Short Term Investments
ShortTermInvestments
90031000 usd
CY2023Q4 us-gaap Cash
Cash
26931000 usd
CY2022Q4 us-gaap Cash
Cash
41047000 usd
CY2023Q4 srt Drafts Payable
DraftsPayable
64566000 usd
CY2022Q4 srt Drafts Payable
DraftsPayable
43694000 usd
CY2023Q4 us-gaap Cash Cash Equivalents And Short Term Investments
CashCashEquivalentsAndShortTermInvestments
708778000 usd
CY2022Q4 us-gaap Cash Cash Equivalents And Short Term Investments
CashCashEquivalentsAndShortTermInvestments
765896000 usd
CY2023Q4 nsp Payroll Withholdings Included In Cash Balance
PayrollWithholdingsIncludedInCashBalance
510100000 usd
CY2022Q4 nsp Payroll Withholdings Included In Cash Balance
PayrollWithholdingsIncludedInCashBalance
504800000 usd
CY2023Q4 nsp Client Prepayments Included In Cash Balance
ClientPrepaymentsIncludedInCashBalance
27600000 usd
CY2022Q4 nsp Client Prepayments Included In Cash Balance
ClientPrepaymentsIncludedInCashBalance
36800000 usd
CY2023 dei Document Fiscal Year Focus
DocumentFiscalYearFocus
2023
CY2022Q4 us-gaap Cash And Cash Equivalents At Carrying Value
CashAndCashEquivalentsAtCarryingValue
732828000 usd
CY2021Q4 us-gaap Cash And Cash Equivalents At Carrying Value
CashAndCashEquivalentsAtCarryingValue
575812000 usd
CY2020Q4 us-gaap Cash And Cash Equivalents At Carrying Value
CashAndCashEquivalentsAtCarryingValue
554846000 usd
CY2022Q4 us-gaap Restricted Cash And Cash Equivalents At Carrying Value
RestrictedCashAndCashEquivalentsAtCarryingValue
49779000 usd
CY2021Q4 us-gaap Restricted Cash And Cash Equivalents At Carrying Value
RestrictedCashAndCashEquivalentsAtCarryingValue
46929000 usd
CY2020Q4 us-gaap Restricted Cash And Cash Equivalents At Carrying Value
RestrictedCashAndCashEquivalentsAtCarryingValue
45522000 usd
CY2022Q4 us-gaap Funds Held For Clients
FundsHeldForClients
34942000 usd
CY2021Q4 us-gaap Funds Held For Clients
FundsHeldForClients
31732000 usd
CY2020Q4 us-gaap Funds Held For Clients
FundsHeldForClients
0 usd
CY2022Q4 nsp Deposits Workers Compensation
DepositsWorkersCompensation
196370000 usd
CY2021Q4 nsp Deposits Workers Compensation
DepositsWorkersCompensation
185027000 usd
CY2020Q4 nsp Deposits Workers Compensation
DepositsWorkersCompensation
186331000 usd
CY2022Q4 us-gaap Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents
CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents
1013919000 usd
CY2021Q4 us-gaap Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents
CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents
839500000 usd
CY2020Q4 us-gaap Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents
CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents
786699000 usd
CY2023Q4 us-gaap Cash And Cash Equivalents At Carrying Value
CashAndCashEquivalentsAtCarryingValue
692873000 usd
CY2022Q4 us-gaap Cash And Cash Equivalents At Carrying Value
CashAndCashEquivalentsAtCarryingValue
732828000 usd
CY2023Q4 us-gaap Restricted Cash And Cash Equivalents At Carrying Value
RestrictedCashAndCashEquivalentsAtCarryingValue
57403000 usd
CY2022Q4 us-gaap Restricted Cash And Cash Equivalents At Carrying Value
RestrictedCashAndCashEquivalentsAtCarryingValue
49779000 usd
CY2023Q4 us-gaap Funds Held For Clients
FundsHeldForClients
87219000 usd
CY2022Q4 us-gaap Funds Held For Clients
FundsHeldForClients
34942000 usd
CY2023Q4 nsp Deposits Workers Compensation
DepositsWorkersCompensation
198170000 usd
CY2022Q4 nsp Deposits Workers Compensation
DepositsWorkersCompensation
196370000 usd
CY2023Q4 us-gaap Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents
CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents
1035665000 usd
CY2022Q4 us-gaap Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents
CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents
1013919000 usd
CY2023 dei Document Fiscal Year Focus
DocumentFiscalYearFocus
2023
CY2023 dei Document Type
DocumentType
10-K
CY2023Q4 us-gaap Other Cash Equivalents At Carrying Value
OtherCashEquivalentsAtCarryingValue
0 usd
CY2022Q4 us-gaap Other Cash Equivalents At Carrying Value
OtherCashEquivalentsAtCarryingValue
0 usd
CY2022Q4 us-gaap Unbilled Contracts Receivable
