$NSP
INSPERITY, INC. Stock $nsp

$nsp Overview Financials Valuation SEC Filings Company Website

2013 Q4 Form 10-K Financial Statement

#000100075314000008 Filed on February 10, 2014

Income Statement

Concept	2013 Q4	2013	2012 Q4
Revenue	$557.1M	$2.256B	$532.4M
YoY Change	4.64%	4.51%	7.54%
Cost Of Revenue	$467.2M	$1.863B	$438.9M
YoY Change	6.45%	4.86%	8.32%
Gross Profit	$89.98M	$393.3M	$93.50M
YoY Change	-3.77%	2.89%	3.95%
Gross Profit Margin	16.15%	17.43%	17.56%
Selling, General & Admin	$74.40M	$312.6M	$68.50M
YoY Change	8.61%	6.94%	-1.3%
% of Gross Profit	82.69%	79.49%	73.26%
Research & Development
YoY Change
% of Gross Profit
Depreciation & Amortization	$5.300M	$21.06M	$4.900M
YoY Change	8.16%	15.42%	25.64%
% of Gross Profit	5.89%	5.36%	5.24%
Operating Expenses	$79.80M	$337.0M	$73.40M
YoY Change	8.72%	7.09%	0.27%
Operating Profit	$6.874M	$56.22M	$15.89M
YoY Change	-56.75%	-16.7%	-5.09%
Interest Expense	$0.00	$158.0K	$200.0K
YoY Change	-100.0%	-74.06%	100.0%
% of Operating Profit	0.0%	0.28%	1.26%
Other Income/Expense, Net		-$2.649M
YoY Change		-1516.58%
Pretax Income	$6.900M	$53.73M	$16.10M
YoY Change	-57.14%	-21.32%	-4.17%
Income Tax	$1.600M	$21.70M	$6.600M
% Of Pretax Income	23.19%	40.39%	40.99%
Net Earnings	$5.289M	$32.03M	$9.445M
YoY Change	-44.0%	-20.72%	-12.55%
Net Earnings / Revenue	0.95%	1.42%	1.77%
Basic Earnings Per Share	$0.21	$1.25	$0.34
Diluted Earnings Per Share	$0.21	$1.25	$0.34
COMMON SHARES
Basic Shares Outstanding	25.57M shares	24.85M shares
Diluted Shares Outstanding

Balance Sheet

Concept	2013 Q4	2013	2012 Q4
SHORT-TERM ASSETS
Cash & Short-Term Investments	$272.1M	$272.1M	$281.4M
YoY Change	-3.3%	-3.3%	4.92%
Cash & Equivalents	$225.8M	$225.8M	$264.5M
Short-Term Investments	$46.30M	$46.30M	$16.90M
Other Short-Term Assets	$12.05M	$82.80M	$9.651M
YoY Change	24.89%	4.02%	-88.06%
Inventory
Prepaid Expenses
Receivables	$7.453M	$57.70M	$6.931M
Other Receivables	$3.300M	$152.7M	$2.400M
Total Short-Term Assets	$565.3M	$565.3M	$551.5M
YoY Change	2.51%	2.5%	5.48%
LONG-TERM ASSETS
Property, Plant & Equipment	$86.42M	$86.40M	$93.94M
YoY Change	-8.01%	-7.99%	1.12%
Goodwill	$14.44M		$17.21M
YoY Change	-16.09%
Intangibles
YoY Change
Long-Term Investments
YoY Change
Other Assets	$1.816M	$96.40M	$4.817M
YoY Change	-62.3%	19.01%	-92.93%
Total Long-Term Assets	$201.2M	$201.3M	$198.7M
YoY Change	1.26%	1.31%	4.87%
TOTAL ASSETS
Total Short-Term Assets	$565.3M	$565.3M	$551.5M
Total Long-Term Assets	$201.2M	$201.3M	$198.7M
Total Assets	$766.6M	$766.6M	$750.2M
YoY Change	2.18%	2.19%	5.32%
SHORT-TERM LIABILITIES
YoY Change
Accounts Payable	$2.678M	$2.700M	$3.660M
YoY Change	-26.83%	-27.03%	-28.24%
Accrued Expenses	$14.96M	$434.0M	$12.48M
YoY Change	19.89%	1.4%	-96.81%
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	$436.7M	$436.7M	$435.8M
YoY Change	0.21%	0.21%	9.98%
LONG-TERM LIABILITIES
Long-Term Debt	$0.00	$0.00	$0.00
YoY Change
Other Long-Term Liabilities	$68.90M	$68.90M	$64.50M
YoY Change	6.82%	6.82%	7.32%
Total Long-Term Liabilities	$76.60M	$68.90M	$73.54M
YoY Change	4.17%	6.82%	22.36%
TOTAL LIABILITIES
Total Short-Term Liabilities	$436.7M	$436.7M	$435.8M
Total Long-Term Liabilities	$76.60M	$68.90M	$73.54M
Total Liabilities	$513.3M	$513.3M	$509.3M
YoY Change	0.78%	0.79%	9.03%
SHAREHOLDERS EQUITY
Retained Earnings	$256.0M		$241.3M
YoY Change	6.07%
Common Stock	$136.0M		$133.5M
YoY Change	1.83%
Preferred Stock
YoY Change
Treasury Stock (at cost)	$138.7M		$134.0M
YoY Change	3.54%
Treasury Stock Shares	5.175M shares		5.096M shares
Shareholders Equity	$253.3M	$253.3M	$240.9M
YoY Change
Total Liabilities & Shareholders Equity	$766.6M	$766.6M	$750.2M
YoY Change	2.18%	2.19%	5.32%

