$NSP
INSPERITY, INC. Stock $nsp

$nsp Overview Financials Valuation SEC Filings Company Website

2018 Q4 Form 10-K Financial Statement

#000100075319000007 Filed on February 11, 2019

Income Statement

Concept	2018 Q4	2018	2017 Q4
Revenue	$966.8M	$3.829B	$826.5M
YoY Change	16.97%	16.01%	13.36%
Cost Of Revenue	$805.2M	$3.147B	$683.6M
YoY Change	17.79%	15.37%	10.53%
Gross Profit	$161.6M	$681.9M	$142.9M
YoY Change	13.11%	19.06%	29.24%
Gross Profit Margin	16.71%	17.81%	17.29%
Selling, General & Admin	$122.5M	$480.0M	$114.3M
YoY Change	7.17%	13.05%	24.37%
% of Gross Profit	75.81%	70.39%	80.01%
Research & Development
YoY Change
% of Gross Profit
Depreciation & Amortization	$6.500M	$22.84M	$4.800M
YoY Change	35.42%	25.63%	17.07%
% of Gross Profit	4.02%	3.35%	3.36%
Operating Expenses	$128.9M	$502.9M	$119.2M
YoY Change	8.14%	13.57%	24.04%
Operating Profit	$32.62M	$179.0M	$23.71M
YoY Change	37.56%	37.78%	63.9%
Interest Expense	$1.400M	$4.668M	$400.0K
YoY Change	250.0%	45.28%	-500.0%
% of Operating Profit	4.29%	2.61%	1.69%
Other Income/Expense, Net
YoY Change
Pretax Income	$34.00M	$182.4M	$24.10M
YoY Change	41.08%	40.12%	68.53%
Income Tax	$9.300M	$46.95M	$6.000M
% Of Pretax Income	27.35%	25.74%	24.9%
Net Earnings	$24.66M	$135.4M	$15.55M
YoY Change	58.51%	60.44%	63.38%
Net Earnings / Revenue	2.55%	3.54%	1.88%
Basic Earnings Per Share	$0.59	$3.24	$0.36
Diluted Earnings Per Share	$0.59	$3.22	$0.36
COMMON SHARES
Basic Shares Outstanding	41.81M shares	41.22M shares	20.84M shares
Diluted Shares Outstanding

Balance Sheet

Concept	2018 Q4	2018	2017 Q4
SHORT-TERM ASSETS
Cash & Short-Term Investments	$387.6M	$387.6M	$356.2M
YoY Change	8.82%	8.82%	23.72%
Cash & Equivalents	$326.8M	$326.8M	$354.3M
Short-Term Investments	$60.80M	$60.80M	$2.000M
Other Short-Term Assets	$27.72M	$78.30M	$26.99M
YoY Change	2.7%	-0.76%	38.23%
Inventory
Prepaid Expenses
Receivables	$10.02M	$99.80M	$12.29M
Other Receivables	$300.8M	$300.8M	$256.9M
Total Short-Term Assets	$866.5M	$866.5M	$778.9M
YoY Change	11.25%	11.25%	21.65%
LONG-TERM ASSETS
Property, Plant & Equipment	$117.2M	$117.2M	$95.66M
YoY Change	22.53%	22.47%	19.18%
Goodwill	$12.69M		$12.69M
YoY Change	0.0%		0.0%
Intangibles
YoY Change
Long-Term Investments
YoY Change
Other Assets	$4.851M	$195.3M	$3.541M
YoY Change	37.0%	10.78%	92.45%
Total Long-Term Assets	$325.3M	$325.3M	$284.8M
YoY Change	14.23%	14.22%	6.71%
TOTAL ASSETS
Total Short-Term Assets	$866.5M	$866.5M	$778.9M
Total Long-Term Assets	$325.3M	$325.3M	$284.8M
Total Assets	$1.192B	$1.192B	$1.064B
YoY Change	12.04%	12.04%	17.25%
SHORT-TERM LIABILITIES
YoY Change
Accounts Payable	$10.62M	$10.60M	$6.447M
YoY Change	64.76%	65.63%	53.9%
Accrued Expenses	$28.89M	$761.7M	$25.99M
YoY Change	11.16%	5.79%	15.83%
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	$772.3M	$772.3M	$724.7M
YoY Change	6.57%	6.3%	20.6%
LONG-TERM LIABILITIES
Long-Term Debt	$144.4M	$144.4M	$104.4M
YoY Change	38.31%	38.31%	0.0%
Other Long-Term Liabilities	$9.996M	$197.4M	$1.752M
YoY Change	470.55%	18.56%	-98.76%
Total Long-Term Liabilities	$341.8M	$341.8M	$272.6M
YoY Change	25.37%	26.17%	10.97%
TOTAL LIABILITIES
Total Short-Term Liabilities	$772.3M	$772.3M	$724.7M
Total Long-Term Liabilities	$341.8M	$341.8M	$272.6M
Total Liabilities	$1.114B	$1.114B	$997.4M
YoY Change	11.71%	11.7%	17.8%
SHAREHOLDERS EQUITY
Retained Earnings	$397.9M		$296.8M
YoY Change	34.08%		6.7%
Common Stock	$37.31M		$25.89M
YoY Change	44.09%		172.06%
Preferred Stock
YoY Change
Treasury Stock (at cost)	$357.6M		$256.4M
YoY Change	39.48%		12.86%
Treasury Stock Shares	14.56M shares		14.01M shares
Shareholders Equity	$77.68M	$77.70M	$66.32M
YoY Change
Total Liabilities & Shareholders Equity	$1.192B	$1.192B	$1.064B
YoY Change	12.04%	12.04%	17.25%

Cashflow Statement

Concept	2018 Q4	2018	2017 Q4
OPERATING ACTIVITIES
Net Income	$24.66M	$135.4M	$15.55M
YoY Change	58.51%	60.44%	63.38%
Depreciation, Depletion And Amortization	$6.500M	$22.84M	$4.800M
YoY Change	35.42%	25.63%	17.07%
Cash From Operating Activities	$114.2M	$184.5M	$144.8M
YoY Change	-21.13%	-13.47%	30.92%
INVESTING ACTIVITIES
Capital Expenditures	-$13.80M	$35.33M	-$6.800M
YoY Change	102.94%	5.97%	-46.46%
Acquisitions
YoY Change
Other Investing Activities	-$23.00M	-$58.80M	$300.0K
YoY Change	-7766.67%	-58900.0%
Cash From Investing Activities	-$36.80M	-$94.14M	-$6.600M
YoY Change	457.58%	183.13%	-48.03%
FINANCING ACTIVITIES
Cash Dividend Paid
YoY Change
Common Stock Issuance & Retirement, Net		$0.00
YoY Change
Debt Paid & Issued, Net
YoY Change
Cash From Financing Activities	-64.70M	-$104.5M	-59.10M
YoY Change	9.48%	1.49%	160.35%
NET CHANGE
Cash From Operating Activities	114.2M	$184.5M	144.8M
Cash From Investing Activities	-36.80M	-$94.14M	-6.600M
Cash From Financing Activities	-64.70M	-$104.5M	-59.10M
Net Change In Cash	12.70M	-$14.14M	79.10M
YoY Change	-83.94%	-118.36%	5.19%
FREE CASH FLOW
Cash From Operating Activities	$114.2M	$184.5M	$144.8M
Capital Expenditures	-$13.80M	$35.33M	-$6.800M
Free Cash Flow	$128.0M	$149.2M	$151.6M
YoY Change	-15.57%	-17.08%	22.95%

