$NSP
INSPERITY, INC. Stock $nsp

$nsp Overview Financials Valuation SEC Filings Company Website

2021 Q4 Form 10-Q Financial Statement

#000100075321000044 Filed on November 02, 2021

Income Statement

Concept	2021 Q4	2021 Q3	2020 Q3
Revenue	$1.291B	$1.210B	$1.008B
YoY Change	22.24%	20.02%	-3.41%
Cost Of Revenue	$1.121B	$1.011B	$822.8M
YoY Change	26.08%	22.89%	-5.73%
Gross Profit	$170.6M	$198.5M	$185.0M
YoY Change	1.8%	7.27%	8.49%
Gross Profit Margin	13.21%	16.41%	18.36%
Selling, General & Admin	$145.1M	$149.0M	$148.4M
YoY Change	-4.53%	0.38%	15.49%
% of Gross Profit	85.05%	75.05%	80.2%
Research & Development
YoY Change
% of Gross Profit
Depreciation & Amortization	$10.83M	$9.917M	$7.800M
YoY Change	37.11%	27.14%	6.85%
% of Gross Profit	6.35%	5.0%	4.22%
Operating Expenses	$155.9M	$158.9M	$156.3M
YoY Change	-2.41%	1.67%	15.06%
Operating Profit	$14.68M	$39.60M	$28.77M
YoY Change	88.19%	37.64%	-17.16%
Interest Expense	-$1.704M	$1.963M	$1.731M
YoY Change	13.6%	13.4%	-18.43%
% of Operating Profit	-11.61%	4.96%	6.02%
Other Income/Expense, Net
YoY Change
Pretax Income	$12.98M	$37.89M	$27.14M
YoY Change	105.95%	39.59%	-22.85%
Income Tax	$3.267M	$10.60M	$7.135M
% Of Pretax Income	25.18%	27.96%	26.29%
Net Earnings	$9.708M	$27.30M	$20.01M
YoY Change	125.77%	36.42%	-22.62%
Net Earnings / Revenue	0.75%	2.26%	1.99%
Basic Earnings Per Share		$0.71	$0.52
Diluted Earnings Per Share	$248.5K	$0.70	$0.51
COMMON SHARES
Basic Shares Outstanding	38.50M shares	38.52M shares	38.51M shares
Diluted Shares Outstanding		38.88M shares	38.74M shares

Balance Sheet

Concept	2021 Q4	2021 Q3	2020 Q3
SHORT-TERM ASSETS
Cash & Short-Term Investments	$607.6M	$500.6M	$406.4M
YoY Change	3.09%	23.18%	33.55%
Cash & Equivalents	$575.8M	$467.9M	$372.4M
Short-Term Investments	$31.79M	$32.70M	$34.00M
Other Short-Term Assets	$53.31M	$53.29M	$33.77M
YoY Change	35.1%	57.8%	27.74%
Inventory
Prepaid Expenses
Receivables	$10.52M	$579.5M	$528.7M
Other Receivables	$24.66M	$5.584M	$0.00
Total Short-Term Assets	$1.245B	$1.206B	$1.049B
YoY Change	15.56%	15.03%	17.36%
LONG-TERM ASSETS
Property, Plant & Equipment	$210.7M	$212.3M	$196.2M
YoY Change	-2.56%	8.21%	45.39%
Goodwill	$12.70M
YoY Change	0.0%
Intangibles
YoY Change
Long-Term Investments
YoY Change
Other Assets	$15.16M	$12.09M	$6.291M
YoY Change	233.29%	92.23%	-6.55%
Total Long-Term Assets	$508.2M	$527.6M	$474.4M
YoY Change	0.24%	11.21%	19.09%
TOTAL ASSETS
Total Short-Term Assets	$1.245B	$1.206B	$1.049B
Total Long-Term Assets	$508.2M	$527.6M	$474.4M
Total Assets	$1.753B	$1.734B	$1.523B
YoY Change	10.66%	13.84%	17.89%
SHORT-TERM LIABILITIES
YoY Change
Accounts Payable	$6.412M	$4.250M	$6.016M
YoY Change	3.37%	-29.36%	11.97%
Accrued Expenses	$69.30M	$70.82M	$46.40M
YoY Change	14.03%	52.64%	9.99%
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	$1.129B	$1.004B	$841.1M
YoY Change	24.71%	19.39%	10.49%
LONG-TERM LIABILITIES
Long-Term Debt	$369.4M	$369.4M	$369.4M
YoY Change	0.0%	0.0%	54.3%
Other Long-Term Liabilities	$0.00	$263.5M	$269.4M
YoY Change	-100.0%	-2.2%
Total Long-Term Liabilities	$626.3M	$632.9M	$641.6M
YoY Change	-1.41%	-1.36%	30.95%
TOTAL LIABILITIES
Total Short-Term Liabilities	$1.129B	$1.004B	$841.1M
Total Long-Term Liabilities	$626.3M	$632.9M	$641.6M
Total Liabilities	$1.755B	$1.637B	$1.483B
YoY Change	13.94%	10.41%	18.5%
SHAREHOLDERS EQUITY
Retained Earnings	$553.6M	$637.9M	$586.1M
YoY Change	-3.73%	8.83%	19.39%
Common Stock	$109.7M	$105.1M	$75.15M
YoY Change	14.21%	39.9%	60.05%
Preferred Stock
YoY Change
Treasury Stock (at cost)	$665.1M	$646.0M	$620.6M
YoY Change	6.08%	4.09%	24.9%
Treasury Stock Shares	17.16M shares
Shareholders Equity	-$1.774M	$97.01M	$40.64M
YoY Change
Total Liabilities & Shareholders Equity	$1.753B	$1.734B	$1.523B
YoY Change	10.66%	13.84%	17.89%

Cashflow Statement

Concept	2021 Q4	2021 Q3	2020 Q3
OPERATING ACTIVITIES
Net Income	$9.708M	$27.30M	$20.01M
YoY Change	125.77%	36.42%	-22.62%
Depreciation, Depletion And Amortization	$10.83M	$9.917M	$7.800M
YoY Change	37.11%	27.14%	6.85%
Cash From Operating Activities	$205.3M	$47.85M	-$8.300M
YoY Change	-14.38%	-676.48%	-67.19%
INVESTING ACTIVITIES
Capital Expenditures	-$9.304M	-$2.895M	-$29.30M
YoY Change	-68.35%	-90.12%	55.85%
Acquisitions
YoY Change
Other Investing Activities	$707.0K	$1.709M	-$2.400M
YoY Change	-188.38%	-171.21%	-700.0%
Cash From Investing Activities	-$8.597M	-$1.186M	-$31.60M
YoY Change	-71.53%	-96.25%	71.74%
FINANCING ACTIVITIES
Cash Dividend Paid
YoY Change
Common Stock Issuance & Retirement, Net
YoY Change
Debt Paid & Issued, Net
YoY Change
Cash From Financing Activities	-112.9M	-27.82M	-43.30M
YoY Change	408.64%	-35.75%	-18.91%
NET CHANGE
Cash From Operating Activities	205.3M	47.85M	-8.300M
Cash From Investing Activities	-8.597M	-1.186M	-31.60M
Cash From Financing Activities	-112.9M	-27.82M	-43.30M
Net Change In Cash	83.80M	18.84M	-83.20M
YoY Change	-55.28%	-122.65%	-14.32%
FREE CASH FLOW
Cash From Operating Activities	$205.3M	$47.85M	-$8.300M
Capital Expenditures	-$9.304M	-$2.895M	-$29.30M
Free Cash Flow	$214.6M	$50.74M	$21.00M
YoY Change	-20.28%	141.63%	-423.08%