Cashflow Statement

Concept	2013 Q4	2013	2012 Q4
OPERATING ACTIVITIES
Net Income	$5.289M	$32.03M	$9.445M
YoY Change	-44.0%	-20.72%	-12.55%
Depreciation, Depletion And Amortization	$5.300M	$21.06M	$4.900M
YoY Change	8.16%	15.42%	25.64%
Cash From Operating Activities	$69.10M	$34.66M	$65.80M
YoY Change	5.02%	-61.82%	8.4%
INVESTING ACTIVITIES
Capital Expenditures	-$2.300M	$11.56M	-$5.600M
YoY Change	-58.93%	-34.42%	-30.0%
Acquisitions
YoY Change
Other Investing Activities	$600.0K	-$31.50M	$33.20M
YoY Change	-98.19%	-188.73%	-997.3%
Cash From Investing Activities	-$1.600M	-$43.03M	$27.60M
YoY Change	-105.8%	-340.98%	-335.9%
FINANCING ACTIVITIES
Cash Dividend Paid
YoY Change
Common Stock Issuance & Retirement, Net		$0.00
YoY Change		-100.0%
Debt Paid & Issued, Net
YoY Change
Cash From Financing Activities	-3.400M	-$30.42M	-30.90M
YoY Change	-89.0%	-45.01%	301.3%
NET CHANGE
Cash From Operating Activities	69.10M	$34.66M	65.80M
Cash From Investing Activities	-1.600M	-$43.03M	27.60M
Cash From Financing Activities	-3.400M	-$30.42M	-30.90M
Net Change In Cash	64.10M	-$38.79M	62.50M
YoY Change	2.56%	-172.73%	51.33%
FREE CASH FLOW
Cash From Operating Activities	$69.10M	$34.66M	$65.80M
Capital Expenditures	-$2.300M	$11.56M	-$5.600M
Free Cash Flow	$71.40M	$23.10M	$71.40M
YoY Change	0.0%	-68.43%	3.93%