Facts In Submission

Frame	Concept Type	Concept / XBRL Key	Value	Unit
CY2018	dei	Amendment Flag AmendmentFlag	false
CY2018	dei	Current Fiscal Year End Date CurrentFiscalYearEndDate	--12-31
CY2018	dei	Document Fiscal Period Focus DocumentFiscalPeriodFocus	FY
CY2018	dei	Document Fiscal Year Focus DocumentFiscalYearFocus	2018
CY2018	dei	Document Period End Date DocumentPeriodEndDate	2018-12-31
CY2018	dei	Document Type DocumentType	10-K
CY2018	dei	Entity Central Index Key EntityCentralIndexKey	0001000753
CY2019Q1	dei	Entity Common Stock Shares Outstanding EntityCommonStockSharesOutstanding	40937606	shares
CY2018	dei	Entity Current Reporting Status EntityCurrentReportingStatus	Yes
CY2018	dei	Entity Emerging Growth Company EntityEmergingGrowthCompany	false
CY2018	dei	Entity Filer Category EntityFilerCategory	Large Accelerated Filer
CY2018Q2	dei	Entity Public Float EntityPublicFloat	3635951485	USD
CY2018	dei	Entity Registrant Name EntityRegistrantName	INSPERITY, INC.
CY2018	dei	Entity Shell Company EntityShellCompany	false
CY2018	dei	Entity Small Business EntitySmallBusiness	false
CY2018	dei	Entity Voluntary Filers EntityVoluntaryFilers	No
CY2018	dei	Entity Well Known Seasoned Issuer EntityWellKnownSeasonedIssuer	Yes
CY2018	nsp	Accounts Receivable Due Date Prior To Applicable Payroll Date AccountsReceivableDueDatePriorToApplicablePayrollDate	P1D
CY2017Q4	nsp	Accrued Corporate Payroll And Commissions Earned AccruedCorporatePayrollAndCommissionsEarned	52595000	USD
CY2018Q4	nsp	Accrued Corporate Payroll And Commissions Earned AccruedCorporatePayrollAndCommissionsEarned	60704000	USD
CY2016	nsp	Accrued Corporate Payroll Commissions And Other Accrued Liabilities AccruedCorporatePayrollCommissionsAndOtherAccruedLiabilities	3150000	USD
CY2017	nsp	Accrued Corporate Payroll Commissions And Other Accrued Liabilities AccruedCorporatePayrollCommissionsAndOtherAccruedLiabilities	17138000	USD
CY2018	nsp	Accrued Corporate Payroll Commissions And Other Accrued Liabilities AccruedCorporatePayrollCommissionsAndOtherAccruedLiabilities	8941000	USD
CY2017Q4	nsp	Accrued Health Insurance Costs AccruedHealthInsuranceCosts	26075000	USD
CY2018Q4	nsp	Accrued Health Insurance Costs AccruedHealthInsuranceCosts	35153000	USD
CY2017Q4	nsp	Accrued Payroll Taxes And Other Payroll Deductions Current AccruedPayrollTaxesAndOtherPayrollDeductionsCurrent	303247000	USD
CY2018Q4	nsp	Accrued Payroll Taxes And Other Payroll Deductions Current AccruedPayrollTaxesAndOtherPayrollDeductionsCurrent	261166000	USD
CY2017Q4	nsp	Accrued Worksite Employee Payroll Costs AccruedWorksiteEmployeePayrollCosts	267402000	USD
CY2018Q4	nsp	Accrued Worksite Employee Payroll Costs AccruedWorksiteEmployeePayrollCosts	329979000	USD
CY2016	nsp	Adjusted Weighted Average Common Shares Outstanding AdjustedWeightedAverageCommonSharesOutstanding	41762000	shares
CY2017	nsp	Adjusted Weighted Average Common Shares Outstanding AdjustedWeightedAverageCommonSharesOutstanding	41271000	shares
CY2018	nsp	Adjusted Weighted Average Common Shares Outstanding AdjustedWeightedAverageCommonSharesOutstanding	41506000	shares
CY2018Q4	nsp	Applicable Margin30 Day Libor ApplicableMargin30DayLibor	0.0200
CY2018Q4	nsp	Applicable Margin Federal Funds Rate ApplicableMarginFederalFundsRate	0.0050
CY2018Q4	nsp	Benefits Costs Incurred Relatedto Runoff BenefitsCostsIncurredRelatedtoRunoff	-1300000	USD
CY2016Q4	nsp	Benefits Costs Incurred Relatedto Runoff BenefitsCostsIncurredRelatedtoRunoff	5100000	USD
CY2017Q4	nsp	Benefits Costs Incurred Relatedto Runoff BenefitsCostsIncurredRelatedtoRunoff	1200000	USD
CY2017	nsp	Incremental Shares From Assumed Conversions Of Common Stock Options IncrementalSharesFromAssumedConversionsOfCommonStockOptions	204000	shares
CY2018	nsp	Percentage Of Subsidiary Stock Securing Debt PercentageOfSubsidiaryStockSecuringDebt	0.65
CY2018	nsp	Incremental Shares From Assumed Conversions Of Common Stock Options IncrementalSharesFromAssumedConversionsOfCommonStockOptions	289000	shares
CY2016	nsp	Marketable Securities Proceeds From Dispositions MarketableSecuritiesProceedsFromDispositions	7268000	USD
CY2017	nsp	Marketable Securities Proceeds From Dispositions MarketableSecuritiesProceedsFromDispositions	0	USD
CY2017Q4	nsp	Client Prepayments Included In Cash Balance ClientPrepaymentsIncludedInCashBalance	23603000	USD
CY2018Q4	nsp	Client Prepayments Included In Cash Balance ClientPrepaymentsIncludedInCashBalance	34177000	USD
CY2017Q4	nsp	Computer Hardware And Software ComputerHardwareAndSoftware	105060000	USD
CY2018Q4	nsp	Computer Hardware And Software ComputerHardwareAndSoftware	115259000	USD
CY2016	nsp	Decrease Increase In Accrued Workers Compensation Costs For Changes In Estimated Losses DecreaseIncreaseInAccruedWorkersCompensationCostsForChangesInEstimatedLosses	10900000	USD
CY2017	nsp	Decrease Increase In Accrued Workers Compensation Costs For Changes In Estimated Losses DecreaseIncreaseInAccruedWorkersCompensationCostsForChangesInEstimatedLosses	16300000	USD
CY2018	nsp	Decrease Increase In Accrued Workers Compensation Costs For Changes In Estimated Losses DecreaseIncreaseInAccruedWorkersCompensationCostsForChangesInEstimatedLosses	18800000	USD
CY2017Q4	nsp	Deposits Health Insurance DepositsHealthInsurance	5300000	USD
CY2018Q4	nsp	Deposits Health Insurance DepositsHealthInsurance	6200000	USD
CY2017Q4	nsp	Deposits Workers Compensation DepositsWorkersCompensation	154215000	USD
CY2018Q4	nsp	Deposits Workers Compensation DepositsWorkersCompensation	166474000	USD
CY2017	nsp	Enactmentof Us Tax Reform EnactmentofUSTaxReform	2500000	USD
CY2018	nsp	Future Non Cancelable Purchase And Service Obligations Disclosure Threshold FutureNonCancelablePurchaseAndServiceObligationsDisclosureThreshold	greater than $100,000 and one year
CY2017Q4	nsp	Goodwill And Other Intangible Assets Net GoodwillAndOtherIntangibleAssetsNet	12762000	USD
CY2018Q4	nsp	Goodwill And Other Intangible Assets Net GoodwillAndOtherIntangibleAssetsNet	12726000	USD
CY2016	nsp	Gross Billings GrossBillings	17932857000	USD
CY2017	nsp	Gross Billings GrossBillings	20173812000	USD
CY2018	nsp	Gross Billings GrossBillings	23830731000	USD
CY2016	nsp	Incremental Shares From Assumed Conversions Of Common Stock Options IncrementalSharesFromAssumedConversionsOfCommonStockOptions	94000	shares
CY2018	nsp	Marketable Securities Proceeds From Dispositions MarketableSecuritiesProceedsFromDispositions	16299000	USD
CY2016Q1	nsp	Max Amount Of Tender Offer For Repurchase Of Shares MaxAmountOfTenderOfferForRepurchaseOfShares	125000000	USD
CY2017Q4	nsp	Money Market Funds Overnight Holdings At Carrying Value MoneyMarketFundsOvernightHoldingsAtCarryingValue	338112000	USD
CY2018Q4	nsp	Money Market Funds Overnight Holdings At Carrying Value MoneyMarketFundsOvernightHoldingsAtCarryingValue	311158000	USD
CY2016	nsp	Net Income Loss Available To Common Shareholders Basic NetIncomeLossAvailableToCommonShareholdersBasic	64495000	USD
CY2017	nsp	Net Income Loss Available To Common Shareholders Basic NetIncomeLossAvailableToCommonShareholdersBasic	82885000	USD
CY2018	nsp	Net Income Loss Available To Common Shareholders Basic NetIncomeLossAvailableToCommonShareholdersBasic	133538000	USD
CY2018	nsp	Number Of Days In Advance Of Beginning Of Reporting Quarter Carrier Establishes Cash Funding Rates NumberOfDaysInAdvanceOfBeginningOfReportingQuarterCarrierEstablishesCashFundingRates	P90D
CY2018Q4	nsp	Number Of Stock Based Employee Compensation Plans NumberOfStockBasedEmployeeCompensationPlans	1
CY2016	nsp	Payroll Taxes Benefits And Workers Compensation Costs PayrollTaxesBenefitsAndWorkersCompensationCosts	2449737000	USD
CY2017	nsp	Payroll Taxes Benefits And Workers Compensation Costs PayrollTaxesBenefitsAndWorkersCompensationCosts	2727492000	USD
CY2018	nsp	Payroll Taxes Benefits And Workers Compensation Costs PayrollTaxesBenefitsAndWorkersCompensationCosts	3146640000	USD
CY2017Q4	nsp	Payroll Withholdings Included In Cash Balance PayrollWithholdingsIncludedInCashBalance	271500000	USD
CY2018Q4	nsp	Payroll Withholdings Included In Cash Balance PayrollWithholdingsIncludedInCashBalance	224500000	USD
CY2018	nsp	Percentageofgrantsissuedtodirectorsthatarevestedforannualawardgrants. Percentageofgrantsissuedtodirectorsthatarevestedforannualawardgrants.	1.00
CY2018Q4	nsp	Portionofinsurancecoststhatislessthantheagreeduponsurplusincludedinaccruedhealthinsurancecostsacntliab Portionofinsurancecoststhatislessthantheagreeduponsurplusincludedinaccruedhealthinsurancecostsacntliab	-15300000	USD
CY2018Q4	nsp	Premiums Owed To United PremiumsOwedToUnited	15200000	USD
CY2017Q4	nsp	Prepaid Health Insurance PrepaidHealthInsurance	9000000	USD
CY2018Q4	nsp	Prepaid Health Insurance PrepaidHealthInsurance	9000000	USD
CY2018Q4	nsp	Prepaid Health Insurance Current And Noncurrent PrepaidHealthInsuranceCurrentAndNoncurrent	-6300000	USD
CY2016	nsp	Salaries Wages And Payroll Taxes SalariesWagesAndPayrollTaxes	229589000	USD
CY2017	nsp	Salaries Wages And Payroll Taxes SalariesWagesAndPayrollTaxes	259531000	USD
CY2018Q4	nsp	Required Deposit For Health Care Costs RequiredDepositForHealthCareCosts	6000000	USD
CY2018	nsp	Return Of Excess Claim Funds ReturnOfExcessClaimFunds	19400000	USD
CY2018	nsp	Salaries Wages And Payroll Taxes SalariesWagesAndPayrollTaxes	301027000	USD
CY2018	nsp	Workers Compensation Expense WorkersCompensationExpense	72066000	USD
CY2017Q4	nsp	Workers Compensation Liability Current Net WorkersCompensationLiabilityCurrentNet	41137000	USD
CY2017	nsp	Vestingperiodfor Initialgrantstomembersofthe Boardof Directors VestingperiodforInitialgrantstomembersoftheBoardofDirectors	P3Y
CY2018Q4	nsp	Workers Compensation Liability Current Net WorkersCompensationLiabilityCurrentNet	42227000	USD
CY2010Q4	nsp	Workers Compensation Maximum Aggregate Economic Burden For Claims In Excess Of First Layer Cap Per Policy Year WorkersCompensationMaximumAggregateEconomicBurdenForClaimsInExcessOfFirstLayerCapPerPolicyYear	6000000	USD
CY2017Q4	nsp	Software Development Costs SoftwareDevelopmentCosts	60568000	USD
CY2018Q4	nsp	Software Development Costs SoftwareDevelopmentCosts	71332000	USD
CY2014	nsp	Special Dividend SpecialDividend	50700000	USD
CY2017	nsp	Special Dividend SpecialDividend	41700000	USD
CY2017Q4	nsp	Specialdividendpershare Specialdividendpershare	1.00
CY2018	nsp	Time Period Estimate Of Incurred Claim Costs To Be Paid Included In Long Term Liabilities TimePeriodEstimateOfIncurredClaimCostsToBePaidIncludedInLongTermLiabilities	Greater than 1 year
CY2018	nsp	Time Period Estimate Of Incurred Claim Costs To Be Paid Included In Short Term Liabilities TimePeriodEstimateOfIncurredClaimCostsToBePaidIncludedInShortTermLiabilities	P1Y
CY2018	nsp	Time Period Incurred Claims Expected To Be Paid Included In Deposits TimePeriodIncurredClaimsExpectedToBePaidIncludedInDeposits	Greater than 1 year
CY2018	nsp	Time Period Incurred Claims Expected To Be Paid Recorded As Restricted Cash TimePeriodIncurredClaimsExpectedToBePaidRecordedAsRestrictedCash	P1Y
CY2016Q1	nsp	Transaction Costs Relatedto Tender Offer TransactionCostsRelatedtoTenderOffer	1100000	USD
CY2016	nsp	Treasury Stock Acquired TreasuryStockAcquired	31669000	USD
CY2017	nsp	Treasury Stock Acquired TreasuryStockAcquired	38735000	USD
CY2018	nsp	Treasury Stock Acquired TreasuryStockAcquired	113327000	USD
CY2017	nsp	Us Treasury Rates That Correspond With Weighted Average Estimated Claim Payout Period USTreasuryRatesThatCorrespondWithWeightedAverageEstimatedClaimPayoutPeriod	0.016
CY2018	nsp	Us Treasury Rates That Correspond With Weighted Average Estimated Claim Payout Period USTreasuryRatesThatCorrespondWithWeightedAverageEstimatedClaimPayoutPeriod	0.026
CY2017Q4	nsp	Unbilled Unbilled	318431000	USD
CY2018Q4	nsp	Unbilled Unbilled	385567000	USD
CY2017Q4	nsp	Unbilled Accrued Worksite Employee Payroll Costs UnbilledAccruedWorksiteEmployeePayrollCosts	267402000	USD
CY2018Q4	nsp	Unbilled Accrued Worksite Employee Payroll Costs UnbilledAccruedWorksiteEmployeePayrollCosts	329979000	USD
CY2017	nsp	Undiscounted Accrued Workers Compensation Costs UndiscountedAccruedWorkersCompensationCosts	219900000	USD