Facts In Submission

Frame	Concept Type	Concept / XBRL Key	Value	Unit
	dei	Entity Registrant Name EntityRegistrantName	INSPERITY, INC.
	dei	Entity Central Index Key EntityCentralIndexKey	0001000753
	dei	Current Fiscal Year End Date CurrentFiscalYearEndDate	--12-31
	dei	Document Fiscal Year Focus DocumentFiscalYearFocus	2021
	dei	Document Fiscal Period Focus DocumentFiscalPeriodFocus	Q3
	dei	Amendment Flag AmendmentFlag	false
CY2021Q4	dei	Entity Common Stock Shares Outstanding EntityCommonStockSharesOutstanding	38501746	shares
	nsp	Time Period Incurred Claims Expected To Be Paid Included In Deposits TimePeriodIncurredClaimsExpectedToBePaidIncludedInDeposits	Greater than 1 year
	nsp	Time Period Estimate Of Incurred Claim Costs To Be Paid Included In Long Term Liabilities TimePeriodEstimateOfIncurredClaimCostsToBePaidIncludedInLongTermLiabilities	Greater than 1 year
	dei	Document Type DocumentType	10-Q
	dei	Document Quarterly Report DocumentQuarterlyReport	true
	dei	Document Period End Date DocumentPeriodEndDate	2021-09-30
	dei	Document Transition Report DocumentTransitionReport	false
	dei	Entity File Number EntityFileNumber	1-13998
	dei	Entity Incorporation State Country Code EntityIncorporationStateCountryCode	DE
	dei	Entity Tax Identification Number EntityTaxIdentificationNumber	76-0479645
	dei	Entity Address Address Line1 EntityAddressAddressLine1	19001 Crescent Springs Drive
	dei	Entity Address City Or Town EntityAddressCityOrTown	Kingwood,
	dei	Entity Address State Or Province EntityAddressStateOrProvince	TX
	dei	Entity Address Postal Zip Code EntityAddressPostalZipCode	77339
	dei	City Area Code CityAreaCode	281
	dei	Local Phone Number LocalPhoneNumber	358-8986
	dei	Entity Current Reporting Status EntityCurrentReportingStatus	Yes
	dei	Entity Interactive Data Current EntityInteractiveDataCurrent	Yes
	dei	Entity Filer Category EntityFilerCategory	Large Accelerated Filer
	dei	Entity Emerging Growth Company EntityEmergingGrowthCompany	false
	dei	Entity Small Business EntitySmallBusiness	false
	dei	Entity Shell Company EntityShellCompany	false
CY2021Q4	dei	Entity Common Stock Shares Outstanding EntityCommonStockSharesOutstanding	38501746	shares
CY2021Q3	us-gaap	Cash And Cash Equivalents At Carrying Value CashAndCashEquivalentsAtCarryingValue	467921000	USD
CY2020Q4	us-gaap	Cash And Cash Equivalents At Carrying Value CashAndCashEquivalentsAtCarryingValue	554846000	USD
CY2021Q3	us-gaap	Restricted Cash And Cash Equivalents At Carrying Value RestrictedCashAndCashEquivalentsAtCarryingValue	47813000	USD
CY2020Q4	us-gaap	Restricted Cash And Cash Equivalents At Carrying Value RestrictedCashAndCashEquivalentsAtCarryingValue	45522000	USD
CY2021Q3	us-gaap	Marketable Securities Current MarketableSecuritiesCurrent	32697000	USD
CY2020Q4	us-gaap	Marketable Securities Current MarketableSecuritiesCurrent	34529000	USD
CY2021Q3	us-gaap	Receivables Net Current ReceivablesNetCurrent	579503000	USD
CY2020Q4	us-gaap	Receivables Net Current ReceivablesNetCurrent	392746000	USD
CY2021Q3	us-gaap	Prepaid Insurance PrepaidInsurance	19657000	USD
CY2020Q4	us-gaap	Prepaid Insurance PrepaidInsurance	10164000	USD
CY2021Q3	us-gaap	Other Assets Current OtherAssetsCurrent	53293000	USD
CY2020Q4	us-gaap	Other Assets Current OtherAssetsCurrent	39461000	USD
CY2021Q3	us-gaap	Nontrade Receivables NontradeReceivables	5584000	USD
CY2020Q4	us-gaap	Nontrade Receivables NontradeReceivables	0	USD
CY2021Q3	us-gaap	Assets Current AssetsCurrent	1206468000	USD
CY2020Q4	us-gaap	Assets Current AssetsCurrent	1077268000	USD
CY2021Q3	us-gaap	Property Plant And Equipment Net PropertyPlantAndEquipmentNet	212322000	USD
CY2020Q4	us-gaap	Property Plant And Equipment Net PropertyPlantAndEquipmentNet	216256000	USD
CY2021Q3	us-gaap	Operating Lease Right Of Use Asset OperatingLeaseRightOfUseAsset	63673000	USD
CY2020Q4	us-gaap	Operating Lease Right Of Use Asset OperatingLeaseRightOfUseAsset	60663000	USD
CY2021Q3	nsp	Prepaid Health Insurance Noncurrent PrepaidHealthInsuranceNoncurrent	9000000	USD
CY2020Q4	nsp	Prepaid Health Insurance Noncurrent PrepaidHealthInsuranceNoncurrent	9000000	USD
CY2021Q3	nsp	Deposits Health Insurance DepositsHealthInsurance	7900000	USD
CY2020Q4	nsp	Deposits Health Insurance DepositsHealthInsurance	7900000	USD
CY2021Q3	nsp	Deposits Workers Compensation DepositsWorkersCompensation	208236000	USD
CY2020Q4	nsp	Deposits Workers Compensation DepositsWorkersCompensation	186331000	USD
CY2021Q3	us-gaap	Intangible Assets Net Including Goodwill IntangibleAssetsNetIncludingGoodwill	12707000	USD
CY2020Q4	us-gaap	Intangible Assets Net Including Goodwill IntangibleAssetsNetIncludingGoodwill	12707000	USD
CY2021Q3	us-gaap	Deferred Income Tax Assets Net DeferredIncomeTaxAssetsNet	1653000	USD
CY2020Q4	us-gaap	Deferred Income Tax Assets Net DeferredIncomeTaxAssetsNet	9603000	USD
CY2021Q3	us-gaap	Other Assets Noncurrent OtherAssetsNoncurrent	12093000	USD
CY2020Q4	us-gaap	Other Assets Noncurrent OtherAssetsNoncurrent	4548000	USD
CY2021Q3	us-gaap	Assets Assets	1734052000	USD
CY2020Q4	us-gaap	Assets Assets	1584276000	USD
CY2021Q3	us-gaap	Accounts Payable Current AccountsPayableCurrent	4250000	USD
CY2020Q4	us-gaap	Accounts Payable Current AccountsPayableCurrent	6203000	USD
CY2021Q3	us-gaap	Accrued Payroll Taxes Current AccruedPayrollTaxesCurrent	232862000	USD
CY2020Q4	us-gaap	Accrued Payroll Taxes Current AccruedPayrollTaxesCurrent	377960000	USD
CY2021Q3	nsp	Accrued Worksite Employee Payroll Costs AccruedWorksiteEmployeePayrollCosts	534890000	USD
CY2020Q4	nsp	Accrued Worksite Employee Payroll Costs AccruedWorksiteEmployeePayrollCosts	334836000	USD
CY2021Q3	nsp	Accrued Health Insurance Costs AccruedHealthInsuranceCosts	40366000	USD
CY2020Q4	nsp	Accrued Health Insurance Costs AccruedHealthInsuranceCosts	32685000	USD
CY2021Q3	us-gaap	Workers Compensation Liability Current WorkersCompensationLiabilityCurrent	51368000	USD
CY2020Q4	us-gaap	Workers Compensation Liability Current WorkersCompensationLiabilityCurrent	48186000	USD
CY2021Q3	us-gaap	Accrued Salaries Current And Noncurrent AccruedSalariesCurrentAndNoncurrent	69621000	USD
CY2020Q4	us-gaap	Accrued Salaries Current And Noncurrent AccruedSalariesCurrentAndNoncurrent	44277000	USD
CY2021Q3	us-gaap	Accrued Liabilities Current AccruedLiabilitiesCurrent	70824000	USD
CY2020Q4	us-gaap	Accrued Liabilities Current AccruedLiabilitiesCurrent	60777000	USD
CY2021Q3	us-gaap	Liabilities Current LiabilitiesCurrent	1004181000	USD
CY2020Q4	us-gaap	Liabilities Current LiabilitiesCurrent	904924000	USD
CY2021Q3	us-gaap	Workers Compensation Liability Noncurrent WorkersCompensationLiabilityNoncurrent	191193000	USD
CY2020Q4	us-gaap	Workers Compensation Liability Noncurrent WorkersCompensationLiabilityNoncurrent	195239000	USD
CY2021Q3	us-gaap	Long Term Debt Noncurrent LongTermDebtNoncurrent	369400000	USD
CY2020Q4	us-gaap	Long Term Debt Noncurrent LongTermDebtNoncurrent	369400000	USD
CY2021Q3	us-gaap	Operating Lease Liability Noncurrent OperatingLeaseLiabilityNoncurrent	65979000	USD
CY2020Q4	us-gaap	Operating Lease Liability Noncurrent OperatingLeaseLiabilityNoncurrent	64289000	USD
CY2021Q3	us-gaap	Other Accrued Liabilities Noncurrent OtherAccruedLiabilitiesNoncurrent	6293000	USD
CY2020Q4	us-gaap	Other Accrued Liabilities Noncurrent OtherAccruedLiabilitiesNoncurrent	6292000	USD
CY2021Q3	us-gaap	Liabilities Noncurrent LiabilitiesNoncurrent	632865000	USD
CY2020Q4	us-gaap	Liabilities Noncurrent LiabilitiesNoncurrent	635220000	USD
CY2021Q3	us-gaap	Commitments And Contingencies CommitmentsAndContingencies		USD
CY2020Q4	us-gaap	Commitments And Contingencies CommitmentsAndContingencies		USD