UnbilledContractsReceivable
123849000 usd
CY2023Q4 nsp Client Prepayments Included In Cash Balance
ClientPrepaymentsIncludedInCashBalance
27592000 usd
CY2022Q4 nsp Client Prepayments Included In Cash Balance
ClientPrepaymentsIncludedInCashBalance
36800000 usd
CY2023Q4 nsp Unbilled
Unbilled
668920000 usd
CY2022Q4 nsp Unbilled
Unbilled
600446000 usd
CY2023 dei Document Fiscal Year Focus
DocumentFiscalYearFocus
2023
CY2023 dei Document Type
DocumentType
10-K
CY2023 dei Document Fiscal Year Focus
DocumentFiscalYearFocus
2023
CY2023Q4 us-gaap Accounts Receivable Net Current
AccountsReceivableNetCurrent
15772000 usd
CY2022Q4 us-gaap Accounts Receivable Net Current
AccountsReceivableNetCurrent
13934000 usd
CY2023Q4 nsp Unbilled
Unbilled
668920000 usd
CY2022Q4 nsp Unbilled
Unbilled
600446000 usd
CY2023Q4 us-gaap Other Receivables
OtherReceivables
9186000 usd
CY2022Q4 us-gaap Other Receivables
OtherReceivables
8384000 usd
CY2023Q4 us-gaap Receivables Net Current
ReceivablesNetCurrent
693878000 usd
CY2022Q4 us-gaap Receivables Net Current
ReceivablesNetCurrent
622764000 usd
CY2023Q4 us-gaap Allowance For Doubtful Accounts Receivable Current
AllowanceForDoubtfulAccountsReceivableCurrent
1100000 usd
CY2022Q4 us-gaap Allowance For Doubtful Accounts Receivable Current
AllowanceForDoubtfulAccountsReceivableCurrent
1000000 usd
CY2023 dei Document Fiscal Year Focus
DocumentFiscalYearFocus
2023
CY2023Q4 nsp Unbilled Accrued Worksite Employee Payroll Costs
UnbilledAccruedWorksiteEmployeePayrollCosts
559194000 usd
CY2022Q4 nsp Unbilled Accrued Worksite Employee Payroll Costs
UnbilledAccruedWorksiteEmployeePayrollCosts
513397000 usd
CY2023Q4 us-gaap Unbilled Contracts Receivable
UnbilledContractsReceivable
137318000 usd
CY2023 dei Document Fiscal Year Focus
DocumentFiscalYearFocus
2023
CY2023Q4 nsp Prepaid Health Insurance
PrepaidHealthInsurance
9000000 usd
CY2022Q4 nsp Prepaid Health Insurance
PrepaidHealthInsurance
9000000 usd
CY2023Q4 nsp Deposits Health Insurance
DepositsHealthInsurance
7900000 usd
CY2022Q4 nsp Deposits Health Insurance
DepositsHealthInsurance
7900000 usd
CY2023Q4 nsp Deposits Workers Compensation
DepositsWorkersCompensation
198170000 usd
CY2022Q4 nsp Deposits Workers Compensation
DepositsWorkersCompensation
196370000 usd
CY2023Q4 nsp Deposit And Prepaid Health Insurance
DepositAndPrepaidHealthInsurance
215070000 usd
CY2022Q4 nsp Deposit And Prepaid Health Insurance
DepositAndPrepaidHealthInsurance
213270000 usd
CY2023 dei Document Fiscal Year Focus
DocumentFiscalYearFocus
2023
CY2023 dei Document Type
DocumentType
10-K
CY2023Q4 nsp Prepaid Health Insurance
PrepaidHealthInsurance
9000000 usd
CY2023Q4 us-gaap Line Of Credit Facility Current Borrowing Capacity
LineOfCreditFacilityCurrentBorrowingCapacity
650000000 usd
CY2023Q4 us-gaap Line Of Credit Facility Maximum Borrowing Capacity
LineOfCreditFacilityMaximumBorrowingCapacity
700000000 usd
CY2023 nsp Percentage Of Subsidiary Stock Securing Debt
PercentageOfSubsidiaryStockSecuringDebt
1 conversionratio
CY2023Q4 us-gaap Long Term Debt Noncurrent
LongTermDebtNoncurrent
369400000 usd
CY2023Q4 us-gaap Letters Of Credit Outstanding Amount
LettersOfCreditOutstandingAmount
1000000 usd
CY2023Q4 us-gaap Line Of Credit Facility Remaining Borrowing Capacity
LineOfCreditFacilityRemainingBorrowingCapacity
279600000 usd
CY2023Q4 us-gaap Long Term Debt Maturity Date
LongTermDebtMaturityDate
2027-06-30
CY2023Q4 nsp Applicable Margin Federal Funds Rate
ApplicableMarginFederalFundsRate
0.0050
CY2023Q4 nsp Adjusted Term Sofr Rate Plus Applicable Margin
AdjustedTermSOFRRatePlusApplicableMargin
0.0200
CY2023 us-gaap Line Of Credit Facility Unused Capacity Commitment Fee Percentage
LineOfCreditFacilityUnusedCapacityCommitmentFeePercentage
0.0025
CY2023 us-gaap Line Of Credit Facility Interest Rate During Period
LineOfCreditFacilityInterestRateDuringPeriod
0.0688
CY2023 dei Document Fiscal Year Focus
DocumentFiscalYearFocus
2023
CY2023 dei Document Type
DocumentType
10-K
CY2023 dei Document Fiscal Year Focus
DocumentFiscalYearFocus
2023
CY2023Q4 us-gaap Deferred Tax Liabilities Deferred Expense