CY2018	nsp	Undiscounted Accrued Workers Compensation Costs UndiscountedAccruedWorkersCompensationCosts	247400000	USD
CY2018	nsp	Vestingperiodfor Initialgrantstomembersofthe Boardof Directors VestingperiodforInitialgrantstomembersoftheBoardofDirectors	P0Y
CY2017Q4	nsp	Workers Compensation Administrative Fees Accrued WorkersCompensationAdministrativeFeesAccrued	1800000	USD
CY2018Q4	nsp	Workers Compensation Administrative Fees Accrued WorkersCompensationAdministrativeFeesAccrued	3600000	USD
CY2017	nsp	Workers Compensation Claims Paid WorkersCompensationClaimsPaid	40184000	USD
CY2018	nsp	Workers Compensation Claims Paid WorkersCompensationClaimsPaid	42228000	USD
CY2017	nsp	Workers Compensation Discount Changed During Period WorkersCompensationDiscountChangedDuringPeriod	4308000	USD
CY2018	nsp	Workers Compensation Discount Changed During Period WorkersCompensationDiscountChangedDuringPeriod	7829000	USD
CY2017	nsp	Workers Compensation Expense WorkersCompensationExpense	68194000	USD
CY2010Q3	nsp	Workers Compensation Maximum Economic Burden First Layer Of Claims Per Occurrence WorkersCompensationMaximumEconomicBurdenFirstLayerOfClaimsPerOccurrence	1000000	USD
CY2016	nsp	Worksite Employee Payroll Cost WorksiteEmployeePayrollCost	14991510000	USD
CY2017	nsp	Worksite Employee Payroll Cost WorksiteEmployeePayrollCost	16873589000	USD
CY2018	nsp	Worksite Employee Payroll Cost WorksiteEmployeePayrollCost	20002182000	USD
CY2017Q4	us-gaap	Accounts Payable Current AccountsPayableCurrent	6447000	USD
CY2018Q4	us-gaap	Accounts Payable Current AccountsPayableCurrent	10622000	USD
CY2017Q4	us-gaap	Accounts Receivable Net Current AccountsReceivableNetCurrent	12292000	USD
CY2018Q4	us-gaap	Accounts Receivable Net Current AccountsReceivableNetCurrent	10015000	USD
CY2017Q4	us-gaap	Accrued Liabilities Current AccruedLiabilitiesCurrent	25989000	USD
CY2018Q4	us-gaap	Accrued Liabilities Current AccruedLiabilitiesCurrent	28890000	USD
CY2017Q4	us-gaap	Accumulated Depreciation Depletion And Amortization Property Plant And Equipment AccumulatedDepreciationDepletionAndAmortizationPropertyPlantAndEquipment	214690000	USD
CY2018Q4	us-gaap	Accumulated Depreciation Depletion And Amortization Property Plant And Equipment AccumulatedDepreciationDepletionAndAmortizationPropertyPlantAndEquipment	233595000	USD
CY2017Q4	us-gaap	Accumulated Other Comprehensive Income Loss Net Of Tax AccumulatedOtherComprehensiveIncomeLossNetOfTax	-5000	USD
CY2018Q4	us-gaap	Accumulated Other Comprehensive Income Loss Net Of Tax AccumulatedOtherComprehensiveIncomeLossNetOfTax	-9000	USD
CY2017Q4	us-gaap	Capitalized Computer Software Net CapitalizedComputerSoftwareNet	14900000	USD
CY2018Q4	us-gaap	Capitalized Computer Software Net CapitalizedComputerSoftwareNet	19600000	USD
CY2018Q4	us-gaap	Assets Assets	1191816000	USD
CY2017Q4	us-gaap	Assets Current AssetsCurrent	778935000	USD
CY2017Q4	us-gaap	Additional Paid In Capital Common Stock AdditionalPaidInCapitalCommonStock	25337000	USD
CY2018Q4	us-gaap	Additional Paid In Capital Common Stock AdditionalPaidInCapitalCommonStock	36752000	USD
CY2016	us-gaap	Adjustments To Additional Paid In Capital Sharebased Compensation Requisite Service Period Recognition Value AdjustmentsToAdditionalPaidInCapitalSharebasedCompensationRequisiteServicePeriodRecognitionValue	16643000	USD
CY2017	us-gaap	Adjustments To Additional Paid In Capital Sharebased Compensation Requisite Service Period Recognition Value AdjustmentsToAdditionalPaidInCapitalSharebasedCompensationRequisiteServicePeriodRecognitionValue	24345000	USD
CY2018	us-gaap	Adjustments To Additional Paid In Capital Sharebased Compensation Requisite Service Period Recognition Value AdjustmentsToAdditionalPaidInCapitalSharebasedCompensationRequisiteServicePeriodRecognitionValue	20425000	USD
CY2016	us-gaap	Adjustments To Reconcile Net Income Loss To Cash Provided By Used In Operating Activities AdjustmentsToReconcileNetIncomeLossToCashProvidedByUsedInOperatingActivities	79377000	USD
CY2017	us-gaap	Adjustments To Reconcile Net Income Loss To Cash Provided By Used In Operating Activities AdjustmentsToReconcileNetIncomeLossToCashProvidedByUsedInOperatingActivities	128800000	USD
CY2018	us-gaap	Adjustments To Reconcile Net Income Loss To Cash Provided By Used In Operating Activities AdjustmentsToReconcileNetIncomeLossToCashProvidedByUsedInOperatingActivities	49067000	USD
CY2016	us-gaap	Advertising Expense AdvertisingExpense	16447000	USD
CY2017	us-gaap	Advertising Expense AdvertisingExpense	16686000	USD
CY2018	us-gaap	Advertising Expense AdvertisingExpense	18554000	USD
CY2017Q4	us-gaap	Allowance For Doubtful Accounts Receivable Current AllowanceForDoubtfulAccountsReceivableCurrent	600000	USD
CY2018Q4	us-gaap	Allowance For Doubtful Accounts Receivable Current AllowanceForDoubtfulAccountsReceivableCurrent	1000000	USD
CY2016	us-gaap	Antidilutive Securities Excluded From Computation Of Earnings Per Share Amount AntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareAmount	0	shares
CY2017	us-gaap	Antidilutive Securities Excluded From Computation Of Earnings Per Share Amount AntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareAmount	0	shares
CY2018	us-gaap	Antidilutive Securities Excluded From Computation Of Earnings Per Share Amount AntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareAmount	0	shares
CY2017Q4	us-gaap	Assets Assets	1063695000	USD
CY2018Q4	us-gaap	Assets Current AssetsCurrent	866536000	USD
CY2017Q4	us-gaap	Assets Fair Value Disclosure AssetsFairValueDisclosure	362706000	USD
CY2018Q4	us-gaap	Assets Fair Value Disclosure AssetsFairValueDisclosure	388650000	USD
CY2018Q4	us-gaap	Available For Sale Securities Debt Maturities Within One Year Amortized Cost AvailableForSaleSecuritiesDebtMaturitiesWithinOneYearAmortizedCost	60791000	USD
CY2018Q4	us-gaap	Available For Sale Securities Debt Maturities Within One Year Fair Value AvailableForSaleSecuritiesDebtMaturitiesWithinOneYearFairValue	60781000	USD
CY2017Q4	us-gaap	Buildings And Improvements Gross BuildingsAndImprovementsGross	95615000	USD
CY2018Q4	us-gaap	Buildings And Improvements Gross BuildingsAndImprovementsGross	112308000	USD
CY2016	us-gaap	Capitalized Computer Software Amortization1 CapitalizedComputerSoftwareAmortization1	3000000	USD
CY2017	us-gaap	Capitalized Computer Software Amortization1 CapitalizedComputerSoftwareAmortization1	4100000	USD
CY2018	us-gaap	Capitalized Computer Software Amortization1 CapitalizedComputerSoftwareAmortization1	6000000	USD
CY2017Q4	us-gaap	Cash Cash	26700000	USD
CY2018Q4	us-gaap	Cash Cash	33207000	USD
CY2017Q4	us-gaap	Cash And Cash Equivalents At Carrying Value CashAndCashEquivalentsAtCarryingValue	354260000	USD
CY2018Q4	us-gaap	Cash And Cash Equivalents At Carrying Value CashAndCashEquivalentsAtCarryingValue	326773000	USD
CY2017Q4	us-gaap	Cash And Cash Equivalents Fair Value Disclosure CashAndCashEquivalentsFairValueDisclosure	360746000	USD
CY2018Q4	us-gaap	Cash And Cash Equivalents Fair Value Disclosure CashAndCashEquivalentsFairValueDisclosure	327869000	USD
CY2017Q4	us-gaap	Cash Cash Equivalents And Short Term Investments CashCashEquivalentsAndShortTermInvestments	356220000	USD
CY2018Q4	us-gaap	Cash Cash Equivalents And Short Term Investments CashCashEquivalentsAndShortTermInvestments	387554000	USD
CY2015Q4	us-gaap	Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents	443418000	USD
CY2016Q4	us-gaap	Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents	472609000	USD
CY2017Q4	us-gaap	Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents	549612000	USD
CY2018Q4	us-gaap	Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents	535474000	USD
CY2016	us-gaap	Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents Period Increase Decrease Excluding Exchange Rate Effect CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalentsPeriodIncreaseDecreaseExcludingExchangeRateEffect	29191000	USD
CY2017	us-gaap	Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents Period Increase Decrease Excluding Exchange Rate Effect CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalentsPeriodIncreaseDecreaseExcludingExchangeRateEffect	77003000	USD
CY2018	us-gaap	Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents Period Increase Decrease Excluding Exchange Rate Effect CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalentsPeriodIncreaseDecreaseExcludingExchangeRateEffect	-14138000	USD
CY2017Q4	us-gaap	Commitments And Contingencies CommitmentsAndContingencies		USD
CY2018Q4	us-gaap	Commitments And Contingencies CommitmentsAndContingencies		USD
CY2017Q1	us-gaap	Common Stock Dividends Per Share Declared CommonStockDividendsPerShareDeclared	0.125
CY2017Q2	us-gaap	Common Stock Dividends Per Share Declared CommonStockDividendsPerShareDeclared	0.150
CY2017Q3	us-gaap	Common Stock Dividends Per Share Declared CommonStockDividendsPerShareDeclared	0.150
CY2017Q4	us-gaap	Common Stock Dividends Per Share Declared CommonStockDividendsPerShareDeclared	1.150
CY2018Q1	us-gaap	Common Stock Dividends Per Share Declared CommonStockDividendsPerShareDeclared	0.20
CY2018Q2	us-gaap	Common Stock Dividends Per Share Declared CommonStockDividendsPerShareDeclared	0.20
CY2018Q3	us-gaap	Common Stock Dividends Per Share Declared CommonStockDividendsPerShareDeclared	0.20
CY2018Q4	us-gaap	Common Stock Dividends Per Share Declared CommonStockDividendsPerShareDeclared	0.20
CY2017Q4	us-gaap	Common Stock Par Or Stated Value Per Share CommonStockParOrStatedValuePerShare	0.01
CY2018Q4	us-gaap	Common Stock Par Or Stated Value Per Share CommonStockParOrStatedValuePerShare	0.01
CY2017Q4	us-gaap	Common Stock Shares Authorized CommonStockSharesAuthorized	60000000	shares
CY2018Q4	us-gaap	Common Stock Shares Authorized CommonStockSharesAuthorized	60000000	shares
CY2017Q4	us-gaap	Common Stock Shares Issued CommonStockSharesIssued	55489000	shares
CY2018Q4	us-gaap	Common Stock Shares Issued CommonStockSharesIssued	55489000	shares
CY2017Q4	us-gaap	Common Stock Value CommonStockValue	555000	USD
CY2018Q4	us-gaap	Common Stock Value CommonStockValue	555000	USD
CY2016	us-gaap	Comprehensive Income Net Of Tax Including Portion Attributable To Noncontrolling Interest ComprehensiveIncomeNetOfTaxIncludingPortionAttributableToNoncontrollingInterest	65988000	USD
CY2017	us-gaap	Comprehensive Income Net Of Tax Including Portion Attributable To Noncontrolling Interest ComprehensiveIncomeNetOfTaxIncludingPortionAttributableToNoncontrollingInterest	84400000	USD
CY2018	us-gaap	Comprehensive Income Net Of Tax Including Portion Attributable To Noncontrolling Interest ComprehensiveIncomeNetOfTaxIncludingPortionAttributableToNoncontrollingInterest	135409000	USD
CY2016	us-gaap	Current Federal Tax Expense Benefit CurrentFederalTaxExpenseBenefit	31045000	USD
CY2017	us-gaap	Current Federal Tax Expense Benefit CurrentFederalTaxExpenseBenefit	30009000	USD
CY2018	us-gaap	Current Federal Tax Expense Benefit CurrentFederalTaxExpenseBenefit	40347000	USD
CY2016	us-gaap	Current Income Tax Expense Benefit CurrentIncomeTaxExpenseBenefit	36235000	USD
CY2017	us-gaap	Current Income Tax Expense Benefit CurrentIncomeTaxExpenseBenefit	35997000	USD
CY2018	us-gaap	Current Income Tax Expense Benefit CurrentIncomeTaxExpenseBenefit	51480000	USD
CY2016	us-gaap	Current State And Local Tax Expense Benefit CurrentStateAndLocalTaxExpenseBenefit	5190000	USD
CY2017	us-gaap	Current State And Local Tax Expense Benefit CurrentStateAndLocalTaxExpenseBenefit	5988000	USD
CY2018	us-gaap	Current State And Local Tax Expense Benefit CurrentStateAndLocalTaxExpenseBenefit	11133000	USD
CY2018	us-gaap	Debt Instrument Interest Rate During Period DebtInstrumentInterestRateDuringPeriod	0.035
CY2016	us-gaap	Deferred Federal Income Tax Expense Benefit DeferredFederalIncomeTaxExpenseBenefit	2641000	USD
CY2017	us-gaap	Deferred Federal Income Tax Expense Benefit DeferredFederalIncomeTaxExpenseBenefit	9549000	USD
CY2018	us-gaap	Deferred Federal Income Tax Expense Benefit DeferredFederalIncomeTaxExpenseBenefit	-3398000	USD
CY2016	us-gaap	Deferred Income Tax Expense Benefit DeferredIncomeTaxExpenseBenefit	2951000	USD
CY2017	us-gaap	Deferred Income Tax Expense Benefit DeferredIncomeTaxExpenseBenefit	9742000	USD