CY2021Q3	us-gaap	Common Stock Value CommonStockValue	555000	USD
CY2020Q4	us-gaap	Common Stock Value CommonStockValue	555000	USD
CY2021Q3	us-gaap	Additional Paid In Capital Common Stock AdditionalPaidInCapitalCommonStock	104587000	USD
CY2020Q4	us-gaap	Additional Paid In Capital Common Stock AdditionalPaidInCapitalCommonStock	95528000	USD
CY2021Q3	us-gaap	Treasury Stock Value TreasuryStockValue	645993000	USD
CY2020Q4	us-gaap	Treasury Stock Value TreasuryStockValue	626984000	USD
CY2021Q3	us-gaap	Retained Earnings Accumulated Deficit RetainedEarningsAccumulatedDeficit	637857000	USD
CY2020Q4	us-gaap	Retained Earnings Accumulated Deficit RetainedEarningsAccumulatedDeficit	575033000	USD
CY2021Q3	us-gaap	Stockholders Equity StockholdersEquity	97006000	USD
CY2020Q4	us-gaap	Stockholders Equity StockholdersEquity	44132000	USD
CY2021Q3	us-gaap	Liabilities And Stockholders Equity LiabilitiesAndStockholdersEquity	1734052000	USD
CY2020Q4	us-gaap	Liabilities And Stockholders Equity LiabilitiesAndStockholdersEquity	1584276000	USD
CY2021Q3	us-gaap	Revenue From Contract With Customer Excluding Assessed Tax RevenueFromContractWithCustomerExcludingAssessedTax	1209628000	USD
CY2020Q3	us-gaap	Revenue From Contract With Customer Excluding Assessed Tax RevenueFromContractWithCustomerExcludingAssessedTax	1007820000	USD
	us-gaap	Revenue From Contract With Customer Excluding Assessed Tax RevenueFromContractWithCustomerExcludingAssessedTax	3681834000	USD
	us-gaap	Revenue From Contract With Customer Excluding Assessed Tax RevenueFromContractWithCustomerExcludingAssessedTax	3230669000	USD
CY2021Q3	nsp	Payroll Taxes Benefits And Workers Compensation Costs PayrollTaxesBenefitsAndWorkersCompensationCosts	1011149000	USD
CY2020Q3	nsp	Payroll Taxes Benefits And Workers Compensation Costs PayrollTaxesBenefitsAndWorkersCompensationCosts	822787000	USD
	nsp	Payroll Taxes Benefits And Workers Compensation Costs PayrollTaxesBenefitsAndWorkersCompensationCosts	3032356000	USD
	nsp	Payroll Taxes Benefits And Workers Compensation Costs PayrollTaxesBenefitsAndWorkersCompensationCosts	2591365000	USD
CY2021Q3	us-gaap	Gross Profit GrossProfit	198479000	USD
CY2020Q3	us-gaap	Gross Profit GrossProfit	185033000	USD
	us-gaap	Gross Profit GrossProfit	649478000	USD
	us-gaap	Gross Profit GrossProfit	639304000	USD
CY2021Q3	nsp	Salaries Wages And Payroll Taxes SalariesWagesAndPayrollTaxes	89232000	USD
CY2020Q3	nsp	Salaries Wages And Payroll Taxes SalariesWagesAndPayrollTaxes	89429000	USD
	nsp	Salaries Wages And Payroll Taxes SalariesWagesAndPayrollTaxes	286669000	USD
	nsp	Salaries Wages And Payroll Taxes SalariesWagesAndPayrollTaxes	266640000	USD
CY2021Q3	us-gaap	Allocated Share Based Compensation Expense AllocatedShareBasedCompensationExpense	10362000	USD
CY2020Q3	us-gaap	Allocated Share Based Compensation Expense AllocatedShareBasedCompensationExpense	20864000	USD
	us-gaap	Allocated Share Based Compensation Expense AllocatedShareBasedCompensationExpense	35965000	USD
	us-gaap	Allocated Share Based Compensation Expense AllocatedShareBasedCompensationExpense	38110000	USD
CY2021Q3	us-gaap	Sales Commissions And Fees SalesCommissionsAndFees	8724000	USD
CY2020Q3	us-gaap	Sales Commissions And Fees SalesCommissionsAndFees	7722000	USD
	us-gaap	Sales Commissions And Fees SalesCommissionsAndFees	24694000	USD
	us-gaap	Sales Commissions And Fees SalesCommissionsAndFees	23657000	USD
CY2021Q3	us-gaap	Advertising Expense AdvertisingExpense	9507000	USD
CY2020Q3	us-gaap	Advertising Expense AdvertisingExpense	4781000	USD
	us-gaap	Advertising Expense AdvertisingExpense	23804000	USD
	us-gaap	Advertising Expense AdvertisingExpense	15334000	USD
CY2021Q3	us-gaap	General And Administrative Expense GeneralAndAdministrativeExpense	31134000	USD
CY2020Q3	us-gaap	General And Administrative Expense GeneralAndAdministrativeExpense	25646000	USD
	us-gaap	General And Administrative Expense GeneralAndAdministrativeExpense	91981000	USD
	us-gaap	General And Administrative Expense GeneralAndAdministrativeExpense	85254000	USD
CY2021Q3	us-gaap	Depreciation And Amortization DepreciationAndAmortization	9917000	USD
CY2020Q3	us-gaap	Depreciation And Amortization DepreciationAndAmortization	7819000	USD
	us-gaap	Depreciation And Amortization DepreciationAndAmortization	27715000	USD
	us-gaap	Depreciation And Amortization DepreciationAndAmortization	23329000	USD
CY2021Q3	us-gaap	Operating Expenses OperatingExpenses	158876000	USD
CY2020Q3	us-gaap	Operating Expenses OperatingExpenses	156261000	USD
	us-gaap	Operating Expenses OperatingExpenses	490828000	USD
	us-gaap	Operating Expenses OperatingExpenses	452324000	USD
CY2021Q3	us-gaap	Operating Income Loss OperatingIncomeLoss	39603000	USD
CY2020Q3	us-gaap	Operating Income Loss OperatingIncomeLoss	28772000	USD
	us-gaap	Operating Income Loss OperatingIncomeLoss	158650000	USD
	us-gaap	Operating Income Loss OperatingIncomeLoss	186980000	USD
CY2021Q3	us-gaap	Interest Income Other InterestIncomeOther	251000	USD
CY2020Q3	us-gaap	Interest Income Other InterestIncomeOther	103000	USD
	us-gaap	Interest Income Other InterestIncomeOther	2230000	USD
	us-gaap	Interest Income Other InterestIncomeOther	2351000	USD
CY2021Q3	us-gaap	Interest Expense InterestExpense	1963000	USD
CY2020Q3	us-gaap	Interest Expense InterestExpense	1731000	USD
	us-gaap	Interest Expense InterestExpense	5537000	USD
	us-gaap	Interest Expense InterestExpense	6312000	USD
CY2021Q3	us-gaap	Income Loss From Continuing Operations Before Income Taxes Extraordinary Items Noncontrolling Interest IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest	37891000	USD
CY2020Q3	us-gaap	Income Loss From Continuing Operations Before Income Taxes Extraordinary Items Noncontrolling Interest IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest	27144000	USD
	us-gaap	Income Loss From Continuing Operations Before Income Taxes Extraordinary Items Noncontrolling Interest IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest	155343000	USD
	us-gaap	Income Loss From Continuing Operations Before Income Taxes Extraordinary Items Noncontrolling Interest IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest	183019000	USD
CY2021Q3	us-gaap	Income Tax Expense Benefit IncomeTaxExpenseBenefit	10595000	USD
CY2020Q3	us-gaap	Income Tax Expense Benefit IncomeTaxExpenseBenefit	7135000	USD
	us-gaap	Income Tax Expense Benefit IncomeTaxExpenseBenefit	40971000	USD
	us-gaap	Income Tax Expense Benefit IncomeTaxExpenseBenefit	49067000	USD
CY2021Q3	us-gaap	Net Income Loss NetIncomeLoss	27296000	USD
CY2020Q3	us-gaap	Net Income Loss NetIncomeLoss	20009000	USD
	us-gaap	Net Income Loss NetIncomeLoss	114372000	USD
	us-gaap	Net Income Loss NetIncomeLoss	133952000	USD
CY2021Q3	us-gaap	Participating Securities Distributed And Undistributed Earnings Loss Diluted ParticipatingSecuritiesDistributedAndUndistributedEarningsLossDiluted	39000	USD
CY2020Q3	us-gaap	Participating Securities Distributed And Undistributed Earnings Loss Diluted ParticipatingSecuritiesDistributedAndUndistributedEarningsLossDiluted	104000	USD
	us-gaap	Participating Securities Distributed And Undistributed Earnings Loss Diluted ParticipatingSecuritiesDistributedAndUndistributedEarningsLossDiluted	219000	USD
	us-gaap	Participating Securities Distributed And Undistributed Earnings Loss Diluted ParticipatingSecuritiesDistributedAndUndistributedEarningsLossDiluted	792000	USD
CY2021Q3	us-gaap	Net Income Loss Available To Common Stockholders Basic NetIncomeLossAvailableToCommonStockholdersBasic	27257000	USD
CY2020Q3	us-gaap	Net Income Loss Available To Common Stockholders Basic NetIncomeLossAvailableToCommonStockholdersBasic	19905000	USD