DeferredTaxLiabilitiesDeferredExpense
4191000 usd
CY2022Q4 us-gaap Deferred Tax Liabilities Deferred Expense
DeferredTaxLiabilitiesDeferredExpense
5395000 usd
CY2023Q4 us-gaap Deferred Tax Liabilities Property Plant And Equipment
DeferredTaxLiabilitiesPropertyPlantAndEquipment
6477000 usd
CY2022Q4 us-gaap Deferred Tax Liabilities Property Plant And Equipment
DeferredTaxLiabilitiesPropertyPlantAndEquipment
7448000 usd
CY2023Q4 us-gaap Deferred Tax Liabilities Deferred Expense Capitalized Software
DeferredTaxLiabilitiesDeferredExpenseCapitalizedSoftware
0 usd
CY2022Q4 us-gaap Deferred Tax Liabilities Deferred Expense Capitalized Software
DeferredTaxLiabilitiesDeferredExpenseCapitalizedSoftware
2598000 usd
CY2023Q4 us-gaap Deferred Tax Liabilities Other
DeferredTaxLiabilitiesOther
3380000 usd
CY2022Q4 us-gaap Deferred Tax Liabilities Other
DeferredTaxLiabilitiesOther
3139000 usd
CY2023Q4 us-gaap Deferred Tax Liabilities Leasing Arrangements
DeferredTaxLiabilitiesLeasingArrangements
16624000 usd
CY2022Q4 us-gaap Deferred Tax Liabilities Leasing Arrangements
DeferredTaxLiabilitiesLeasingArrangements
16371000 usd
CY2023Q4 us-gaap Deferred Tax Liabilities Goodwill And Intangible Assets
DeferredTaxLiabilitiesGoodwillAndIntangibleAssets
2595000 usd
CY2022Q4 us-gaap Deferred Tax Liabilities Goodwill And Intangible Assets
DeferredTaxLiabilitiesGoodwillAndIntangibleAssets
2247000 usd
CY2023Q4 us-gaap Deferred Tax Liabilities
DeferredTaxLiabilities
33267000 usd
CY2022Q4 us-gaap Deferred Tax Liabilities
DeferredTaxLiabilities
37198000 usd
CY2023Q4 us-gaap Deferred Tax Assets Tax Deferred Expense Compensation And Benefits Employee Bonuses
DeferredTaxAssetsTaxDeferredExpenseCompensationAndBenefitsEmployeeBonuses
8553000 usd
CY2022Q4 us-gaap Deferred Tax Assets Tax Deferred Expense Compensation And Benefits Employee Bonuses
DeferredTaxAssetsTaxDeferredExpenseCompensationAndBenefitsEmployeeBonuses
13116000 usd
CY2023Q4 us-gaap Deferred Tax Assets Operating Loss Carryforwards
DeferredTaxAssetsOperatingLossCarryforwards
332000 usd
CY2022Q4 us-gaap Deferred Tax Assets Operating Loss Carryforwards
DeferredTaxAssetsOperatingLossCarryforwards
407000 usd
CY2023Q4 us-gaap Deferred Tax Assets Tax Deferred Expense Reserves And Accruals Self Insurance
DeferredTaxAssetsTaxDeferredExpenseReservesAndAccrualsSelfInsurance
4588000 usd
CY2022Q4 us-gaap Deferred Tax Assets Tax Deferred Expense Reserves And Accruals Self Insurance
DeferredTaxAssetsTaxDeferredExpenseReservesAndAccrualsSelfInsurance
5358000 usd
CY2023Q4 us-gaap Deferred Tax Assets Tax Deferred Expense Reserves And Accruals Deferred Rent
DeferredTaxAssetsTaxDeferredExpenseReservesAndAccrualsDeferredRent
1781000 usd
CY2022Q4 us-gaap Deferred Tax Assets Tax Deferred Expense Reserves And Accruals Deferred Rent
DeferredTaxAssetsTaxDeferredExpenseReservesAndAccrualsDeferredRent
1790000 usd
CY2023Q4 nsp Deferred Tax Assets Tax Deferred Expenses Capitalized Software
DeferredTaxAssetsTaxDeferredExpensesCapitalizedSoftware
3717000 usd
CY2022Q4 nsp Deferred Tax Assets Tax Deferred Expenses Capitalized Software
DeferredTaxAssetsTaxDeferredExpensesCapitalizedSoftware
0 usd
CY2023Q4 us-gaap Deferred Tax Assets Tax Deferred Expense Compensation And Benefits Share Based Compensation Cost
DeferredTaxAssetsTaxDeferredExpenseCompensationAndBenefitsShareBasedCompensationCost
14332000 usd
CY2022Q4 us-gaap Deferred Tax Assets Tax Deferred Expense Compensation And Benefits Share Based Compensation Cost
DeferredTaxAssetsTaxDeferredExpenseCompensationAndBenefitsShareBasedCompensationCost
12255000 usd
CY2023Q4 nsp Deferred Tax Assets Operating Lease Liabilities
DeferredTaxAssetsOperatingLeaseLiabilities
20007000 usd
CY2022Q4 nsp Deferred Tax Assets Operating Lease Liabilities
DeferredTaxAssetsOperatingLeaseLiabilities
19508000 usd
CY2023Q4 us-gaap Deferred Tax Assets Tax Deferred Expense Other
DeferredTaxAssetsTaxDeferredExpenseOther
1010000 usd
CY2022Q4 us-gaap Deferred Tax Assets Tax Deferred Expense Other
DeferredTaxAssetsTaxDeferredExpenseOther
972000 usd
CY2023Q4 us-gaap Deferred Tax Assets Gross
DeferredTaxAssetsGross
54320000 usd