CY2018	us-gaap	Deferred Income Tax Expense Benefit DeferredIncomeTaxExpenseBenefit	-4533000	USD
CY2016	us-gaap	Deferred State And Local Income Tax Expense Benefit DeferredStateAndLocalIncomeTaxExpenseBenefit	310000	USD
CY2017	us-gaap	Deferred State And Local Income Tax Expense Benefit DeferredStateAndLocalIncomeTaxExpenseBenefit	193000	USD
CY2018	us-gaap	Deferred State And Local Income Tax Expense Benefit DeferredStateAndLocalIncomeTaxExpenseBenefit	-1135000	USD
CY2017Q4	us-gaap	Deferred Tax Assets Goodwill And Intangible Assets DeferredTaxAssetsGoodwillAndIntangibleAssets	0	USD
CY2018Q4	us-gaap	Deferred Tax Assets Goodwill And Intangible Assets DeferredTaxAssetsGoodwillAndIntangibleAssets	-474000	USD
CY2017Q4	us-gaap	Deferred Tax Assets Gross DeferredTaxAssetsGross	14662000	USD
CY2018Q4	us-gaap	Deferred Tax Assets Gross DeferredTaxAssetsGross	22142000	USD
CY2017Q3	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	0.46
CY2017Q4	us-gaap	Deferred Tax Assets Investments DeferredTaxAssetsInvestments	667000	USD
CY2018Q4	us-gaap	Deferred Tax Assets Investments DeferredTaxAssetsInvestments	676000	USD
CY2017Q4	us-gaap	Deferred Tax Assets Liabilities Net DeferredTaxAssetsLiabilitiesNet	4283000	USD
CY2018Q4	us-gaap	Deferred Tax Assets Liabilities Net DeferredTaxAssetsLiabilitiesNet	8816000	USD
CY2017Q4	us-gaap	Deferred Tax Assets Liabilities Net Noncurrent DeferredTaxAssetsLiabilitiesNetNoncurrent	4283000	USD
CY2018Q4	us-gaap	Deferred Tax Assets Liabilities Net Noncurrent DeferredTaxAssetsLiabilitiesNetNoncurrent	8816000	USD
CY2017Q4	us-gaap	Deferred Tax Assets Net DeferredTaxAssetsNet	13993000	USD
CY2018Q4	us-gaap	Deferred Tax Assets Net DeferredTaxAssetsNet	21464000	USD
CY2017Q4	us-gaap	Deferred Tax Assets Operating Loss Carryforwards DeferredTaxAssetsOperatingLossCarryforwards	774000	USD
CY2018Q4	us-gaap	Deferred Tax Assets Operating Loss Carryforwards DeferredTaxAssetsOperatingLossCarryforwards	709000	USD
CY2017Q4	us-gaap	Deferred Tax Assets Tax Deferred Expense Compensation And Benefits DeferredTaxAssetsTaxDeferredExpenseCompensationAndBenefits	3510000	USD
CY2018Q4	us-gaap	Deferred Tax Assets Tax Deferred Expense Compensation And Benefits DeferredTaxAssetsTaxDeferredExpenseCompensationAndBenefits	8612000	USD
CY2017Q4	us-gaap	Deferred Tax Assets Tax Deferred Expense Compensation And Benefits Share Based Compensation Cost DeferredTaxAssetsTaxDeferredExpenseCompensationAndBenefitsShareBasedCompensationCost	4233000	USD
CY2018Q4	us-gaap	Deferred Tax Assets Tax Deferred Expense Compensation And Benefits Share Based Compensation Cost DeferredTaxAssetsTaxDeferredExpenseCompensationAndBenefitsShareBasedCompensationCost	6183000	USD
CY2017Q4	us-gaap	Deferred Tax Assets Tax Deferred Expense Other DeferredTaxAssetsTaxDeferredExpenseOther	216000	USD
CY2018Q4	us-gaap	Deferred Tax Assets Tax Deferred Expense Other DeferredTaxAssetsTaxDeferredExpenseOther	305000	USD
CY2017Q4	us-gaap	Deferred Tax Assets Tax Deferred Expense Reserves And Accruals Accrued Liabilities DeferredTaxAssetsTaxDeferredExpenseReservesAndAccrualsAccruedLiabilities	676000	USD
CY2018Q4	us-gaap	Deferred Tax Assets Tax Deferred Expense Reserves And Accruals Accrued Liabilities DeferredTaxAssetsTaxDeferredExpenseReservesAndAccrualsAccruedLiabilities	918000	USD
CY2017Q4	us-gaap	Deferred Tax Assets Tax Deferred Expense Reserves And Accruals Self Insurance DeferredTaxAssetsTaxDeferredExpenseReservesAndAccrualsSelfInsurance	4586000	USD
CY2018Q4	us-gaap	Deferred Tax Assets Tax Deferred Expense Reserves And Accruals Self Insurance DeferredTaxAssetsTaxDeferredExpenseReservesAndAccrualsSelfInsurance	4739000	USD
CY2017Q4	us-gaap	Deferred Tax Assets Valuation Allowance DeferredTaxAssetsValuationAllowance	669000	USD
CY2018Q4	us-gaap	Deferred Tax Assets Valuation Allowance DeferredTaxAssetsValuationAllowance	678000	USD
CY2017Q4	us-gaap	Deferred Tax Liabilities DeferredTaxLiabilities	9710000	USD
CY2018Q4	us-gaap	Deferred Tax Liabilities DeferredTaxLiabilities	12648000	USD
CY2017Q4	us-gaap	Deferred Tax Liabilities Deferred Expense DeferredTaxLiabilitiesDeferredExpense	3957000	USD
CY2018Q4	us-gaap	Deferred Tax Liabilities Deferred Expense DeferredTaxLiabilitiesDeferredExpense	3306000	USD
CY2017Q4	us-gaap	Deferred Tax Liabilities Deferred Expense Capitalized Software DeferredTaxLiabilitiesDeferredExpenseCapitalizedSoftware	3732000	USD
CY2018Q4	us-gaap	Deferred Tax Liabilities Deferred Expense Capitalized Software DeferredTaxLiabilitiesDeferredExpenseCapitalizedSoftware	4950000	USD
CY2017Q4	us-gaap	Deferred Tax Liabilities Property Plant And Equipment DeferredTaxLiabilitiesPropertyPlantAndEquipment	2021000	USD
CY2018Q4	us-gaap	Deferred Tax Liabilities Property Plant And Equipment DeferredTaxLiabilitiesPropertyPlantAndEquipment	3918000	USD
CY2017Q4	us-gaap	Deposits Assets Noncurrent DepositsAssetsNoncurrent	159515000	USD
CY2018Q4	us-gaap	Deposits Assets Noncurrent DepositsAssetsNoncurrent	172674000	USD
CY2016	us-gaap	Depreciation And Amortization DepreciationAndAmortization	16644000	USD
CY2017	us-gaap	Depreciation And Amortization DepreciationAndAmortization	18182000	USD
CY2018	us-gaap	Depreciation And Amortization DepreciationAndAmortization	22842000	USD
CY2016	us-gaap	Depreciation Depletion And Amortization DepreciationDepletionAndAmortization	16644000	USD
CY2017	us-gaap	Depreciation Depletion And Amortization DepreciationDepletionAndAmortization	18182000	USD
CY2018	us-gaap	Depreciation Depletion And Amortization DepreciationDepletionAndAmortization	22842000	USD
CY2016	us-gaap	Dividends Common Stock DividendsCommonStock	20599000	USD
CY2017	us-gaap	Dividends Common Stock DividendsCommonStock	65768000	USD
CY2018	us-gaap	Dividends Common Stock DividendsCommonStock	33408000	USD
CY2017Q4	us-gaap	Drafts Payable DraftsPayable	33186000	USD
CY2018Q4	us-gaap	Drafts Payable DraftsPayable	34303000	USD
CY2016	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	1.55
CY2017Q1	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	0.85
CY2017Q4	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	0.36
CY2017Q2	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	0.34
CY2018Q2	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	0.58
CY2018Q3	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	0.86
CY2017Q4	us-gaap	Furniture And Fixtures Gross FurnitureAndFixturesGross	42891000	USD
CY2018Q4	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	0.59
CY2018Q4	us-gaap	Furniture And Fixtures Gross FurnitureAndFixturesGross	45694000	USD
CY2018	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	3.22
CY2016	us-gaap	General And Administrative Expense GeneralAndAdministrativeExpense	86693000	USD
CY2017	us-gaap	General And Administrative Expense GeneralAndAdministrativeExpense	101273000	USD
CY2016	us-gaap	Effective Income Tax Rate Reconciliation At Federal Statutory Income Tax Rate EffectiveIncomeTaxRateReconciliationAtFederalStatutoryIncomeTaxRate	0.3500
CY2017	us-gaap	Effective Income Tax Rate Reconciliation At Federal Statutory Income Tax Rate EffectiveIncomeTaxRateReconciliationAtFederalStatutoryIncomeTaxRate	0.3500
CY2017	us-gaap	Employee Service Share Based Compensation Tax Benefit From Compensation Expense EmployeeServiceShareBasedCompensationTaxBenefitFromCompensationExpense	8500000	USD
CY2018	us-gaap	Employee Service Share Based Compensation Tax Benefit From Compensation Expense EmployeeServiceShareBasedCompensationTaxBenefitFromCompensationExpense	5300000	USD
CY2017	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	2.02
CY2018Q1	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	1.20
CY2018Q2	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	0.59
CY2018Q3	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	0.86
CY2018Q4	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	0.59
CY2018	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	3.24
CY2016	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	1.54
CY2017Q1	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	0.85
CY2017Q2	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	0.33
CY2017Q3	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	0.46
CY2017Q4	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	0.36
CY2017	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	2.01
CY2018Q1	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	1.18
CY2018	us-gaap	Effective Income Tax Rate Reconciliation At Federal Statutory Income Tax Rate EffectiveIncomeTaxRateReconciliationAtFederalStatutoryIncomeTaxRate	0.2100
CY2016	us-gaap	Employee Service Share Based Compensation Tax Benefit From Compensation Expense EmployeeServiceShareBasedCompensationTaxBenefitFromCompensationExpense	6200000	USD
CY2018	us-gaap	General And Administrative Expense GeneralAndAdministrativeExpense	111068000	USD
CY2017Q4	us-gaap	Goodwill Goodwill	12686000	USD
CY2018Q4	us-gaap	Goodwill Goodwill	12686000	USD
CY2017Q4	us-gaap	Goodwill Gross GoodwillGross	21156000	USD
CY2018Q4	us-gaap	Goodwill Gross GoodwillGross	21156000	USD
CY2017Q4	us-gaap	Goodwill Impaired Accumulated Impairment Loss GoodwillImpairedAccumulatedImpairmentLoss	8470000	USD
CY2018Q4	us-gaap	Goodwill Impaired Accumulated Impairment Loss GoodwillImpairedAccumulatedImpairmentLoss	8470000	USD
CY2018	us-gaap	Goodwill Impairment Loss GoodwillImpairmentLoss	0	USD
CY2016	us-gaap	Gross Profit GrossProfit	491610000	USD
CY2017Q1	us-gaap	Gross Profit GrossProfit	159346000	USD
CY2017Q2	us-gaap	Gross Profit GrossProfit	130553000	USD
CY2017Q3	us-gaap	Gross Profit GrossProfit	139966000	USD
CY2017Q4	us-gaap	Gross Profit GrossProfit	142866000	USD
CY2017	us-gaap	Gross Profit GrossProfit	572731000	USD
CY2018Q1	us-gaap	Gross Profit GrossProfit	199720000	USD
CY2018Q2	us-gaap	Gross Profit GrossProfit	154544000	USD
CY2018Q3	us-gaap	Gross Profit GrossProfit	166054000	USD
CY2018Q4	us-gaap	Gross Profit GrossProfit	161591000	USD
CY2017	us-gaap	Income Tax Reconciliation Change In Enacted Tax Rate IncomeTaxReconciliationChangeInEnactedTaxRate	2559000	USD
CY2018	us-gaap	Income Tax Reconciliation Change In Enacted Tax Rate IncomeTaxReconciliationChangeInEnactedTaxRate	0	USD
CY2016	us-gaap	Income Tax Reconciliation Deductions Qualified Production Activities IncomeTaxReconciliationDeductionsQualifiedProductionActivities	686000	USD
CY2017	us-gaap	Income Tax Reconciliation Deductions Qualified Production Activities IncomeTaxReconciliationDeductionsQualifiedProductionActivities	875000	USD
CY2018	us-gaap	Income Tax Reconciliation Deductions Qualified Production Activities IncomeTaxReconciliationDeductionsQualifiedProductionActivities	0	USD
CY2016	us-gaap	Income Tax Reconciliation Income Tax Expense Benefit At Federal Statutory Income Tax Rate IncomeTaxReconciliationIncomeTaxExpenseBenefitAtFederalStatutoryIncomeTaxRate	36812000	USD
CY2017	us-gaap	Income Tax Reconciliation Income Tax Expense Benefit At Federal Statutory Income Tax Rate IncomeTaxReconciliationIncomeTaxExpenseBenefitAtFederalStatutoryIncomeTaxRate	45549000	USD
CY2018	us-gaap	Gross Profit GrossProfit	681909000	USD
CY2016	us-gaap	Income Loss From Continuing Operations Before Income Taxes Minority Interest And Income Loss From Equity Method Investments IncomeLossFromContinuingOperationsBeforeIncomeTaxesMinorityInterestAndIncomeLossFromEquityMethodInvestments	105177000	USD
CY2017	us-gaap	Income Loss From Continuing Operations Before Income Taxes Minority Interest And Income Loss From Equity Method Investments IncomeLossFromContinuingOperationsBeforeIncomeTaxesMinorityInterestAndIncomeLossFromEquityMethodInvestments	130141000	USD
CY2018	us-gaap	Income Loss From Continuing Operations Before Income Taxes Minority Interest And Income Loss From Equity Method Investments IncomeLossFromContinuingOperationsBeforeIncomeTaxesMinorityInterestAndIncomeLossFromEquityMethodInvestments	182360000	USD
CY2016	us-gaap	Income Tax Expense Benefit IncomeTaxExpenseBenefit	39186000	USD
CY2017	us-gaap	Income Tax Expense Benefit IncomeTaxExpenseBenefit	45739000	USD
CY2018	us-gaap	Income Tax Expense Benefit IncomeTaxExpenseBenefit	46947000	USD