	us-gaap	Net Income Loss Available To Common Stockholders Basic NetIncomeLossAvailableToCommonStockholdersBasic	114153000	USD
	us-gaap	Net Income Loss Available To Common Stockholders Basic NetIncomeLossAvailableToCommonStockholdersBasic	133160000	USD
CY2021Q3	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	0.71
CY2020Q3	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	0.52
	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	2.97
	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	3.45
CY2021Q3	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	0.70
CY2020Q3	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	0.51
	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	2.94
	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	3.43
CY2021Q3	nsp	Gross Billings GrossBillings	7994006000	USD
CY2020Q3	nsp	Gross Billings GrossBillings	6563727000	USD
	nsp	Gross Billings GrossBillings	23682279000	USD
	nsp	Gross Billings GrossBillings	20356164000	USD
CY2021Q3	nsp	Worksite Employee Payroll Cost WorksiteEmployeePayrollCost	6784378000	USD
CY2020Q3	nsp	Worksite Employee Payroll Cost WorksiteEmployeePayrollCost	5555907000	USD
	nsp	Worksite Employee Payroll Cost WorksiteEmployeePayrollCost	20000445000	USD
	nsp	Worksite Employee Payroll Cost WorksiteEmployeePayrollCost	17125495000	USD
CY2021Q3	us-gaap	Revenue From Contract With Customer Excluding Assessed Tax RevenueFromContractWithCustomerExcludingAssessedTax	1209628000	USD
CY2020Q3	us-gaap	Revenue From Contract With Customer Excluding Assessed Tax RevenueFromContractWithCustomerExcludingAssessedTax	1007820000	USD
	us-gaap	Revenue From Contract With Customer Excluding Assessed Tax RevenueFromContractWithCustomerExcludingAssessedTax	3681834000	USD
	us-gaap	Revenue From Contract With Customer Excluding Assessed Tax RevenueFromContractWithCustomerExcludingAssessedTax	3230669000	USD
	us-gaap	Net Income Loss NetIncomeLoss	114372000	USD
	us-gaap	Net Income Loss NetIncomeLoss	133952000	USD
	us-gaap	Depreciation And Amortization DepreciationAndAmortization	27715000	USD
	us-gaap	Depreciation And Amortization DepreciationAndAmortization	23329000	USD
	us-gaap	Allocated Share Based Compensation Expense AllocatedShareBasedCompensationExpense	35965000	USD
	us-gaap	Allocated Share Based Compensation Expense AllocatedShareBasedCompensationExpense	38110000	USD
	us-gaap	Deferred Income Tax Expense Benefit DeferredIncomeTaxExpenseBenefit	7950000	USD
	us-gaap	Deferred Income Tax Expense Benefit DeferredIncomeTaxExpenseBenefit	6757000	USD
	us-gaap	Increase Decrease In Accounts Receivable IncreaseDecreaseInAccountsReceivable	186757000	USD
	us-gaap	Increase Decrease In Accounts Receivable IncreaseDecreaseInAccountsReceivable	62933000	USD
	us-gaap	Increase Decrease In Prepaid Expense IncreaseDecreaseInPrepaidExpense	9493000	USD
	us-gaap	Increase Decrease In Prepaid Expense IncreaseDecreaseInPrepaidExpense	24341000	USD
	us-gaap	Increase Decrease In Other Current Assets IncreaseDecreaseInOtherCurrentAssets	13832000	USD
	us-gaap	Increase Decrease In Other Current Assets IncreaseDecreaseInOtherCurrentAssets	-9721000	USD
	us-gaap	Increase Decrease In Other Noncurrent Assets IncreaseDecreaseInOtherNoncurrentAssets	-4153000	USD
	us-gaap	Increase Decrease In Other Noncurrent Assets IncreaseDecreaseInOtherNoncurrentAssets	-10862000	USD
	us-gaap	Increase Decrease In Accounts Payable Trade IncreaseDecreaseInAccountsPayableTrade	-1953000	USD
	us-gaap	Increase Decrease In Accounts Payable Trade IncreaseDecreaseInAccountsPayableTrade	1451000	USD
	us-gaap	Increase Decrease In Other Employee Related Liabilities IncreaseDecreaseInOtherEmployeeRelatedLiabilities	-145098000	USD
	us-gaap	Increase Decrease In Other Employee Related Liabilities IncreaseDecreaseInOtherEmployeeRelatedLiabilities	-99196000	USD
	nsp	Increase Decreasein Wse Epayrollexpense IncreaseDecreaseinWSEEpayrollexpense	200054000	USD
	nsp	Increase Decreasein Wse Epayrollexpense IncreaseDecreaseinWSEEpayrollexpense	69937000	USD
	us-gaap	Increase Decrease In Health Care Insurance Liabilities IncreaseDecreaseInHealthCareInsuranceLiabilities	7681000	USD
	us-gaap	Increase Decrease In Health Care Insurance Liabilities IncreaseDecreaseInHealthCareInsuranceLiabilities	23459000	USD
	us-gaap	Increase Decrease In Workers Compensation Liabilities IncreaseDecreaseInWorkersCompensationLiabilities	-864000	USD
	us-gaap	Increase Decrease In Workers Compensation Liabilities IncreaseDecreaseInWorkersCompensationLiabilities	-2273000	USD
	us-gaap	Increase Decrease In Accrued Salaries IncreaseDecreaseInAccruedSalaries	22428000	USD
	us-gaap	Increase Decrease In Accrued Salaries IncreaseDecreaseInAccruedSalaries	-32238000	USD
	us-gaap	Increase Decrease In Income Taxes IncreaseDecreaseInIncomeTaxes	-7478000	USD
	us-gaap	Increase Decrease In Income Taxes IncreaseDecreaseInIncomeTaxes	9977000	USD
	us-gaap	Adjustments To Reconcile Net Income Loss To Cash Provided By Used In Operating Activities AdjustmentsToReconcileNetIncomeLossToCashProvidedByUsedInOperatingActivities	-59529000	USD
	us-gaap	Adjustments To Reconcile Net Income Loss To Cash Provided By Used In Operating Activities AdjustmentsToReconcileNetIncomeLossToCashProvidedByUsedInOperatingActivities	-27378000	USD
	us-gaap	Net Cash Provided By Used In Operating Activities NetCashProvidedByUsedInOperatingActivities	54843000	USD
	us-gaap	Net Cash Provided By Used In Operating Activities NetCashProvidedByUsedInOperatingActivities	106574000	USD
	us-gaap	Payments To Acquire Marketable Securities PaymentsToAcquireMarketableSecurities	41413000	USD
	us-gaap	Payments To Acquire Marketable Securities PaymentsToAcquireMarketableSecurities	42007000	USD
	nsp	Marketable Securities Proceeds From Dispositions MarketableSecuritiesProceedsFromDispositions	0	USD
	nsp	Marketable Securities Proceeds From Dispositions MarketableSecuritiesProceedsFromDispositions	484000	USD
	us-gaap	Proceeds From Sale And Maturity Of Marketable Securities ProceedsFromSaleAndMaturityOfMarketableSecurities	42600000	USD
	us-gaap	Proceeds From Sale And Maturity Of Marketable Securities ProceedsFromSaleAndMaturityOfMarketableSecurities	41860000	USD
	us-gaap	Payments To Acquire Property Plant And Equipment PaymentsToAcquirePropertyPlantAndEquipment	23603000	USD
	us-gaap	Payments To Acquire Property Plant And Equipment PaymentsToAcquirePropertyPlantAndEquipment	68770000	USD
	us-gaap	Net Cash Provided By Used In Investing Activities NetCashProvidedByUsedInInvestingActivities	-22416000	USD
	us-gaap	Net Cash Provided By Used In Investing Activities NetCashProvidedByUsedInInvestingActivities	-68433000	USD
	nsp	Treasury Stock Acquired TreasuryStockAcquired	49770000	USD
	nsp	Treasury Stock Acquired TreasuryStockAcquired	91216000	USD
	us-gaap	Payments Of Dividends Common Stock PaymentsOfDividendsCommonStock	50198000	USD
	us-gaap	Payments Of Dividends Common Stock PaymentsOfDividendsCommonStock	46522000	USD
	us-gaap	Proceeds From Lines Of Credit ProceedsFromLinesOfCredit	0	USD
	us-gaap	Proceeds From Lines Of Credit ProceedsFromLinesOfCredit	100000000	USD
	us-gaap	Proceeds From Payments For Other Financing Activities ProceedsFromPaymentsForOtherFinancingActivities	4812000	USD
	us-gaap	Proceeds From Payments For Other Financing Activities ProceedsFromPaymentsForOtherFinancingActivities	6302000	USD
	us-gaap	Net Cash Provided By Used In Financing Activities NetCashProvidedByUsedInFinancingActivities	-95156000	USD
	us-gaap	Net Cash Provided By Used In Financing Activities NetCashProvidedByUsedInFinancingActivities	-31436000	USD