CY2022Q4 us-gaap Deferred Tax Assets Gross
DeferredTaxAssetsGross
53406000 usd
CY2023Q4 us-gaap Deferred Tax Assets Valuation Allowance
DeferredTaxAssetsValuationAllowance
706000 usd
CY2022Q4 us-gaap Deferred Tax Assets Valuation Allowance
DeferredTaxAssetsValuationAllowance
675000 usd
CY2023Q4 us-gaap Deferred Tax Assets Net
DeferredTaxAssetsNet
53614000 usd
CY2022Q4 us-gaap Deferred Tax Assets Net
DeferredTaxAssetsNet
52731000 usd
CY2023Q4 us-gaap Deferred Tax Assets Liabilities Net
DeferredTaxAssetsLiabilitiesNet
20347000 usd
CY2022Q4 us-gaap Deferred Tax Assets Liabilities Net
DeferredTaxAssetsLiabilitiesNet
15533000 usd
CY2023 dei Document Fiscal Year Focus
DocumentFiscalYearFocus
2023
CY2023 dei Document Type
DocumentType
10-K
CY2023 dei Document Fiscal Year Focus
DocumentFiscalYearFocus
2023
CY2023 us-gaap Current Federal Tax Expense Benefit
CurrentFederalTaxExpenseBenefit
49058000 usd
CY2022 us-gaap Current Federal Tax Expense Benefit
CurrentFederalTaxExpenseBenefit
61649000 usd
CY2021 us-gaap Current Federal Tax Expense Benefit
CurrentFederalTaxExpenseBenefit
30887000 usd
CY2023 us-gaap Current State And Local Tax Expense Benefit
CurrentStateAndLocalTaxExpenseBenefit
9452000 usd
CY2022 us-gaap Current State And Local Tax Expense Benefit
CurrentStateAndLocalTaxExpenseBenefit
15067000 usd
CY2021 us-gaap Current State And Local Tax Expense Benefit
CurrentStateAndLocalTaxExpenseBenefit
8640000 usd
CY2023 us-gaap Current Income Tax Expense Benefit
CurrentIncomeTaxExpenseBenefit
58510000 usd
CY2022 us-gaap Current Income Tax Expense Benefit
CurrentIncomeTaxExpenseBenefit
76716000 usd
CY2021 us-gaap Current Income Tax Expense Benefit
CurrentIncomeTaxExpenseBenefit
39527000 usd
CY2023 us-gaap Deferred Federal Income Tax Expense Benefit
DeferredFederalIncomeTaxExpenseBenefit
-3887000 usd
CY2022 us-gaap Deferred Federal Income Tax Expense Benefit
DeferredFederalIncomeTaxExpenseBenefit
-8844000 usd
CY2021 us-gaap Deferred Federal Income Tax Expense Benefit
DeferredFederalIncomeTaxExpenseBenefit
4562000 usd
CY2023 us-gaap Deferred State And Local Income Tax Expense Benefit
DeferredStateAndLocalIncomeTaxExpenseBenefit
-927000 usd
CY2022 us-gaap Deferred State And Local Income Tax Expense Benefit
DeferredStateAndLocalIncomeTaxExpenseBenefit
-1797000 usd
CY2021 us-gaap Deferred State And Local Income Tax Expense Benefit
DeferredStateAndLocalIncomeTaxExpenseBenefit
149000 usd
CY2023 us-gaap Deferred Income Tax Expense Benefit
DeferredIncomeTaxExpenseBenefit
-4814000 usd
CY2022 us-gaap Deferred Income Tax Expense Benefit
DeferredIncomeTaxExpenseBenefit
-10641000 usd
CY2021 us-gaap Deferred Income Tax Expense Benefit
DeferredIncomeTaxExpenseBenefit
4711000 usd
CY2023 us-gaap Income Tax Expense Benefit
IncomeTaxExpenseBenefit
53696000 usd
CY2022 us-gaap Income Tax Expense Benefit
IncomeTaxExpenseBenefit
66075000 usd
CY2021 us-gaap Income Tax Expense Benefit
IncomeTaxExpenseBenefit
44238000 usd
CY2023 dei Document Fiscal Year Focus
DocumentFiscalYearFocus
2023
CY2023 us-gaap Effective Income Tax Rate Reconciliation At Federal Statutory Income Tax Rate
EffectiveIncomeTaxRateReconciliationAtFederalStatutoryIncomeTaxRate
0.21
CY2023 us-gaap Income Tax Reconciliation Income Tax Expense Benefit At Federal Statutory Income Tax Rate
IncomeTaxReconciliationIncomeTaxExpenseBenefitAtFederalStatutoryIncomeTaxRate
47266000 usd
CY2022 us-gaap Income Tax Reconciliation Income Tax Expense Benefit At Federal Statutory Income Tax Rate
IncomeTaxReconciliationIncomeTaxExpenseBenefitAtFederalStatutoryIncomeTaxRate
51539000 usd
CY2021 us-gaap Income Tax Reconciliation Income Tax Expense Benefit At Federal Statutory Income Tax Rate
IncomeTaxReconciliationIncomeTaxExpenseBenefitAtFederalStatutoryIncomeTaxRate
35347000 usd
CY2023 us-gaap Income Tax Reconciliation State And Local Income Taxes
IncomeTaxReconciliationStateAndLocalIncomeTaxes
6540000 usd
CY2022 us-gaap Income Tax Reconciliation State And Local Income Taxes
IncomeTaxReconciliationStateAndLocalIncomeTaxes
10106000 usd
CY2021 us-gaap Income Tax Reconciliation State And Local Income Taxes
IncomeTaxReconciliationStateAndLocalIncomeTaxes