CY2016	us-gaap	Income Tax Reconciliation Change In Enacted Tax Rate IncomeTaxReconciliationChangeInEnactedTaxRate	0	USD
CY2018	us-gaap	Income Tax Reconciliation Income Tax Expense Benefit At Federal Statutory Income Tax Rate IncomeTaxReconciliationIncomeTaxExpenseBenefitAtFederalStatutoryIncomeTaxRate	38296000	USD
CY2016	us-gaap	Income Tax Reconciliation Nondeductible Expense IncomeTaxReconciliationNondeductibleExpense	1669000	USD
CY2017	us-gaap	Income Tax Reconciliation Nondeductible Expense IncomeTaxReconciliationNondeductibleExpense	2649000	USD
CY2018	us-gaap	Income Tax Reconciliation Nondeductible Expense IncomeTaxReconciliationNondeductibleExpense	4831000	USD
CY2016	us-gaap	Income Tax Reconciliation Nondeductible Expense Share Based Compensation Cost IncomeTaxReconciliationNondeductibleExpenseShareBasedCompensationCost	-1338000	USD
CY2017	us-gaap	Income Tax Reconciliation Nondeductible Expense Share Based Compensation Cost IncomeTaxReconciliationNondeductibleExpenseShareBasedCompensationCost	-6218000	USD
CY2018	us-gaap	Income Tax Reconciliation Nondeductible Expense Share Based Compensation Cost IncomeTaxReconciliationNondeductibleExpenseShareBasedCompensationCost	-2737000	USD
CY2016	us-gaap	Income Tax Reconciliation Other Adjustments IncomeTaxReconciliationOtherAdjustments	-204000	USD
CY2017	us-gaap	Income Tax Reconciliation Other Adjustments IncomeTaxReconciliationOtherAdjustments	-707000	USD
CY2018	us-gaap	Income Tax Reconciliation Other Adjustments IncomeTaxReconciliationOtherAdjustments	-247000	USD
CY2016	us-gaap	Income Tax Reconciliation State And Local Income Taxes IncomeTaxReconciliationStateAndLocalIncomeTaxes	3684000	USD
CY2017	us-gaap	Income Tax Reconciliation State And Local Income Taxes IncomeTaxReconciliationStateAndLocalIncomeTaxes	4085000	USD
CY2018	us-gaap	Income Tax Reconciliation State And Local Income Taxes IncomeTaxReconciliationStateAndLocalIncomeTaxes	7660000	USD
CY2016	us-gaap	Income Tax Reconciliation Tax Credits Other IncomeTaxReconciliationTaxCreditsOther	0	USD
CY2017	us-gaap	Income Tax Reconciliation Tax Credits Other IncomeTaxReconciliationTaxCreditsOther	669000	USD
CY2018	us-gaap	Income Tax Reconciliation Tax Credits Other IncomeTaxReconciliationTaxCreditsOther	0	USD
CY2016	us-gaap	Income Tax Reconciliation Tax Credits Research IncomeTaxReconciliationTaxCreditsResearch	751000	USD
CY2017	us-gaap	Income Tax Reconciliation Tax Credits Research IncomeTaxReconciliationTaxCreditsResearch	634000	USD
CY2018	us-gaap	Income Tax Reconciliation Tax Credits Research IncomeTaxReconciliationTaxCreditsResearch	856000	USD
CY2016	us-gaap	Income Taxes Paid IncomeTaxesPaid	44148000	USD
CY2017	us-gaap	Income Taxes Paid IncomeTaxesPaid	40872000	USD
CY2018	us-gaap	Income Taxes Paid IncomeTaxesPaid	40730000	USD
CY2017Q4	us-gaap	Income Taxes Receivable IncomeTaxesReceivable	9824000	USD
CY2018Q4	us-gaap	Income Taxes Receivable IncomeTaxesReceivable	0	USD
CY2016	us-gaap	Increase Decrease In Accounts Payable Trade IncreaseDecreaseInAccountsPayableTrade	-1192000	USD
CY2017	us-gaap	Increase Decrease In Accounts Payable Trade IncreaseDecreaseInAccountsPayableTrade	2258000	USD
CY2018	us-gaap	Increase Decrease In Accounts Payable Trade IncreaseDecreaseInAccountsPayableTrade	4175000	USD
CY2016	us-gaap	Increase Decrease In Accounts Receivable IncreaseDecreaseInAccountsReceivable	69619000	USD
CY2017	us-gaap	Increase Decrease In Accounts Receivable IncreaseDecreaseInAccountsReceivable	63697000	USD
CY2018	us-gaap	Increase Decrease In Accounts Receivable IncreaseDecreaseInAccountsReceivable	66642000	USD
CY2016	us-gaap	Increase Decrease In Accrued Salaries IncreaseDecreaseInAccruedSalaries	53297000	USD
CY2016Q4	us-gaap	Liability For Uncertain Tax Positions Current LiabilityForUncertainTaxPositionsCurrent	0	USD
CY2017	us-gaap	Increase Decrease In Accrued Salaries IncreaseDecreaseInAccruedSalaries	52188000	USD
CY2018	us-gaap	Increase Decrease In Accrued Salaries IncreaseDecreaseInAccruedSalaries	62577000	USD
CY2016	us-gaap	Increase Decrease In Health Care Insurance Liabilities IncreaseDecreaseInHealthCareInsuranceLiabilities	12717000	USD
CY2017	us-gaap	Increase Decrease In Health Care Insurance Liabilities IncreaseDecreaseInHealthCareInsuranceLiabilities	-285000	USD
CY2018	us-gaap	Increase Decrease In Health Care Insurance Liabilities IncreaseDecreaseInHealthCareInsuranceLiabilities	9078000	USD
CY2016	us-gaap	Increase Decrease In Income Taxes IncreaseDecreaseInIncomeTaxes	-7920000	USD
CY2017	us-gaap	Increase Decrease In Income Taxes IncreaseDecreaseInIncomeTaxes	-4875000	USD
CY2018	us-gaap	Increase Decrease In Income Taxes IncreaseDecreaseInIncomeTaxes	10749000	USD
CY2016	us-gaap	Increase Decrease In Other Current Assets IncreaseDecreaseInOtherCurrentAssets	2391000	USD
CY2017	us-gaap	Increase Decrease In Other Current Assets IncreaseDecreaseInOtherCurrentAssets	7465000	USD
CY2018	us-gaap	Increase Decrease In Other Current Assets IncreaseDecreaseInOtherCurrentAssets	730000	USD
CY2016	us-gaap	Increase Decrease In Other Employee Related Liabilities IncreaseDecreaseInOtherEmployeeRelatedLiabilities	42373000	USD
CY2017	us-gaap	Increase Decrease In Other Employee Related Liabilities IncreaseDecreaseInOtherEmployeeRelatedLiabilities	55481000	USD
CY2018	us-gaap	Increase Decrease In Other Employee Related Liabilities IncreaseDecreaseInOtherEmployeeRelatedLiabilities	-42081000	USD
CY2016	us-gaap	Increase Decrease In Other Operating Assets IncreaseDecreaseInOtherOperatingAssets	1465000	USD
CY2017	us-gaap	Increase Decrease In Other Operating Assets IncreaseDecreaseInOtherOperatingAssets	2496000	USD
CY2018	us-gaap	Increase Decrease In Other Operating Assets IncreaseDecreaseInOtherOperatingAssets	2005000	USD
CY2016	us-gaap	Increase Decrease In Prepaid Expense IncreaseDecreaseInPrepaidExpense	7624000	USD
CY2017	us-gaap	Increase Decrease In Prepaid Expense IncreaseDecreaseInPrepaidExpense	-4259000	USD
CY2018	us-gaap	Increase Decrease In Prepaid Expense IncreaseDecreaseInPrepaidExpense	-2371000	USD
CY2016	us-gaap	Increase Decrease In Workers Compensation Liabilities IncreaseDecreaseInWorkersCompensationLiabilities	21723000	USD
CY2017	us-gaap	Increase Decrease In Workers Compensation Liabilities IncreaseDecreaseInWorkersCompensationLiabilities	23945000	USD
CY2018	us-gaap	Increase Decrease In Workers Compensation Liabilities IncreaseDecreaseInWorkersCompensationLiabilities	23763000	USD
CY2016	us-gaap	Interest Expense InterestExpense	2396000	USD
CY2017	us-gaap	Interest Expense InterestExpense	3213000	USD
CY2018	us-gaap	Interest Expense InterestExpense	4668000	USD
CY2016	us-gaap	Interest Income Other InterestIncomeOther	1267000	USD
CY2017	us-gaap	Interest Income Other InterestIncomeOther	3413000	USD
CY2018	us-gaap	Interest Income Other InterestIncomeOther	7992000	USD
CY2016	us-gaap	Interest Paid InterestPaid	2396000	USD
CY2017	us-gaap	Interest Paid InterestPaid	3213000	USD
CY2018	us-gaap	Interest Paid InterestPaid	4668000	USD
CY2016	us-gaap	Investment Income Net Amortization Of Discount And Premium InvestmentIncomeNetAmortizationOfDiscountAndPremium	-90000	USD
CY2017	us-gaap	Investment Income Net Amortization Of Discount And Premium InvestmentIncomeNetAmortizationOfDiscountAndPremium	-80000	USD
CY2018	us-gaap	Investment Income Net Amortization Of Discount And Premium InvestmentIncomeNetAmortizationOfDiscountAndPremium	-137000	USD
CY2017Q4	us-gaap	Investments Fair Value Disclosure InvestmentsFairValueDisclosure	1960000	USD
CY2018Q4	us-gaap	Investments Fair Value Disclosure InvestmentsFairValueDisclosure	10634000	USD
CY2017Q4	us-gaap	Land Land	6215000	USD
CY2018Q4	us-gaap	Land Land	6215000	USD
CY2018Q4	us-gaap	Letters Of Credit Outstanding Amount LettersOfCreditOutstandingAmount	1000000	USD
CY2017Q4	us-gaap	Liabilities And Stockholders Equity LiabilitiesAndStockholdersEquity	1063695000	USD
CY2018Q4	us-gaap	Liabilities And Stockholders Equity LiabilitiesAndStockholdersEquity	1191816000	USD
CY2017Q4	us-gaap	Liabilities Current LiabilitiesCurrent	724729000	USD
CY2018Q4	us-gaap	Liabilities Current LiabilitiesCurrent	772332000	USD
CY2017Q4	us-gaap	Liabilities Noncurrent LiabilitiesNoncurrent	272645000	USD
CY2018Q4	us-gaap	Liabilities Noncurrent LiabilitiesNoncurrent	341808000	USD
CY2017Q4	us-gaap	Liability For Uncertain Tax Positions Current LiabilityForUncertainTaxPositionsCurrent	0	USD
CY2018Q4	us-gaap	Liability For Uncertain Tax Positions Current LiabilityForUncertainTaxPositionsCurrent	0	USD
CY2018Q4	us-gaap	Line Of Credit Facility Current Borrowing Capacity LineOfCreditFacilityCurrentBorrowingCapacity	200000000	USD
CY2018Q1	us-gaap	Line Of Credit Facility Current Borrowing Capacity LineOfCreditFacilityCurrentBorrowingCapacity	350000000	USD
CY2018Q4	us-gaap	Line Of Credit Facility Maximum Borrowing Capacity LineOfCreditFacilityMaximumBorrowingCapacity	400000000	USD
CY2018	us-gaap	Line Of Credit Facility Unused Capacity Commitment Fee Percentage LineOfCreditFacilityUnusedCapacityCommitmentFeePercentage	0.0025
CY2017Q4	us-gaap	Long Term Debt Noncurrent LongTermDebtNoncurrent	104400000	USD
CY2018Q4	us-gaap	Long Term Debt Noncurrent LongTermDebtNoncurrent	144400000	USD
CY2017Q4	us-gaap	Marketable Securities Current MarketableSecuritiesCurrent	1960000	USD
CY2018Q4	us-gaap	Marketable Securities Current MarketableSecuritiesCurrent	60781000	USD
CY2016	us-gaap	Net Cash Provided By Used In Financing Activities NetCashProvidedByUsedInFinancingActivities	-90160000	USD
CY2017	us-gaap	Net Cash Provided By Used In Financing Activities NetCashProvidedByUsedInFinancingActivities	-102949000	USD
CY2018	us-gaap	Net Cash Provided By Used In Financing Activities NetCashProvidedByUsedInFinancingActivities	-104478000	USD
CY2016	us-gaap	Net Cash Provided By Used In Investing Activities NetCashProvidedByUsedInInvestingActivities	-26017000	USD
CY2017	us-gaap	Net Cash Provided By Used In Investing Activities NetCashProvidedByUsedInInvestingActivities	-33250000	USD
CY2018	us-gaap	Net Cash Provided By Used In Investing Activities NetCashProvidedByUsedInInvestingActivities	-94140000	USD
CY2016	us-gaap	Net Cash Provided By Used In Operating Activities NetCashProvidedByUsedInOperatingActivities	145368000	USD
CY2017	us-gaap	Net Cash Provided By Used In Operating Activities NetCashProvidedByUsedInOperatingActivities	213202000	USD
CY2018	us-gaap	Net Cash Provided By Used In Operating Activities NetCashProvidedByUsedInOperatingActivities	184480000	USD
CY2016	us-gaap	Net Income Loss NetIncomeLoss	65991000	USD
CY2017Q1	us-gaap	Net Income Loss NetIncomeLoss	35628000	USD
CY2017Q2	us-gaap	Net Income Loss NetIncomeLoss	14018000	USD
CY2017Q3	us-gaap	Net Income Loss NetIncomeLoss	19202000	USD
CY2017Q4	us-gaap	Net Income Loss NetIncomeLoss	15554000	USD
CY2017	us-gaap	Net Income Loss NetIncomeLoss	84402000	USD
CY2018Q1	us-gaap	Net Income Loss NetIncomeLoss	49991000	USD
CY2018Q2	us-gaap	Net Income Loss NetIncomeLoss	24560000	USD
CY2018Q3	us-gaap	Net Income Loss NetIncomeLoss	36207000	USD
CY2018Q4	us-gaap	Net Income Loss NetIncomeLoss	24655000	USD
CY2018	us-gaap	Net Income Loss NetIncomeLoss	135413000	USD
CY2016	us-gaap	New Accounting Pronouncement Or Change In Accounting Principle Effect Of Adoption Quantification NewAccountingPronouncementOrChangeInAccountingPrincipleEffectOfAdoptionQuantification	1500000	USD
CY2017	us-gaap	New Accounting Pronouncement Or Change In Accounting Principle Effect Of Adoption Quantification NewAccountingPronouncementOrChangeInAccountingPrincipleEffectOfAdoptionQuantification	6800000	USD
CY2018	us-gaap	New Accounting Pronouncement Or Change In Accounting Principle Effect Of Adoption Quantification NewAccountingPronouncementOrChangeInAccountingPrincipleEffectOfAdoptionQuantification	2700000	USD
CY2018	us-gaap	Number Of Reportable Segments NumberOfReportableSegments	1
CY2016	us-gaap	Operating Expenses OperatingExpenses	385304000	USD
CY2017	us-gaap	Operating Expenses OperatingExpenses	442790000	USD
CY2018	us-gaap	Operating Expenses OperatingExpenses	502873000	USD
CY2016	us-gaap	Operating Income Loss OperatingIncomeLoss	106306000	USD
CY2017Q1	us-gaap	Operating Income Loss OperatingIncomeLoss	53492000	USD