	us-gaap	Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents Period Increase Decrease Excluding Exchange Rate Effect CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalentsPeriodIncreaseDecreaseExcludingExchangeRateEffect	-62729000	USD
	us-gaap	Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents Period Increase Decrease Excluding Exchange Rate Effect CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalentsPeriodIncreaseDecreaseExcludingExchangeRateEffect	6705000	USD
CY2020Q4	us-gaap	Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents	786699000	USD
CY2019Q4	us-gaap	Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents	592550000	USD
CY2021Q3	us-gaap	Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents	723970000	USD
CY2020Q3	us-gaap	Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents	599255000	USD
CY2020Q4	us-gaap	Cash And Cash Equivalents At Carrying Value CashAndCashEquivalentsAtCarryingValue	554846000	USD
CY2019Q4	us-gaap	Cash And Cash Equivalents At Carrying Value CashAndCashEquivalentsAtCarryingValue	367342000	USD
CY2020Q4	us-gaap	Restricted Cash And Cash Equivalents At Carrying Value RestrictedCashAndCashEquivalentsAtCarryingValue	45522000	USD
CY2019Q4	us-gaap	Restricted Cash And Cash Equivalents At Carrying Value RestrictedCashAndCashEquivalentsAtCarryingValue	49295000	USD
CY2020Q4	nsp	Deposits Workers Compensation DepositsWorkersCompensation	186331000	USD
CY2019Q4	nsp	Deposits Workers Compensation DepositsWorkersCompensation	175913000	USD
CY2020Q4	us-gaap	Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents	786699000	USD
CY2019Q4	us-gaap	Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents	592550000	USD
CY2021Q3	us-gaap	Cash And Cash Equivalents At Carrying Value CashAndCashEquivalentsAtCarryingValue	467921000	USD
CY2020Q3	us-gaap	Cash And Cash Equivalents At Carrying Value CashAndCashEquivalentsAtCarryingValue	372356000	USD
CY2021Q3	us-gaap	Restricted Cash And Cash Equivalents At Carrying Value RestrictedCashAndCashEquivalentsAtCarryingValue	47813000	USD
CY2020Q3	us-gaap	Restricted Cash And Cash Equivalents At Carrying Value RestrictedCashAndCashEquivalentsAtCarryingValue	45265000	USD
CY2021Q3	nsp	Deposits Workers Compensation DepositsWorkersCompensation	208236000	USD
CY2020Q3	nsp	Deposits Workers Compensation DepositsWorkersCompensation	181634000	USD
CY2021Q3	us-gaap	Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents	723970000	USD
CY2020Q3	us-gaap	Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents	599255000	USD
	us-gaap	Right Of Use Asset Obtained In Exchange For Operating Lease Liability RightOfUseAssetObtainedInExchangeForOperatingLeaseLiability	16275000	USD
	us-gaap	Right Of Use Asset Obtained In Exchange For Operating Lease Liability RightOfUseAssetObtainedInExchangeForOperatingLeaseLiability	18364000	USD
CY2020Q4	us-gaap	Stockholders Equity StockholdersEquity	44132000	USD
	us-gaap	Treasury Stock Value Acquired Cost Method TreasuryStockValueAcquiredCostMethod	49770000	USD
	us-gaap	Stock Issued During Period Value Share Based Compensation Gross StockIssuedDuringPeriodValueShareBasedCompensationGross	0	USD
	us-gaap	Adjustments To Additional Paid In Capital Sharebased Compensation Requisite Service Period Recognition Value AdjustmentsToAdditionalPaidInCapitalSharebasedCompensationRequisiteServicePeriodRecognitionValue	35965000	USD
	us-gaap	Stock Issued During Period Value Stock Options Exercised StockIssuedDuringPeriodValueStockOptionsExercised	240000	USD
	us-gaap	Stockholders Equity Other StockholdersEquityOther	-2278000	USD
	us-gaap	Dividends Common Stock Cash DividendsCommonStockCash	50198000	USD
	us-gaap	Other Comprehensive Income Unrealized Holding Gain Loss On Securities Arising During Period Net Of Tax OtherComprehensiveIncomeUnrealizedHoldingGainLossOnSecuritiesArisingDuringPeriodNetOfTax	-13000	USD
	us-gaap	Net Income Loss NetIncomeLoss	114372000	USD
CY2021Q3	us-gaap	Stockholders Equity StockholdersEquity	97006000	USD
CY2019Q4	us-gaap	Stockholders Equity StockholdersEquity	4079000	USD
	us-gaap	Treasury Stock Value Acquired Cost Method TreasuryStockValueAcquiredCostMethod	91216000	USD
	us-gaap	Stock Issued During Period Value Share Based Compensation Gross StockIssuedDuringPeriodValueShareBasedCompensationGross	0	USD
	us-gaap	Adjustments To Additional Paid In Capital Sharebased Compensation Requisite Service Period Recognition Value AdjustmentsToAdditionalPaidInCapitalSharebasedCompensationRequisiteServicePeriodRecognitionValue	38110000	USD
	us-gaap	Stockholders Equity Other StockholdersEquityOther	-2217000	USD
	us-gaap	Dividends Common Stock Cash DividendsCommonStockCash	46522000	USD
	us-gaap	Other Comprehensive Income Unrealized Holding Gain Loss On Securities Arising During Period Net Of Tax OtherComprehensiveIncomeUnrealizedHoldingGainLossOnSecuritiesArisingDuringPeriodNetOfTax	19000	USD
	us-gaap	Net Income Loss NetIncomeLoss	133952000	USD
CY2020Q3	us-gaap	Stockholders Equity StockholdersEquity	40639000	USD
CY2021Q2	us-gaap	Stockholders Equity StockholdersEquity	87262000	USD
CY2021Q3	us-gaap	Treasury Stock Value Acquired Cost Method TreasuryStockValueAcquiredCostMethod	11234000	USD
CY2021Q3	us-gaap	Stock Issued During Period Value Share Based Compensation Gross StockIssuedDuringPeriodValueShareBasedCompensationGross	0	USD
CY2021Q3	us-gaap	Adjustments To Additional Paid In Capital Sharebased Compensation Requisite Service Period Recognition Value AdjustmentsToAdditionalPaidInCapitalSharebasedCompensationRequisiteServicePeriodRecognitionValue	10362000	USD
CY2021Q3	us-gaap	Stockholders Equity Other StockholdersEquityOther	-696000	USD
CY2021Q3	us-gaap	Dividends Common Stock Cash DividendsCommonStockCash	17369000	USD
CY2021Q3	us-gaap	Other Comprehensive Income Unrealized Holding Gain Loss On Securities Arising During Period Net Of Tax OtherComprehensiveIncomeUnrealizedHoldingGainLossOnSecuritiesArisingDuringPeriodNetOfTax	-7000	USD
CY2021Q3	us-gaap	Net Income Loss NetIncomeLoss	27296000	USD
CY2021Q3	us-gaap	Stockholders Equity StockholdersEquity	97006000	USD
CY2020Q2	us-gaap	Stockholders Equity StockholdersEquity	44638000	USD
CY2020Q3	us-gaap	Treasury Stock Value Acquired Cost Method TreasuryStockValueAcquiredCostMethod	29986000	USD
CY2020Q3	us-gaap	Adjustments To Additional Paid In Capital Sharebased Compensation Requisite Service Period Recognition Value AdjustmentsToAdditionalPaidInCapitalSharebasedCompensationRequisiteServicePeriodRecognitionValue	20864000	USD
CY2020Q3	us-gaap	Stockholders Equity Other StockholdersEquityOther	-612000	USD
CY2020Q3	us-gaap	Dividends Common Stock Cash DividendsCommonStockCash	15448000	USD
CY2020Q3	us-gaap	Other Comprehensive Income Unrealized Holding Gain Loss On Securities Arising During Period Net Of Tax OtherComprehensiveIncomeUnrealizedHoldingGainLossOnSecuritiesArisingDuringPeriodNetOfTax	-50000	USD
CY2020Q3	us-gaap	Net Income Loss NetIncomeLoss	20009000	USD
CY2020Q3	us-gaap	Stockholders Equity StockholdersEquity	40639000	USD
CY2021Q3	nsp	Percentageofourhealthinsurancecoverageprovidedby United PercentageofourhealthinsurancecoverageprovidedbyUnited	0.87
	nsp	Number Of Days In Advance Of Beginning Of Reporting Quarter Carrier Establishes Cash Funding Rates NumberOfDaysInAdvanceOfBeginningOfReportingQuarterCarrierEstablishesCashFundingRates	P90D
CY2021Q3	nsp	Prepaid Health Insurance Noncurrent PrepaidHealthInsuranceNoncurrent	9000000	USD
CY2021Q3	nsp	Required Deposit For Health Care Costs RequiredDepositForHealthCareCosts	6500000	USD