6974000 usd
CY2023 us-gaap Income Tax Reconciliation Nondeductible Expense
IncomeTaxReconciliationNondeductibleExpense
5455000 usd
CY2022 us-gaap Income Tax Reconciliation Nondeductible Expense
IncomeTaxReconciliationNondeductibleExpense
4338000 usd
CY2021 us-gaap Income Tax Reconciliation Nondeductible Expense
IncomeTaxReconciliationNondeductibleExpense
7362000 usd
CY2023 us-gaap Income Tax Reconciliation Nondeductible Expense Share Based Compensation Cost
IncomeTaxReconciliationNondeductibleExpenseShareBasedCompensationCost
-4386000 usd
CY2022 us-gaap Income Tax Reconciliation Nondeductible Expense Share Based Compensation Cost
IncomeTaxReconciliationNondeductibleExpenseShareBasedCompensationCost
1345000 usd
CY2021 us-gaap Income Tax Reconciliation Nondeductible Expense Share Based Compensation Cost
IncomeTaxReconciliationNondeductibleExpenseShareBasedCompensationCost
-4427000 usd
CY2023 us-gaap Income Tax Reconciliation Tax Credits Research
IncomeTaxReconciliationTaxCreditsResearch
1183000 usd
CY2022 us-gaap Income Tax Reconciliation Tax Credits Research
IncomeTaxReconciliationTaxCreditsResearch
1241000 usd
CY2021 us-gaap Income Tax Reconciliation Tax Credits Research
IncomeTaxReconciliationTaxCreditsResearch
1018000 usd
CY2023 us-gaap Income Tax Reconciliation Other Adjustments
IncomeTaxReconciliationOtherAdjustments
4000 usd
CY2022 us-gaap Income Tax Reconciliation Other Adjustments
IncomeTaxReconciliationOtherAdjustments
-12000 usd
CY2021 us-gaap Income Tax Reconciliation Other Adjustments
IncomeTaxReconciliationOtherAdjustments
0 usd
CY2023 us-gaap Income Tax Expense Benefit
IncomeTaxExpenseBenefit
53696000 usd
CY2022 us-gaap Income Tax Expense Benefit
IncomeTaxExpenseBenefit
66075000 usd
CY2021 us-gaap Income Tax Expense Benefit
IncomeTaxExpenseBenefit
44238000 usd
CY2022 us-gaap Unrecognized Tax Benefits Period Increase Decrease
UnrecognizedTaxBenefitsPeriodIncreaseDecrease
0 usd
CY2021 us-gaap Unrecognized Tax Benefits Period Increase Decrease
UnrecognizedTaxBenefitsPeriodIncreaseDecrease
0 usd
CY2023 us-gaap Unrecognized Tax Benefits Period Increase Decrease
UnrecognizedTaxBenefitsPeriodIncreaseDecrease
0 usd
CY2023 nsp Aggregatenumberofsharesrepurchasedduringtheperiod
Aggregatenumberofsharesrepurchasedduringtheperiod
1259109 shares
CY2023 us-gaap Treasury Stock Shares Acquired
TreasuryStockSharesAcquired
1062598 shares
CY2023Q4 us-gaap Stock Repurchase Program Number Of Shares Authorized To Be Repurchased
StockRepurchaseProgramNumberOfSharesAuthorizedToBeRepurchased
2000000 shares
CY2023Q4 us-gaap Stock Repurchase Program Remaining Number Of Shares Authorized To Be Repurchased
StockRepurchaseProgramRemainingNumberOfSharesAuthorizedToBeRepurchased
1969562 shares
CY2023 dei Document Fiscal Year Focus
DocumentFiscalYearFocus
2023
CY2023 dei Document Type
DocumentType
10-K
CY2023 us-gaap Shares Paid For Tax Withholding For Share Based Compensation
SharesPaidForTaxWithholdingForShareBasedCompensation
196511 shares
CY2023 dei Document Fiscal Year Focus
DocumentFiscalYearFocus
2023
CY2023Q1 us-gaap Common Stock Dividends Per Share Declared
CommonStockDividendsPerShareDeclared
0.52
CY2022Q1 us-gaap Common Stock Dividends Per Share Declared
CommonStockDividendsPerShareDeclared
0.45
CY2023Q3 us-gaap Common Stock Dividends Per Share Declared
CommonStockDividendsPerShareDeclared
0.57
CY2022Q2 us-gaap Common Stock Dividends Per Share Declared
CommonStockDividendsPerShareDeclared
0.52
CY2023Q3 us-gaap Common Stock Dividends Per Share Declared
CommonStockDividendsPerShareDeclared
0.57
CY2022Q4 us-gaap Common Stock Dividends Per Share Declared
CommonStockDividendsPerShareDeclared
0.52
CY2023Q4 us-gaap Common Stock Dividends Per Share Declared
CommonStockDividendsPerShareDeclared
0.57
CY2022Q4 us-gaap Common Stock Dividends Per Share Declared
CommonStockDividendsPerShareDeclared
0.52
CY2023 us-gaap Payments Of Dividends Common Stock
PaymentsOfDividendsCommonStock
84200000 usd
CY2022 us-gaap Payments Of Dividends Common Stock
PaymentsOfDividendsCommonStock
76600000 usd
CY2023Q4 us-gaap Share Based Compensation Arrangement By Share Based Payment Award Number Of Shares Available For Grant