CY2017Q2	us-gaap	Operating Income Loss OperatingIncomeLoss	22938000	USD
CY2017Q3	us-gaap	Operating Income Loss OperatingIncomeLoss	29799000	USD
CY2017Q4	us-gaap	Operating Income Loss OperatingIncomeLoss	23712000	USD
CY2017	us-gaap	Operating Income Loss OperatingIncomeLoss	129941000	USD
CY2018Q1	us-gaap	Operating Income Loss OperatingIncomeLoss	64703000	USD
CY2018Q4	us-gaap	Revenue From Contract With Customer Excluding Assessed Tax RevenueFromContractWithCustomerExcludingAssessedTax	966756000	USD
CY2018	us-gaap	Revenue From Contract With Customer Excluding Assessed Tax RevenueFromContractWithCustomerExcludingAssessedTax	3828549000	USD
CY2018Q2	us-gaap	Operating Income Loss OperatingIncomeLoss	33581000	USD
CY2018Q3	us-gaap	Operating Income Loss OperatingIncomeLoss	48133000	USD
CY2018Q4	us-gaap	Operating Income Loss OperatingIncomeLoss	32619000	USD
CY2018	us-gaap	Operating Income Loss OperatingIncomeLoss	179036000	USD
CY2018Q4	us-gaap	Operating Leases Future Minimum Payments Due OperatingLeasesFutureMinimumPaymentsDue	93851000	USD
CY2018Q4	us-gaap	Operating Leases Future Minimum Payments Due Current OperatingLeasesFutureMinimumPaymentsDueCurrent	16542000	USD
CY2018Q4	us-gaap	Operating Leases Future Minimum Payments Due In Five Years OperatingLeasesFutureMinimumPaymentsDueInFiveYears	10623000	USD
CY2018Q4	us-gaap	Operating Leases Future Minimum Payments Due In Four Years OperatingLeasesFutureMinimumPaymentsDueInFourYears	12791000	USD
CY2018Q4	us-gaap	Operating Leases Future Minimum Payments Due In Three Years OperatingLeasesFutureMinimumPaymentsDueInThreeYears	13932000	USD
CY2018Q4	us-gaap	Operating Leases Future Minimum Payments Due In Two Years OperatingLeasesFutureMinimumPaymentsDueInTwoYears	16325000	USD
CY2018Q4	us-gaap	Operating Leases Future Minimum Payments Due Thereafter OperatingLeasesFutureMinimumPaymentsDueThereafter	23638000	USD
CY2016	us-gaap	Operating Leases Rent Expense Net OperatingLeasesRentExpenseNet	15000000	USD
CY2017	us-gaap	Operating Leases Rent Expense Net OperatingLeasesRentExpenseNet	15400000	USD
CY2018	us-gaap	Operating Leases Rent Expense Net OperatingLeasesRentExpenseNet	15400000	USD
CY2017Q4	us-gaap	Other Assets Current OtherAssetsCurrent	26991000	USD
CY2018Q4	us-gaap	Other Assets Current OtherAssetsCurrent	27721000	USD
CY2017Q4	us-gaap	Other Assets Noncurrent OtherAssetsNoncurrent	3541000	USD
CY2018Q4	us-gaap	Other Assets Noncurrent OtherAssetsNoncurrent	4851000	USD
CY2016	us-gaap	Other Comprehensive Income Unrealized Holding Gain Loss On Securities Arising During Period Net Of Tax OtherComprehensiveIncomeUnrealizedHoldingGainLossOnSecuritiesArisingDuringPeriodNetOfTax	-3000	USD
CY2017	us-gaap	Other Comprehensive Income Unrealized Holding Gain Loss On Securities Arising During Period Net Of Tax OtherComprehensiveIncomeUnrealizedHoldingGainLossOnSecuritiesArisingDuringPeriodNetOfTax	-2000	USD
CY2018	us-gaap	Other Comprehensive Income Unrealized Holding Gain Loss On Securities Arising During Period Net Of Tax OtherComprehensiveIncomeUnrealizedHoldingGainLossOnSecuritiesArisingDuringPeriodNetOfTax	-4000	USD
CY2017Q4	us-gaap	Other Liabilities Noncurrent OtherLiabilitiesNoncurrent	1752000	USD
CY2018Q4	us-gaap	Other Liabilities Noncurrent OtherLiabilitiesNoncurrent	9996000	USD
CY2017Q4	us-gaap	Other Receivables OtherReceivables	3258000	USD
CY2018Q4	us-gaap	Other Receivables OtherReceivables	5041000	USD
CY2016	us-gaap	Participating Securities Distributed And Undistributed Earnings Loss Basic ParticipatingSecuritiesDistributedAndUndistributedEarningsLossBasic	1496000	USD
CY2017	us-gaap	Participating Securities Distributed And Undistributed Earnings Loss Basic ParticipatingSecuritiesDistributedAndUndistributedEarningsLossBasic	1517000	USD
CY2018	us-gaap	Participating Securities Distributed And Undistributed Earnings Loss Basic ParticipatingSecuritiesDistributedAndUndistributedEarningsLossBasic	1875000	USD
CY2016	us-gaap	Payments For Repurchase Of Common Stock PaymentsForRepurchaseOfCommonStock	144263000	USD
CY2017	us-gaap	Payments For Repurchase Of Common Stock PaymentsForRepurchaseOfCommonStock	0	USD
CY2018	us-gaap	Payments For Repurchase Of Common Stock PaymentsForRepurchaseOfCommonStock	0	USD
CY2016	us-gaap	Payments Of Dividends Common Stock PaymentsOfDividendsCommonStock	20599000	USD
CY2017	us-gaap	Payments Of Dividends Common Stock PaymentsOfDividendsCommonStock	65768000	USD
CY2018	us-gaap	Payments Of Dividends Common Stock PaymentsOfDividendsCommonStock	33408000	USD
CY2016	us-gaap	Payments To Acquire Marketable Securities PaymentsToAcquireMarketableSecurities	1049000	USD
CY2017	us-gaap	Payments To Acquire Marketable Securities PaymentsToAcquireMarketableSecurities	1752000	USD
CY2018	us-gaap	Payments To Acquire Marketable Securities PaymentsToAcquireMarketableSecurities	87887000	USD
CY2016	us-gaap	Payments To Acquire Property Plant And Equipment PaymentsToAcquirePropertyPlantAndEquipment	33994000	USD
CY2017	us-gaap	Payments To Acquire Property Plant And Equipment PaymentsToAcquirePropertyPlantAndEquipment	33337000	USD
CY2018	us-gaap	Payments To Acquire Property Plant And Equipment PaymentsToAcquirePropertyPlantAndEquipment	35328000	USD
CY2017Q4	us-gaap	Preferred Stock Par Or Stated Value Per Share PreferredStockParOrStatedValuePerShare	0.01
CY2018Q4	us-gaap	Preferred Stock Par Or Stated Value Per Share PreferredStockParOrStatedValuePerShare	0.01
CY2017Q4	us-gaap	Preferred Stock Shares Authorized PreferredStockSharesAuthorized	20000000	shares
CY2018Q4	us-gaap	Preferred Stock Shares Authorized PreferredStockSharesAuthorized	20000000	shares
CY2017Q4	us-gaap	Preferred Stock Shares Issued PreferredStockSharesIssued	0	shares
CY2018Q4	us-gaap	Preferred Stock Shares Issued PreferredStockSharesIssued	0	shares
CY2017Q4	us-gaap	Preferred Stock Shares Outstanding PreferredStockSharesOutstanding	0	shares
CY2018Q4	us-gaap	Preferred Stock Shares Outstanding PreferredStockSharesOutstanding	0	shares
CY2017Q4	us-gaap	Preferred Stock Value PreferredStockValue	0	USD
CY2018Q4	us-gaap	Preferred Stock Value PreferredStockValue	0	USD
CY2017Q4	us-gaap	Prepaid Insurance PrepaidInsurance	10782000	USD
CY2018Q4	us-gaap	Prepaid Insurance PrepaidInsurance	8411000	USD
CY2016	us-gaap	Proceeds From Payments For Other Financing Activities ProceedsFromPaymentsForOtherFinancingActivities	1373000	USD
CY2017	us-gaap	Proceeds From Payments For Other Financing Activities ProceedsFromPaymentsForOtherFinancingActivities	1554000	USD
CY2018	us-gaap	Proceeds From Payments For Other Financing Activities ProceedsFromPaymentsForOtherFinancingActivities	2257000	USD
CY2016	us-gaap	Proceeds From Repayments Of Debt ProceedsFromRepaymentsOfDebt	104400000	USD
CY2016	us-gaap	Proceeds From Sale And Maturity Of Marketable Securities ProceedsFromSaleAndMaturityOfMarketableSecurities	1715000	USD
CY2017	us-gaap	Proceeds From Sale And Maturity Of Marketable Securities ProceedsFromSaleAndMaturityOfMarketableSecurities	1561000	USD
CY2018	us-gaap	Proceeds From Sale And Maturity Of Marketable Securities ProceedsFromSaleAndMaturityOfMarketableSecurities	12625000	USD
CY2016	us-gaap	Proceeds From Sale Of Property Plant And Equipment ProceedsFromSaleOfPropertyPlantAndEquipment	43000	USD
CY2017	us-gaap	Proceeds From Sale Of Property Plant And Equipment ProceedsFromSaleOfPropertyPlantAndEquipment	278000	USD
CY2018	us-gaap	Proceeds From Sale Of Property Plant And Equipment ProceedsFromSaleOfPropertyPlantAndEquipment	151000	USD
CY2016	us-gaap	Proceeds From Secured Lines Of Credit ProceedsFromSecuredLinesOfCredit	124400000	USD
CY2017	us-gaap	Proceeds From Secured Lines Of Credit ProceedsFromSecuredLinesOfCredit	0	USD
CY2018	us-gaap	Proceeds From Secured Lines Of Credit ProceedsFromSecuredLinesOfCredit	40000000	USD
CY2016	us-gaap	Proceeds From Stock Options Exercised ProceedsFromStockOptionsExercised	598000	USD
CY2017	us-gaap	Proceeds From Stock Options Exercised ProceedsFromStockOptionsExercised	0	USD
CY2018	us-gaap	Proceeds From Stock Options Exercised ProceedsFromStockOptionsExercised	0	USD
CY2017Q4	us-gaap	Property Plant And Equipment Gross PropertyPlantAndEquipmentGross	310349000	USD
CY2018Q4	us-gaap	Property Plant And Equipment Gross PropertyPlantAndEquipmentGross	350808000	USD
CY2017Q4	us-gaap	Property Plant And Equipment Net PropertyPlantAndEquipmentNet	95659000	USD
CY2018Q4	us-gaap	Property Plant And Equipment Net PropertyPlantAndEquipmentNet	117213000	USD
CY2017Q4	us-gaap	Receivables Net Current ReceivablesNetCurrent	333981000	USD
CY2018Q4	us-gaap	Receivables Net Current ReceivablesNetCurrent	400623000	USD
CY2016	us-gaap	Repayments Of Lines Of Credit RepaymentsOfLinesOfCredit	20000000	USD
CY2017	us-gaap	Repayments Of Lines Of Credit RepaymentsOfLinesOfCredit	0	USD
CY2018	us-gaap	Repayments Of Lines Of Credit RepaymentsOfLinesOfCredit	0	USD
CY2017Q4	us-gaap	Restricted Cash And Cash Equivalents At Carrying Value RestrictedCashAndCashEquivalentsAtCarryingValue	41137000	USD
CY2018Q4	us-gaap	Restricted Cash And Cash Equivalents At Carrying Value RestrictedCashAndCashEquivalentsAtCarryingValue	42227000	USD
CY2017Q4	us-gaap	Retained Earnings Accumulated Deficit RetainedEarningsAccumulatedDeficit	296797000	USD
CY2018Q4	us-gaap	Retained Earnings Accumulated Deficit RetainedEarningsAccumulatedDeficit	397947000	USD
CY2016	us-gaap	Revenue From Contract With Customer Excluding Assessed Tax RevenueFromContractWithCustomerExcludingAssessedTax	2941347000	USD
CY2017Q1	us-gaap	Revenue From Contract With Customer Excluding Assessed Tax RevenueFromContractWithCustomerExcludingAssessedTax	882664000	USD
CY2017Q2	us-gaap	Revenue From Contract With Customer Excluding Assessed Tax RevenueFromContractWithCustomerExcludingAssessedTax	795552000	USD
CY2017Q3	us-gaap	Revenue From Contract With Customer Excluding Assessed Tax RevenueFromContractWithCustomerExcludingAssessedTax	795513000	USD
CY2017Q4	us-gaap	Revenue From Contract With Customer Excluding Assessed Tax RevenueFromContractWithCustomerExcludingAssessedTax	826494000	USD
CY2017	us-gaap	Revenue From Contract With Customer Excluding Assessed Tax RevenueFromContractWithCustomerExcludingAssessedTax	3300223000	USD
CY2018Q1	us-gaap	Revenue From Contract With Customer Excluding Assessed Tax RevenueFromContractWithCustomerExcludingAssessedTax	1014372000	USD
CY2018Q2	us-gaap	Revenue From Contract With Customer Excluding Assessed Tax RevenueFromContractWithCustomerExcludingAssessedTax	922295000	USD
CY2018Q3	us-gaap	Revenue From Contract With Customer Excluding Assessed Tax RevenueFromContractWithCustomerExcludingAssessedTax	925126000	USD
CY2016	us-gaap	Sales Commissions And Fees SalesCommissionsAndFees	19288000	USD
CY2017	us-gaap	Sales Commissions And Fees SalesCommissionsAndFees	22773000	USD
CY2018	us-gaap	Sales Commissions And Fees SalesCommissionsAndFees	28957000	USD
CY2016	us-gaap	Share Based Compensation ShareBasedCompensation	16643000	USD
CY2017	us-gaap	Share Based Compensation ShareBasedCompensation	24345000	USD
CY2018	us-gaap	Share Based Compensation ShareBasedCompensation	20425000	USD
CY2017	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Accelerated Compensation Cost ShareBasedCompensationArrangementByShareBasedPaymentAwardAcceleratedCompensationCost	2300000	USD
CY2018	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Award Vesting Period1 ShareBasedCompensationArrangementByShareBasedPaymentAwardAwardVestingPeriod1	P3Y
CY2018Q4	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Number Of Shares Available For Grant ShareBasedCompensationArrangementByShareBasedPaymentAwardNumberOfSharesAvailableForGrant	2680666	shares
CY2018Q4	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Options Exercisable Number ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsExercisableNumber	16000	shares
CY2018Q4	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Options Exercisable Weighted Average Exercise Price ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsExercisableWeightedAverageExercisePrice	15.30
CY2018	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Options Forfeitures And Expirations In Period ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsForfeituresAndExpirationsInPeriod	0	shares