CY2021Q3	nsp	Prepaid Health Insurance Current And Noncurrent PrepaidHealthInsuranceCurrentAndNoncurrent	15300000	USD
CY2021Q3	nsp	Prepaid Health Insurance Noncurrent PrepaidHealthInsuranceNoncurrent	9000000	USD
CY2021Q3	nsp	Prepaid Health Insurance Current PrepaidHealthInsuranceCurrent	6300000	USD
CY2021Q3	nsp	Premiums Owed To United PremiumsOwedToUnited	33700000	USD
CY2021Q3	nsp	Benefits Costs Incurred Reduced Relatedto Runoff BenefitsCostsIncurredReducedRelatedtoRunoff	4500000	USD
CY2020Q3	nsp	Benefits Costs Incurred Reduced Relatedto Runoff BenefitsCostsIncurredReducedRelatedtoRunoff	-1900000	USD
CY2021Q3	nsp	Workers Compensation Maximum Economic Burden First Layer Of Claims Per Occurrence WorkersCompensationMaximumEconomicBurdenFirstLayerOfClaimsPerOccurrence	1000000	USD
CY2021Q3	nsp	Workers Compensation Maximum Economic Burden First Layer Of Claims Per Occurrence WorkersCompensationMaximumEconomicBurdenFirstLayerOfClaimsPerOccurrence	1000000	USD
CY2021Q3	nsp	Workers Compensation Maximum Aggregate Economic Burden For Claims In Excess Of First Layer Cap Per Policy Year WorkersCompensationMaximumAggregateEconomicBurdenForClaimsInExcessOfFirstLayerCapPerPolicyYear	6000000	USD
CY2021Q3	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
	nsp	Decrease Increase In Accrued Workers Compensation Costs For Changes In Estimated Losses DecreaseIncreaseInAccruedWorkersCompensationCostsForChangesInEstimatedLosses	-31400000	USD
	nsp	Decrease Increase In Accrued Workers Compensation Costs For Changes In Estimated Losses DecreaseIncreaseInAccruedWorkersCompensationCostsForChangesInEstimatedLosses	-32400000	USD
	nsp	Us Treasury Rates That Correspond With Weighted Average Estimated Claim Payout Period USTreasuryRatesThatCorrespondWithWeightedAverageEstimatedClaimPayoutPeriod	0.005
	nsp	Us Treasury Rates That Correspond With Weighted Average Estimated Claim Payout Period USTreasuryRatesThatCorrespondWithWeightedAverageEstimatedClaimPayoutPeriod	0.007
CY2020Q4	us-gaap	Liability For Unpaid Claims And Claims Adjustment Expense Opening Balance Adjustments LiabilityForUnpaidClaimsAndClaimsAdjustmentExpenseOpeningBalanceAdjustments	240761000	USD
CY2019Q4	us-gaap	Liability For Unpaid Claims And Claims Adjustment Expense Opening Balance Adjustments LiabilityForUnpaidClaimsAndClaimsAdjustmentExpenseOpeningBalanceAdjustments	242904000	USD
	nsp	Workers Compensation Expense WorkersCompensationExpense	34349000	USD
	nsp	Workers Compensation Expense WorkersCompensationExpense	33397000	USD
	nsp	Workers Compensation Discount Changed During Period WorkersCompensationDiscountChangedDuringPeriod	476000	USD
	nsp	Workers Compensation Discount Changed During Period WorkersCompensationDiscountChangedDuringPeriod	-500000	USD
	us-gaap	Payments For Losses And Loss Adjustment Expense PaymentsForLossesAndLossAdjustmentExpense	36580000	USD
	us-gaap	Payments For Losses And Loss Adjustment Expense PaymentsForLossesAndLossAdjustmentExpense	34289000	USD
CY2021Q3	us-gaap	Workers Compensation Liability Current And Noncurrent WorkersCompensationLiabilityCurrentAndNoncurrent	239006000	USD
CY2020Q3	us-gaap	Workers Compensation Liability Current And Noncurrent WorkersCompensationLiabilityCurrentAndNoncurrent	241512000	USD
CY2021Q3	nsp	Workers Compensation Liability Net Of Admin Fees Current WorkersCompensationLiabilityNetOfAdminFeesCurrent	47813000	USD
CY2020Q3	nsp	Workers Compensation Liability Net Of Admin Fees Current WorkersCompensationLiabilityNetOfAdminFeesCurrent	45265000	USD
CY2021Q3	us-gaap	Workers Compensation Liability Noncurrent WorkersCompensationLiabilityNoncurrent	191193000	USD
CY2020Q3	us-gaap	Workers Compensation Liability Noncurrent WorkersCompensationLiabilityNoncurrent	196247000	USD
CY2021Q3	us-gaap	Workers Compensation Liability Current And Noncurrent WorkersCompensationLiabilityCurrentAndNoncurrent	239006000	USD
CY2020Q3	us-gaap	Workers Compensation Liability Current And Noncurrent WorkersCompensationLiabilityCurrentAndNoncurrent	241512000	USD
CY2021Q3	nsp	Workers Compensation Administrative Fees Accrued WorkersCompensationAdministrativeFeesAccrued	3600000	USD
	nsp	Undiscounted Accrued Workers Compensation Costs UndiscountedAccruedWorkersCompensationCosts	254500000	USD
	nsp	Undiscounted Accrued Workers Compensation Costs UndiscountedAccruedWorkersCompensationCosts	259400000	USD
	nsp	Time Period Incurred Claims Expected To Be Paid Recorded As Restricted TimePeriodIncurredClaimsExpectedToBePaidRecordedAsRestricted	P1Y
CY2021Q3	us-gaap	Restricted Cash And Cash Equivalents At Carrying Value RestrictedCashAndCashEquivalentsAtCarryingValue	47800000	USD
CY2021Q3	nsp	Deposits Workers Compensation DepositsWorkersCompensation	208200000	USD
	nsp	Time Period Estimate Of Incurred Claim Costs To Be Paid Included In Short Term Liabilities TimePeriodEstimateOfIncurredClaimCostsToBePaidIncludedInShortTermLiabilities	P1Y
CY2021Q3	srt	Drafts Payable DraftsPayable	16933000	USD
CY2021Q3	nsp	Unbilled Unbilled	564600000	USD
CY2020Q4	nsp	Unbilled Unbilled	380800000	USD
CY2021Q3	us-gaap	Revenue From Contract With Customer Excluding Assessed Tax RevenueFromContractWithCustomerExcludingAssessedTax	1209628000	USD
CY2020Q3	us-gaap	Revenue From Contract With Customer Excluding Assessed Tax RevenueFromContractWithCustomerExcludingAssessedTax	1007820000	USD
	us-gaap	Revenue From Contract With Customer Excluding Assessed Tax RevenueFromContractWithCustomerExcludingAssessedTax	3681834000	USD
	us-gaap	Revenue From Contract With Customer Excluding Assessed Tax RevenueFromContractWithCustomerExcludingAssessedTax	3230669000	USD
CY2021Q3	nsp	Money Market Funds Overnight Holdings At Carrying Value MoneyMarketFundsOvernightHoldingsAtCarryingValue	404564000	USD
CY2020Q4	nsp	Money Market Funds Overnight Holdings At Carrying Value MoneyMarketFundsOvernightHoldingsAtCarryingValue	503221000	USD
CY2021Q3	us-gaap	Short Term Investments ShortTermInvestments	82610000	USD
CY2020Q4	us-gaap	Short Term Investments ShortTermInvestments	82521000	USD
CY2021Q3	us-gaap	Cash Cash	30377000	USD
CY2020Q4	us-gaap	Cash Cash	33692000	USD
CY2020Q4	srt	Drafts Payable DraftsPayable	30059000	USD
CY2021Q3	us-gaap	Cash Cash Equivalents And Short Term Investments CashCashEquivalentsAndShortTermInvestments	500618000	USD
CY2020Q4	us-gaap	Cash Cash Equivalents And Short Term Investments CashCashEquivalentsAndShortTermInvestments	589375000	USD
CY2021Q3	nsp	Payroll Withholdings Included In Cash Balance PayrollWithholdingsIncludedInCashBalance	198400000	USD
CY2020Q4	nsp	Payroll Withholdings Included In Cash Balance PayrollWithholdingsIncludedInCashBalance	342000000	USD
CY2021Q3	nsp	Client Prepayments Included In Cash Balance ClientPrepaymentsIncludedInCashBalance	-74600000	USD
CY2020Q4	nsp	Client Prepayments Included In Cash Balance ClientPrepaymentsIncludedInCashBalance	-35300000	USD
CY2021Q3	us-gaap	Cash And Cash Equivalents Fair Value Disclosure CashAndCashEquivalentsFairValueDisclosure	454477000	USD
CY2020Q4	us-gaap	Cash And Cash Equivalents Fair Value Disclosure CashAndCashEquivalentsFairValueDisclosure	551213000	USD
CY2021Q3	us-gaap	Us Government Securities At Carrying Value USGovernmentSecuritiesAtCarryingValue	11074000	USD
CY2020Q4	us-gaap	Us Government Securities At Carrying Value USGovernmentSecuritiesAtCarryingValue	10531000	USD
CY2020Q4	us-gaap	Assets Fair Value Disclosure AssetsFairValueDisclosure	585742000	USD
CY2021Q3	us-gaap	Investments Fair Value Disclosure InvestmentsFairValueDisclosure	21623000	USD
CY2020Q4	us-gaap	Investments Fair Value Disclosure InvestmentsFairValueDisclosure	23998000	USD
CY2021Q3	us-gaap	Assets Fair Value Disclosure AssetsFairValueDisclosure	487174000	USD