ShareBasedCompensationArrangementByShareBasedPaymentAwardNumberOfSharesAvailableForGrant
1837540 shares
CY2023 dei Document Fiscal Year Focus
DocumentFiscalYearFocus
2023
CY2023 dei Document Fiscal Year Focus
DocumentFiscalYearFocus
2023
CY2023 dei Document Type
DocumentType
10-K
CY2023 dei Document Fiscal Year Focus
DocumentFiscalYearFocus
2023
CY2023 us-gaap Allocated Share Based Compensation Expense
AllocatedShareBasedCompensationExpense
52996000 usd
CY2022 us-gaap Allocated Share Based Compensation Expense
AllocatedShareBasedCompensationExpense
50080000 usd
CY2021 us-gaap Allocated Share Based Compensation Expense
AllocatedShareBasedCompensationExpense
40623000 usd
CY2023 us-gaap Employee Service Share Based Compensation Tax Benefit From Compensation Expense
EmployeeServiceShareBasedCompensationTaxBenefitFromCompensationExpense
12643000 usd
CY2022 us-gaap Employee Service Share Based Compensation Tax Benefit From Compensation Expense
EmployeeServiceShareBasedCompensationTaxBenefitFromCompensationExpense
13483000 usd
CY2021 us-gaap Employee Service Share Based Compensation Tax Benefit From Compensation Expense
EmployeeServiceShareBasedCompensationTaxBenefitFromCompensationExpense
10677000 usd
CY2023 dei Document Fiscal Year Focus
DocumentFiscalYearFocus
2023
CY2023 dei Document Fiscal Year Focus
DocumentFiscalYearFocus
2023
CY2023Q4 us-gaap Employee Service Share Based Compensation Nonvested Awards Total Compensation Cost Not Yet Recognized
EmployeeServiceShareBasedCompensationNonvestedAwardsTotalCompensationCostNotYetRecognized
59300000 usd
CY2023 us-gaap Employee Service Share Based Compensation Nonvested Awards Total Compensation Cost Not Yet Recognized Period For Recognition1
EmployeeServiceShareBasedCompensationNonvestedAwardsTotalCompensationCostNotYetRecognizedPeriodForRecognition1
P22M
CY2023 dei Document Fiscal Year Focus
DocumentFiscalYearFocus
2023
CY2023 dei Document Type
DocumentType
10-K
CY2023 dei Document Fiscal Year Focus
DocumentFiscalYearFocus
2023
CY2023 dei Document Fiscal Year Focus
DocumentFiscalYearFocus
2023
CY2023 us-gaap Share Based Compensation Arrangement By Share Based Payment Award Discount From Market Price Offering Date
ShareBasedCompensationArrangementByShareBasedPaymentAwardDiscountFromMarketPriceOfferingDate
5
CY2023 us-gaap Stock Issued During Period Shares Employee Stock Purchase Plans
StockIssuedDuringPeriodSharesEmployeeStockPurchasePlans
39000 shares
CY2022 us-gaap Stock Issued During Period Shares Employee Stock Purchase Plans
StockIssuedDuringPeriodSharesEmployeeStockPurchasePlans
36000 shares
CY2021 us-gaap Stock Issued During Period Shares Employee Stock Purchase Plans
StockIssuedDuringPeriodSharesEmployeeStockPurchasePlans
36000 shares
CY2023 dei Document Fiscal Year Focus
DocumentFiscalYearFocus
2023
CY2023 dei Document Fiscal Year Focus
DocumentFiscalYearFocus
2023
CY2023 us-gaap Net Income Loss
NetIncomeLoss
171382000 usd
CY2022 us-gaap Net Income Loss
NetIncomeLoss
179350000 usd
CY2021 us-gaap Net Income Loss
NetIncomeLoss
124080000 usd
CY2023 us-gaap Weighted Average Number Of Shares Outstanding Basic
WeightedAverageNumberOfSharesOutstandingBasic
37807000 shares
CY2022 us-gaap Weighted Average Number Of Shares Outstanding Basic
WeightedAverageNumberOfSharesOutstandingBasic
38115000 shares
CY2021 us-gaap Weighted Average Number Of Shares Outstanding Basic
WeightedAverageNumberOfSharesOutstandingBasic
38431000 shares
CY2023 us-gaap Incremental Common Shares Attributable To Share Based Payment Arrangements
IncrementalCommonSharesAttributableToShareBasedPaymentArrangements
535000 shares
CY2022 us-gaap Incremental Common Shares Attributable To Share Based Payment Arrangements
IncrementalCommonSharesAttributableToShareBasedPaymentArrangements
501000 shares
CY2021 us-gaap Incremental Common Shares Attributable To Share Based Payment Arrangements
IncrementalCommonSharesAttributableToShareBasedPaymentArrangements
471000 shares
CY2023 us-gaap Weighted Average Number Of Diluted Shares Outstanding
WeightedAverageNumberOfDilutedSharesOutstanding