CY2018	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Options Forfeitures And Expirations In Period Weighted Average Exercise Price ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsForfeituresAndExpirationsInPeriodWeightedAverageExercisePrice	0.00
CY2018	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Options Grants In Period ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsGrantsInPeriod	0	shares
CY2018Q4	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Options Outstanding Intrinsic Value ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingIntrinsicValue	1220000	USD
CY2017Q4	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Options Outstanding Number ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingNumber	16000	shares
CY2018Q4	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Options Outstanding Number ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingNumber	16000	shares
CY2017Q4	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Options Outstanding Weighted Average Exercise Price ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingWeightedAverageExercisePrice	15.30
CY2018Q4	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Options Outstanding Weighted Average Exercise Price ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingWeightedAverageExercisePrice	15.30
CY2018	us-gaap	Share Based Compensation Arrangements By Share Based Payment Award Options Exercises In Period Weighted Average Exercise Price ShareBasedCompensationArrangementsByShareBasedPaymentAwardOptionsExercisesInPeriodWeightedAverageExercisePrice	0.00
CY2018	us-gaap	Share Based Compensation Arrangements By Share Based Payment Award Options Grants In Period Weighted Average Exercise Price ShareBasedCompensationArrangementsByShareBasedPaymentAwardOptionsGrantsInPeriodWeightedAverageExercisePrice	0.00
CY2016Q1	us-gaap	Share Price SharePrice	23.75
CY2018Q4	us-gaap	Sharebased Compensation Arrangement By Sharebased Payment Award Options Exercisable Intrinsic Value1 SharebasedCompensationArrangementBySharebasedPaymentAwardOptionsExercisableIntrinsicValue1	1220000	USD
CY2018	us-gaap	Sharebased Compensation Arrangement By Sharebased Payment Award Options Outstanding Weighted Average Remaining Contractual Term2 SharebasedCompensationArrangementBySharebasedPaymentAwardOptionsOutstandingWeightedAverageRemainingContractualTerm2	P2Y6M
CY2018	us-gaap	Sharebased Compensation Shares Authorized Under Stock Option Plans Exercise Price Range Exercisable Options Weighted Average Remaining Contractual Term2 SharebasedCompensationSharesAuthorizedUnderStockOptionPlansExercisePriceRangeExercisableOptionsWeightedAverageRemainingContractualTerm2	P2Y6M
CY2017	us-gaap	Shares Paid For Tax Withholding For Share Based Compensation SharesPaidForTaxWithholdingForShareBasedCompensation	305828	shares
CY2018	us-gaap	Shares Paid For Tax Withholding For Share Based Compensation SharesPaidForTaxWithholdingForShareBasedCompensation	132021	shares
CY2017Q4	us-gaap	Short Term Investments ShortTermInvestments	24594000	USD
CY2018Q4	us-gaap	Short Term Investments ShortTermInvestments	77492000	USD
CY2016	us-gaap	Stock Issued During Period Shares Employee Stock Purchase Plans StockIssuedDuringPeriodSharesEmployeeStockPurchasePlans	34000	shares
CY2017	us-gaap	Stock Issued During Period Shares Employee Stock Purchase Plans StockIssuedDuringPeriodSharesEmployeeStockPurchasePlans	38000	shares
CY2018	us-gaap	Stock Issued During Period Shares Employee Stock Purchase Plans StockIssuedDuringPeriodSharesEmployeeStockPurchasePlans	30000	shares
CY2018	us-gaap	Stock Issued During Period Shares Stock Options Exercised StockIssuedDuringPeriodSharesStockOptionsExercised	0	shares
CY2016	us-gaap	Stock Issued During Period Value Stock Options Exercised StockIssuedDuringPeriodValueStockOptionsExercised	-598000	USD
CY2018Q4	us-gaap	Stock Repurchase Program Remaining Number Of Shares Authorized To Be Repurchased StockRepurchaseProgramRemainingNumberOfSharesAuthorizedToBeRepurchased	1611155	shares
CY2016Q1	us-gaap	Stock Repurchased And Retired During Period Shares StockRepurchasedAndRetiredDuringPeriodShares	6027062	shares
CY2016Q1	us-gaap	Stock Repurchased And Retired During Period Value StockRepurchasedAndRetiredDuringPeriodValue	143100000	USD
CY2016	us-gaap	Stock Repurchased And Retired During Period Value StockRepurchasedAndRetiredDuringPeriodValue	144263000	USD
CY2015Q4	us-gaap	Stockholders Equity StockholdersEquity	172455000	USD
CY2016Q4	us-gaap	Stockholders Equity StockholdersEquity	60525000	USD
CY2017Q4	us-gaap	Stockholders Equity StockholdersEquity	66321000	USD
CY2018Q4	us-gaap	Stockholders Equity StockholdersEquity	77676000	USD
CY2016	us-gaap	Stockholders Equity Other StockholdersEquityOther	-1372000	USD
CY2017	us-gaap	Stockholders Equity Other StockholdersEquityOther	-1554000	USD
CY2018	us-gaap	Stockholders Equity Other StockholdersEquityOther	-2256000	USD
CY2017Q4	us-gaap	Treasury Stock Shares TreasuryStockShares	14009000	shares
CY2018Q4	us-gaap	Treasury Stock Shares TreasuryStockShares	14555000	shares
CY2017	us-gaap	Treasury Stock Shares Acquired TreasuryStockSharesAcquired	594974	shares
CY2018	us-gaap	Treasury Stock Shares Acquired TreasuryStockSharesAcquired	1066409	shares
CY2017Q4	us-gaap	Treasury Stock Value TreasuryStockValue	256363000	USD
CY2018Q4	us-gaap	Treasury Stock Value TreasuryStockValue	357569000	USD
CY2016	us-gaap	Treasury Stock Value Acquired Cost Method TreasuryStockValueAcquiredCostMethod	31669000	USD
CY2017	us-gaap	Treasury Stock Value Acquired Cost Method TreasuryStockValueAcquiredCostMethod	38735000	USD
CY2018	us-gaap	Treasury Stock Value Acquired Cost Method TreasuryStockValueAcquiredCostMethod	113327000	USD
CY2017Q4	us-gaap	Us Government Securities At Carrying Value USGovernmentSecuritiesAtCarryingValue	0	USD
CY2018Q4	us-gaap	Us Government Securities At Carrying Value USGovernmentSecuritiesAtCarryingValue	50147000	USD
CY2017Q4	us-gaap	Unbilled Contracts Receivable UnbilledContractsReceivable	74632000	USD
CY2018Q4	us-gaap	Unbilled Contracts Receivable UnbilledContractsReceivable	89765000	USD
CY2018Q4	us-gaap	Unrecorded Unconditional Purchase Obligation Balance On Fifth Anniversary UnrecordedUnconditionalPurchaseObligationBalanceOnFifthAnniversary	1954000	USD
CY2018Q4	us-gaap	Unrecorded Unconditional Purchase Obligation Balance On First Anniversary UnrecordedUnconditionalPurchaseObligationBalanceOnFirstAnniversary	16535000	USD
CY2018Q4	us-gaap	Unrecorded Unconditional Purchase Obligation Balance On Fourth Anniversary UnrecordedUnconditionalPurchaseObligationBalanceOnFourthAnniversary	6525000	USD
CY2018Q4	us-gaap	Unrecorded Unconditional Purchase Obligation Balance On Second Anniversary UnrecordedUnconditionalPurchaseObligationBalanceOnSecondAnniversary	16782000	USD
CY2018Q4	us-gaap	Unrecorded Unconditional Purchase Obligation Balance On Third Anniversary UnrecordedUnconditionalPurchaseObligationBalanceOnThirdAnniversary	12494000	USD
CY2018Q4	us-gaap	Unrecorded Unconditional Purchase Obligation Balance Sheet Amount UnrecordedUnconditionalPurchaseObligationBalanceSheetAmount	54990000	USD
CY2018Q4	us-gaap	Unrecorded Unconditional Purchase Obligation Due After Five Years UnrecordedUnconditionalPurchaseObligationDueAfterFiveYears	700000	USD
CY2016	us-gaap	Weighted Average Number Of Shares Outstanding Basic WeightedAverageNumberOfSharesOutstandingBasic	41668000	shares
CY2017	us-gaap	Weighted Average Number Of Shares Outstanding Basic WeightedAverageNumberOfSharesOutstandingBasic	41067000	shares
CY2018	us-gaap	Weighted Average Number Of Shares Outstanding Basic WeightedAverageNumberOfSharesOutstandingBasic	41217000	shares
CY2017Q4	us-gaap	Workers Compensation Liability Current WorkersCompensationLiabilityCurrent	42974000	USD
CY2018Q4	us-gaap	Workers Compensation Liability Current WorkersCompensationLiabilityCurrent	45818000	USD
CY2016Q4	us-gaap	Workers Compensation Liability Current And Noncurrent WorkersCompensationLiabilityCurrentAndNoncurrent	183928000	USD
CY2017Q4	us-gaap	Workers Compensation Liability Current And Noncurrent WorkersCompensationLiabilityCurrentAndNoncurrent	207630000	USD
CY2018Q4	us-gaap	Workers Compensation Liability Current And Noncurrent WorkersCompensationLiabilityCurrentAndNoncurrent	229639000	USD
CY2017Q4	us-gaap	Workers Compensation Liability Noncurrent WorkersCompensationLiabilityNoncurrent	166493000	USD
CY2018Q4	us-gaap	Workers Compensation Liability Noncurrent WorkersCompensationLiabilityNoncurrent	187412000	USD
CY2018	us-gaap	Description Of New Accounting Pronouncements Not Yet Adopted DescriptionOfNewAccountingPronouncementsNotYetAdopted	<div style="font-family:Times New Roman;font-size:10pt;"><div style="line-height:120%;padding-bottom:13px;padding-top:13px;text-align:justify;font-size:10pt;"><font style="font-family:Arial;font-size:10pt;color:#4c8c2b;font-style:italic;font-weight:bold;text-decoration:none;">New Accounting Pronouncements</font></div><div style="line-height:120%;padding-bottom:13px;padding-top:0px;text-align:left;text-indent:0px;font-size:10pt;"><font style="font-family:Arial;font-size:10pt;">In February 2016, the FASB issued ASU No. 2016-02, </font><font style="font-family:Arial;font-size:10pt;font-style:italic;">Leases</font><font style="font-family:Arial;font-size:10pt;">. The new standard requires recognition of lease assets and lease liabilities for leases previously classified as operating leases. The guidance is effective for fiscal years beginning after December 15, 2018. While our technical analysis is ongoing, we do not expect the new standard to have a material impact to our Consolidated Statements of Operations. We expect the lease commitments discussed in </font><font style="font-family:Arial;font-size:10pt;">Note 11</font><font style="font-family:Arial;font-size:10pt;">, “</font><font style="font-family:Arial;font-size:10pt;">Leases</font><font style="font-family:Arial;font-size:10pt;">” to appear on our Consolidated Balance Sheets in the form of a lease asset and a lease liability. Such amounts are based on the present value of such commitments using our incremental borrowing rate. We plan to utilize the transition package of practical expedients permitted within the new standard, which among other things, allows us to carryforward the historical lease classification. We do not plan to elect the practical expedient to use hindsight in determining the lease term and in assessing impairment of right-of-use assets.</font></div></div>
CY2018	us-gaap	Prior Period Reclassification Adjustment Description PriorPeriodReclassificationAdjustmentDescription	<div style="font-family:Times New Roman;font-size:10pt;"><div style="line-height:120%;padding-bottom:13px;padding-top:13px;text-align:justify;font-size:10pt;"><font style="font-family:Arial;font-size:10pt;color:#4c8c2b;font-style:italic;font-weight:bold;text-decoration:none;">Reclassifications</font></div><div style="line-height:120%;padding-bottom:13px;padding-top:0px;text-align:left;text-indent:0px;font-size:10pt;"><font style="font-family:Arial;font-size:10pt;">Certain prior year amounts have been reclassified to conform to the </font><font style="font-family:Arial;font-size:10pt;color:#000000;text-decoration:none;">2018</font><font style="font-family:Arial;font-size:10pt;"> presentation.</font></div></div>
CY2018	us-gaap	Use Of Estimates UseOfEstimates	<div style="font-family:Times New Roman;font-size:10pt;"><div style="line-height:120%;padding-bottom:13px;padding-top:13px;text-align:justify;font-size:10pt;"><font style="font-family:Arial;font-size:10pt;color:#4c8c2b;font-style:italic;font-weight:bold;text-decoration:none;">Use of Estimates</font></div><div style="line-height:120%;padding-bottom:13px;padding-top:0px;text-align:left;text-indent:0px;font-size:10pt;"><font style="font-family:Arial;font-size:10pt;">The preparation of financial statements in conformity with United States Generally Accepted Accounting Principles 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.</font></div></div>