CY2021Q3	us-gaap	Available For Sale Debt Securities Amortized Cost Basis AvailableForSaleDebtSecuritiesAmortizedCostBasis	32705000	USD
CY2021Q3	us-gaap	Available For Sale Debt Securities Accumulated Gross Unrealized Gain Before Tax AvailableForSaleDebtSecuritiesAccumulatedGrossUnrealizedGainBeforeTax	0	USD
CY2021Q3	us-gaap	Available For Sale Debt Securities Accumulated Gross Unrealized Loss Before Tax AvailableForSaleDebtSecuritiesAccumulatedGrossUnrealizedLossBeforeTax	8000	USD
CY2021Q3	us-gaap	Available For Sale Securities Debt Securities AvailableForSaleSecuritiesDebtSecurities	32697000	USD
CY2020Q4	us-gaap	Available For Sale Debt Securities Amortized Cost Basis AvailableForSaleDebtSecuritiesAmortizedCostBasis	34524000	USD
CY2020Q4	us-gaap	Available For Sale Debt Securities Accumulated Gross Unrealized Gain Before Tax AvailableForSaleDebtSecuritiesAccumulatedGrossUnrealizedGainBeforeTax	9000	USD
CY2020Q4	us-gaap	Available For Sale Debt Securities Accumulated Gross Unrealized Loss Before Tax AvailableForSaleDebtSecuritiesAccumulatedGrossUnrealizedLossBeforeTax	4000	USD
CY2020Q4	us-gaap	Available For Sale Securities Debt Securities AvailableForSaleSecuritiesDebtSecurities	34529000	USD
CY2021Q3	us-gaap	Available For Sale Securities Debt Maturities Within One Year Amortized Cost AvailableForSaleSecuritiesDebtMaturitiesWithinOneYearAmortizedCost	31573000	USD
CY2021Q3	us-gaap	Available For Sale Securities Debt Maturities Within One Year Fair Value AvailableForSaleSecuritiesDebtMaturitiesWithinOneYearFairValue	31566000	USD
CY2021Q3	us-gaap	Available For Sale Securities Debt Maturities After One Through Five Years Amortized Cost AvailableForSaleSecuritiesDebtMaturitiesAfterOneThroughFiveYearsAmortizedCost	1132000	USD
CY2021Q3	us-gaap	Available For Sale Securities Debt Maturities After One Through Five Years Fair Value AvailableForSaleSecuritiesDebtMaturitiesAfterOneThroughFiveYearsFairValue	1131000	USD
CY2021Q3	us-gaap	Line Of Credit Facility Current Borrowing Capacity LineOfCreditFacilityCurrentBorrowingCapacity	500000000	USD
CY2021Q3	us-gaap	Line Of Credit Facility Maximum Borrowing Capacity LineOfCreditFacilityMaximumBorrowingCapacity	550000000	USD
	nsp	Percentage Of Subsidiary Stock Securing Debt PercentageOfSubsidiaryStockSecuringDebt	0.65
CY2021Q3	us-gaap	Long Term Debt Noncurrent LongTermDebtNoncurrent	369400000	USD
CY2021Q3	us-gaap	Letters Of Credit Outstanding Amount LettersOfCreditOutstandingAmount	1000000	USD
CY2021Q3	us-gaap	Line Of Credit Facility Remaining Borrowing Capacity LineOfCreditFacilityRemainingBorrowingCapacity	129600000	USD
CY2021Q3	nsp	Applicable Margin Federal Funds Rate ApplicableMarginFederalFundsRate	0.0050
CY2021Q3	nsp	Applicable Margin30 Day Libor ApplicableMargin30DayLibor	0.0200
	us-gaap	Line Of Credit Facility Unused Capacity Commitment Fee Percentage LineOfCreditFacilityUnusedCapacityCommitmentFeePercentage	0.0025
	us-gaap	Line Of Credit Facility Interest Rate During Period LineOfCreditFacilityInterestRateDuringPeriod	0.019
	nsp	Aggregatenumberofsharesrepurchasedduringtheperiod Aggregatenumberofsharesrepurchasedduringtheperiod	544132	shares
	us-gaap	Treasury Stock Shares Acquired TreasuryStockSharesAcquired	253309	shares
CY2021Q3	us-gaap	Stock Repurchase Program Remaining Number Of Shares Authorized To Be Repurchased StockRepurchaseProgramRemainingNumberOfSharesAuthorizedToBeRepurchased	874828	shares
	us-gaap	Shares Paid For Tax Withholding For Share Based Compensation SharesPaidForTaxWithholdingForShareBasedCompensation	290823	shares
CY2021Q1	us-gaap	Common Stock Dividends Per Share Declared CommonStockDividendsPerShareDeclared	0.40
CY2020Q1	us-gaap	Common Stock Dividends Per Share Declared CommonStockDividendsPerShareDeclared	0.40
CY2021Q2	us-gaap	Common Stock Dividends Per Share Declared CommonStockDividendsPerShareDeclared	0.45
CY2020Q2	us-gaap	Common Stock Dividends Per Share Declared CommonStockDividendsPerShareDeclared	0.40
CY2021Q3	us-gaap	Common Stock Dividends Per Share Declared CommonStockDividendsPerShareDeclared	0.45
CY2020Q3	us-gaap	Common Stock Dividends Per Share Declared CommonStockDividendsPerShareDeclared	0.40
	us-gaap	Payments Of Dividends Common Stock PaymentsOfDividendsCommonStock	50200000	USD
	us-gaap	Net Income Loss Available To Common Stockholders Basic NetIncomeLossAvailableToCommonStockholdersBasic	133160000	USD
	us-gaap	Payments Of Dividends Common Stock PaymentsOfDividendsCommonStock	46500000	USD
CY2021Q3	us-gaap	Net Income Loss NetIncomeLoss	27296000	USD
CY2020Q3	us-gaap	Net Income Loss NetIncomeLoss	20009000	USD
	us-gaap	Net Income Loss NetIncomeLoss	114372000	USD
	us-gaap	Net Income Loss NetIncomeLoss	133952000	USD
CY2021Q3	us-gaap	Participating Securities Distributed And Undistributed Earnings Loss Diluted ParticipatingSecuritiesDistributedAndUndistributedEarningsLossDiluted	39000	USD
CY2020Q3	us-gaap	Participating Securities Distributed And Undistributed Earnings Loss Diluted ParticipatingSecuritiesDistributedAndUndistributedEarningsLossDiluted	104000	USD
	us-gaap	Participating Securities Distributed And Undistributed Earnings Loss Diluted ParticipatingSecuritiesDistributedAndUndistributedEarningsLossDiluted	219000	USD
	us-gaap	Participating Securities Distributed And Undistributed Earnings Loss Diluted ParticipatingSecuritiesDistributedAndUndistributedEarningsLossDiluted	792000	USD
CY2021Q3	us-gaap	Net Income Loss Available To Common Stockholders Basic NetIncomeLossAvailableToCommonStockholdersBasic	27257000	USD
CY2020Q3	us-gaap	Net Income Loss Available To Common Stockholders Basic NetIncomeLossAvailableToCommonStockholdersBasic	19905000	USD
	us-gaap	Net Income Loss Available To Common Stockholders Basic NetIncomeLossAvailableToCommonStockholdersBasic	114153000	USD
CY2021Q3	us-gaap	Weighted Average Number Of Shares Outstanding Basic WeightedAverageNumberOfSharesOutstandingBasic	38524000	shares
CY2020Q3	us-gaap	Weighted Average Number Of Shares Outstanding Basic WeightedAverageNumberOfSharesOutstandingBasic	38507000	shares
	us-gaap	Weighted Average Number Of Shares Outstanding Basic WeightedAverageNumberOfSharesOutstandingBasic	38445000	shares
	us-gaap	Weighted Average Number Of Shares Outstanding Basic WeightedAverageNumberOfSharesOutstandingBasic	38625000	shares
CY2021Q3	us-gaap	Incremental Common Shares Attributable To Share Based Payment Arrangements IncrementalCommonSharesAttributableToShareBasedPaymentArrangements	357000	shares
CY2020Q3	us-gaap	Incremental Common Shares Attributable To Share Based Payment Arrangements IncrementalCommonSharesAttributableToShareBasedPaymentArrangements	234000	shares
	us-gaap	Incremental Common Shares Attributable To Share Based Payment Arrangements IncrementalCommonSharesAttributableToShareBasedPaymentArrangements	404000	shares
	us-gaap	Incremental Common Shares Attributable To Share Based Payment Arrangements IncrementalCommonSharesAttributableToShareBasedPaymentArrangements	193000	shares
CY2021Q3	us-gaap	Weighted Average Number Of Diluted Shares Outstanding WeightedAverageNumberOfDilutedSharesOutstanding	38881000	shares
CY2020Q3	us-gaap	Weighted Average Number Of Diluted Shares Outstanding WeightedAverageNumberOfDilutedSharesOutstanding	38741000	shares
	us-gaap	Weighted Average Number Of Diluted Shares Outstanding WeightedAverageNumberOfDilutedSharesOutstanding	38849000	shares
	us-gaap	Weighted Average Number Of Diluted Shares Outstanding WeightedAverageNumberOfDilutedSharesOutstanding	38818000	shares
	us-gaap	Loss Contingency Accrual Provision LossContingencyAccrualProvision	0	USD