38342000 shares
CY2022 us-gaap Weighted Average Number Of Diluted Shares Outstanding
WeightedAverageNumberOfDilutedSharesOutstanding
38616000 shares
CY2021 us-gaap Weighted Average Number Of Diluted Shares Outstanding
WeightedAverageNumberOfDilutedSharesOutstanding
38902000 shares
CY2023 us-gaap Antidilutive Securities Excluded From Computation Of Earnings Per Share Amount
AntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareAmount
6000 shares
CY2022 us-gaap Antidilutive Securities Excluded From Computation Of Earnings Per Share Amount
AntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareAmount
10000 shares
CY2021 us-gaap Antidilutive Securities Excluded From Computation Of Earnings Per Share Amount
AntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareAmount
0 shares
CY2023 dei Document Fiscal Year Focus
DocumentFiscalYearFocus
2023
CY2023 dei Document Type
DocumentType
10-K
CY2023 dei Document Fiscal Year Focus
DocumentFiscalYearFocus
2023
CY2023 us-gaap Operating Lease Expense
OperatingLeaseExpense
19500000 usd
CY2022 us-gaap Operating Lease Expense
OperatingLeaseExpense
18700000 usd
CY2021 us-gaap Operating Lease Expense
OperatingLeaseExpense
18200000 usd
CY2023 dei Document Fiscal Year Focus
DocumentFiscalYearFocus
2023
CY2023 us-gaap Operating Lease Payments
OperatingLeasePayments
22900000 usd
CY2023Q4 us-gaap Operating Lease Liability Current
OperatingLeaseLiabilityCurrent
19816000 usd
CY2023Q4 us-gaap Operating Lease Liability Noncurrent
OperatingLeaseLiabilityNoncurrent
57494000 usd
CY2023Q4 us-gaap Operating Lease Liability
OperatingLeaseLiability
77310000 usd
CY2023Q4 nsp Landlord Funded Tenant Improvements
LandlordFundedTenantImprovements
13004000 usd
CY2023Q4 us-gaap Deferred Rent Credit Noncurrent
DeferredRentCreditNoncurrent
6868000 usd
CY2023Q4 us-gaap Operating Lease Right Of Use Asset
OperatingLeaseRightOfUseAsset
57438000 usd
CY2023Q4 us-gaap Operating Lease Weighted Average Remaining Lease Term1
OperatingLeaseWeightedAverageRemainingLeaseTerm1
P5Y
CY2023Q4 us-gaap Operating Lease Weighted Average Discount Rate Percent
OperatingLeaseWeightedAverageDiscountRatePercent
0.042
CY2023 dei Document Fiscal Year Focus
DocumentFiscalYearFocus
2023
CY2023Q4 us-gaap Lessee Operating Lease Liability Payments Due Next Twelve Months
LesseeOperatingLeaseLiabilityPaymentsDueNextTwelveMonths
22604000 usd
CY2023Q4 us-gaap Lessee Operating Lease Liability Payments Due Year Two
LesseeOperatingLeaseLiabilityPaymentsDueYearTwo
18915000 usd
CY2023Q4 us-gaap Lessee Operating Lease Liability Payments Due Year Three
LesseeOperatingLeaseLiabilityPaymentsDueYearThree
15317000 usd
CY2023Q4 us-gaap Lessee Operating Lease Liability Payments Due Year Four
LesseeOperatingLeaseLiabilityPaymentsDueYearFour
12679000 usd
CY2023Q4 us-gaap Lessee Operating Lease Liability Payments Due Year Five
LesseeOperatingLeaseLiabilityPaymentsDueYearFive
8841000 usd
CY2023Q4 us-gaap Lessee Operating Lease Liability Payments Due After Year Five
LesseeOperatingLeaseLiabilityPaymentsDueAfterYearFive
7152000 usd
CY2023Q4 us-gaap Lessee Operating Lease Liability Payments Due
LesseeOperatingLeaseLiabilityPaymentsDue
85508000 usd
CY2023Q4 us-gaap Lessee Operating Lease Liability Undiscounted Excess Amount
LesseeOperatingLeaseLiabilityUndiscountedExcessAmount
8198000 usd
CY2023Q4 us-gaap Operating Lease Liability
OperatingLeaseLiability
77310000 usd
CY2023 dei Document Fiscal Year Focus
DocumentFiscalYearFocus
2023
CY2023Q4 us-gaap Lessor Operating Lease Lease Not Yet Commenced Assumption And Judgment Value Of Underlying Asset Amount
LessorOperatingLeaseLeaseNotYetCommencedAssumptionAndJudgmentValueOfUnderlyingAssetAmount
29700000 usd
CY2023 dei Document Fiscal Year Focus
DocumentFiscalYearFocus
2023
CY2023 dei Document Type
DocumentType
10-K
CY2023Q4 us-gaap Unrecorded Unconditional Purchase Obligation Balance On First Anniversary
UnrecordedUnconditionalPurchaseObligationBalanceOnFirstAnniversary
33472000 usd
CY2023Q4 us-gaap Unrecorded Unconditional Purchase Obligation Balance On Second Anniversary
UnrecordedUnconditionalPurchaseObligationBalanceOnSecondAnniversary