Files In Submission

Name	View Source	Status
0001000753-19-000007-index-headers.html	Edgar Link	pending
0001000753-19-000007-index.html	Edgar Link	pending
0001000753-19-000007.txt	Edgar Link	pending
0001000753-19-000007-xbrl.zip	Edgar Link	pending
a12312018-documentx10k.htm	Edgar Link	pending
a12312018nsp-ex211xsubsidi.htm	Edgar Link	pending
a12312018nsp-ex231xconsent.htm	Edgar Link	pending
a12312018nsp-ex241xpoas.htm	Edgar Link	pending
a12312018nsp-ex311.htm	Edgar Link	pending
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a12312018nsp-ex321.htm	Edgar Link	pending
a12312018nsp-ex322.htm	Edgar Link	pending
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chart-ffd02b9f44d96744953.jpg	Edgar Link	pending
FilingSummary.xml	Edgar Link	unprocessable
Financial_Report.xlsx	Edgar Link	pending
insperitylogoa02.jpg	Edgar Link	pending
nsp-20181231.xml	Edgar Link	completed
nsp-20181231.xsd	Edgar Link	pending
nsp-20181231_cal.xml	Edgar Link	unprocessable
nsp-20181231_def.xml	Edgar Link	unprocessable
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nsp-20181231_pre.xml	Edgar Link	unprocessable
nspgraph1a04.jpg	Edgar Link	pending
nspgraph2.jpg	Edgar Link	pending
R1.htm	Edgar Link	pending
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report.css	Edgar Link	pending
Show.js	Edgar Link	pending

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$NSP
INSPERITY, INC. Stock $nsp

2018 Q4 Form 10-K Financial Statement

#000100075319000007 Filed on February 11, 2019

Income Statement

Balance Sheet

Cashflow Statement

Facts In Submission

Files In Submission

$NSP INSPERITY, INC. Stock $nsp

2018 Q4 Form 10-K Financial Statement

#000100075319000007 Filed on February 11, 2019

Income Statement

Balance Sheet

Cashflow Statement

Facts In Submission

Files In Submission

$NSP
INSPERITY, INC. Stock $nsp