Files In Submission

Name	View Source	Status
0001000753-21-000044-index-headers.html	Edgar Link	pending
0001000753-21-000044-index.html	Edgar Link	pending
0001000753-21-000044.txt	Edgar Link	pending
0001000753-21-000044-xbrl.zip	Edgar Link	pending
a09302021-nspex311.htm	Edgar Link	pending
a09302021-nspex312.htm	Edgar Link	pending
a09302021-nspex321.htm	Edgar Link	pending
a09302021-nspex322.htm	Edgar Link	pending
FilingSummary.xml	Edgar Link	unprocessable
Financial_Report.xlsx	Edgar Link	pending
MetaLinks.json	Edgar Link	pending
nsp-20210930.htm	Edgar Link	pending
nsp-20210930.xsd	Edgar Link	pending
nsp-20210930_cal.xml	Edgar Link	unprocessable
nsp-20210930_def.xml	Edgar Link	unprocessable
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nsp-20210930_g10.jpg	Edgar Link	pending
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nsp-20210930_g2.jpg	Edgar Link	pending
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nsp-20210930_g4.jpg	Edgar Link	pending
nsp-20210930_g5.jpg	Edgar Link	pending
nsp-20210930_g6.jpg	Edgar Link	pending
nsp-20210930_g7.jpg	Edgar Link	pending
nsp-20210930_g8.jpg	Edgar Link	pending
nsp-20210930_g9.jpg	Edgar Link	pending
nsp-20210930_htm.xml	Edgar Link	completed
nsp-20210930_lab.xml	Edgar Link	unprocessable
nsp-20210930_pre.xml	Edgar Link	unprocessable
R1.htm	Edgar Link	pending
R10.htm	Edgar Link	pending
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R2.htm	Edgar Link	pending
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R3.htm	Edgar Link	pending
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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

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$NSP
INSPERITY, INC. Stock $nsp

2021 Q4 Form 10-Q Financial Statement

#000100075321000044 Filed on November 02, 2021

Income Statement

Balance Sheet

Cashflow Statement

Facts In Submission

Files In Submission

$NSP INSPERITY, INC. Stock $nsp

2021 Q4 Form 10-Q Financial Statement

#000100075321000044 Filed on November 02, 2021

Income Statement

Balance Sheet

Cashflow Statement

Facts In Submission

Files In Submission

$NSP
INSPERITY, INC. Stock $nsp