21622000 usd
CY2023Q4 us-gaap Unrecorded Unconditional Purchase Obligation Balance On Third Anniversary
UnrecordedUnconditionalPurchaseObligationBalanceOnThirdAnniversary
7552000 usd
CY2023Q4 us-gaap Unrecorded Unconditional Purchase Obligation Balance On Fourth Anniversary
UnrecordedUnconditionalPurchaseObligationBalanceOnFourthAnniversary
3113000 usd
CY2023Q4 us-gaap Unrecorded Unconditional Purchase Obligation Balance On Fifth Anniversary
UnrecordedUnconditionalPurchaseObligationBalanceOnFifthAnniversary
3159000 usd
CY2023Q4 us-gaap Unrecorded Unconditional Purchase Obligation Due After Five Years
UnrecordedUnconditionalPurchaseObligationDueAfterFiveYears
0 usd
CY2023Q4 us-gaap Unrecorded Unconditional Purchase Obligation Balance Sheet Amount
UnrecordedUnconditionalPurchaseObligationBalanceSheetAmount
68918000 usd
CY2023 dei Document Fiscal Year Focus
DocumentFiscalYearFocus
2023
CY2023 dei Document Type
DocumentType
10-K

Files In Submission

Name View Source Status
0001000753-24-000012-index-headers.html Edgar Link pending
0001000753-24-000012-index.html Edgar Link pending
0001000753-24-000012.txt Edgar Link pending
0001000753-24-000012-xbrl.zip Edgar Link pending
a12312023nsp-ex1023ltip_ar.htm Edgar Link pending
a12312023nsp-ex105officerr.htm Edgar Link pending
a12312023nsp-ex106l1819rsu.htm Edgar Link pending
a12312023nsp-ex107employee.htm Edgar Link pending
a12312023nsp-ex109ltipawar.htm Edgar Link pending
a12312023nsp-ex211xsubsidi.htm Edgar Link pending
a12312023nsp-ex231xconsent.htm Edgar Link pending
a12312023nsp-ex241xpoas.htm Edgar Link pending
a12312023nsp-ex311.htm Edgar Link pending
a12312023nsp-ex312.htm Edgar Link pending
a12312023nsp-ex321.htm Edgar Link pending
a12312023nsp-ex322.htm Edgar Link pending
a12312023nsp-ex97clawbackp.htm Edgar Link pending
Financial_Report.xlsx Edgar Link pending
MetaLinks.json Edgar Link pending
nsp-20231231.htm Edgar Link pending
nsp-20231231.xsd Edgar Link pending
nsp-20231231_g1.jpg Edgar Link pending
nsp-20231231_g10.jpg Edgar Link pending
nsp-20231231_g11.jpg Edgar Link pending
nsp-20231231_g12.jpg Edgar Link pending
nsp-20231231_g13.jpg Edgar Link pending
nsp-20231231_g14.jpg Edgar Link pending
nsp-20231231_g15.jpg Edgar Link pending
nsp-20231231_g16.jpg Edgar Link pending
nsp-20231231_g2.jpg Edgar Link pending
nsp-20231231_g3.jpg Edgar Link pending
nsp-20231231_g4.jpg Edgar Link pending
nsp-20231231_g5.jpg Edgar Link pending
nsp-20231231_g6.jpg Edgar Link pending
nsp-20231231_g7.jpg Edgar Link pending
nsp-20231231_g8.jpg Edgar Link pending
nsp-20231231_g9.jpg Edgar Link pending
R1.htm Edgar Link pending
R10.htm Edgar Link pending
R11.htm Edgar Link pending
R12.htm Edgar Link pending
R13.htm Edgar Link pending
R14.htm Edgar Link pending
R15.htm Edgar Link pending
R16.htm Edgar Link pending
R17.htm Edgar Link pending
R18.htm Edgar Link pending
R19.htm Edgar Link pending
R2.htm Edgar Link pending
R20.htm Edgar Link pending
R21.htm Edgar Link pending
R22.htm Edgar Link pending
R23.htm Edgar Link pending
R24.htm Edgar Link pending
R25.htm Edgar Link pending
R26.htm Edgar Link pending
R27.htm Edgar Link pending
R28.htm Edgar Link pending
R29.htm Edgar Link pending
R3.htm Edgar Link pending
R30.htm Edgar Link pending
R31.htm Edgar Link pending
R32.htm Edgar Link pending
R33.htm Edgar Link pending
nsp-20231231_cal.xml Edgar Link unprocessable
nsp-20231231_lab.xml Edgar Link unprocessable
nsp-20231231_pre.xml Edgar Link unprocessable
nsp-20231231_htm.xml Edgar Link completed
R34.htm Edgar Link pending
R35.htm Edgar Link pending
R36.htm Edgar Link pending
R37.htm Edgar Link pending
R38.htm Edgar Link pending
R39.htm Edgar Link pending
R4.htm Edgar Link pending
R40.htm Edgar Link pending
R41.htm Edgar Link pending
R42.htm Edgar Link pending
R43.htm Edgar Link pending
R44.htm Edgar Link pending
R45.htm Edgar Link pending
R5.htm Edgar Link pending
R6.htm Edgar Link pending
R7.htm Edgar Link pending
R8.htm Edgar Link pending
R9.htm Edgar Link pending
report.css Edgar Link pending
Show.js Edgar Link pending
FilingSummary.xml Edgar Link unprocessable
nsp-20231231_def.xml Edgar Link unprocessable