Facts In Submission

Frame	Concept Type	Concept / XBRL Key	Value	Unit
CY2013Q4	us-gaap	Accounts Payable Current AccountsPayableCurrent	2678000	USD
CY2012Q4	us-gaap	Accounts Payable Current AccountsPayableCurrent	3660000	USD
CY2013Q4	us-gaap	Accounts Receivable Net Current AccountsReceivableNetCurrent	7453000	USD
CY2012Q4	us-gaap	Accounts Receivable Net Current AccountsReceivableNetCurrent	6931000	USD
CY2013Q4	us-gaap	Accrued Liabilities Current AccruedLiabilitiesCurrent	14960000	USD
CY2012Q4	us-gaap	Accrued Liabilities Current AccruedLiabilitiesCurrent	12478000	USD
CY2013Q4	us-gaap	Accumulated Depreciation Depletion And Amortization Property Plant And Equipment AccumulatedDepreciationDepletionAndAmortizationPropertyPlantAndEquipment	181760000	USD
CY2012Q4	us-gaap	Accumulated Depreciation Depletion And Amortization Property Plant And Equipment AccumulatedDepreciationDepletionAndAmortizationPropertyPlantAndEquipment	168358000	USD
CY2013Q4	us-gaap	Accumulated Other Comprehensive Income Loss Net Of Tax AccumulatedOtherComprehensiveIncomeLossNetOfTax	29000	USD
CY2012Q4	us-gaap	Accumulated Other Comprehensive Income Loss Net Of Tax AccumulatedOtherComprehensiveIncomeLossNetOfTax	16000	USD
CY2013Q4	us-gaap	Additional Paid In Capital Common Stock AdditionalPaidInCapitalCommonStock	135653000	USD
CY2012Q4	us-gaap	Additional Paid In Capital Common Stock AdditionalPaidInCapitalCommonStock	133207000	USD
CY2012	us-gaap	Adjustments To Additional Paid In Capital Sharebased Compensation Requisite Service Period Recognition Value AdjustmentsToAdditionalPaidInCapitalSharebasedCompensationRequisiteServicePeriodRecognitionValue	9814000	USD
CY2011	us-gaap	Adjustments To Additional Paid In Capital Sharebased Compensation Requisite Service Period Recognition Value AdjustmentsToAdditionalPaidInCapitalSharebasedCompensationRequisiteServicePeriodRecognitionValue	8601000	USD
CY2013	us-gaap	Adjustments To Additional Paid In Capital Sharebased Compensation Requisite Service Period Recognition Value AdjustmentsToAdditionalPaidInCapitalSharebasedCompensationRequisiteServicePeriodRecognitionValue	11103000	USD
CY2011	us-gaap	Adjustments To Additional Paid In Capital Tax Effect From Share Based Compensation AdjustmentsToAdditionalPaidInCapitalTaxEffectFromShareBasedCompensation	1663000	USD
CY2012	us-gaap	Adjustments To Additional Paid In Capital Tax Effect From Share Based Compensation AdjustmentsToAdditionalPaidInCapitalTaxEffectFromShareBasedCompensation	1751000	USD
CY2013	us-gaap	Adjustments To Additional Paid In Capital Tax Effect From Share Based Compensation AdjustmentsToAdditionalPaidInCapitalTaxEffectFromShareBasedCompensation	1259000	USD
CY2012	us-gaap	Adjustments To Reconcile Net Income Loss To Cash Provided By Used In Operating Activities AdjustmentsToReconcileNetIncomeLossToCashProvidedByUsedInOperatingActivities	50396000	USD
CY2011	us-gaap	Adjustments To Reconcile Net Income Loss To Cash Provided By Used In Operating Activities AdjustmentsToReconcileNetIncomeLossToCashProvidedByUsedInOperatingActivities	43441000	USD
CY2013	us-gaap	Adjustments To Reconcile Net Income Loss To Cash Provided By Used In Operating Activities AdjustmentsToReconcileNetIncomeLossToCashProvidedByUsedInOperatingActivities	2632000	USD
CY2013	us-gaap	Advertising Expense AdvertisingExpense	23795000	USD
CY2011	us-gaap	Advertising Expense AdvertisingExpense	26613000	USD
CY2012	us-gaap	Advertising Expense AdvertisingExpense	21586000	USD
CY2011	us-gaap	Allocated Share Based Compensation Expense AllocatedShareBasedCompensationExpense	8601000	USD
CY2012	us-gaap	Allocated Share Based Compensation Expense AllocatedShareBasedCompensationExpense	9814000	USD
CY2013	us-gaap	Allocated Share Based Compensation Expense AllocatedShareBasedCompensationExpense	11103000	USD
CY2012Q4	us-gaap	Allowance For Doubtful Accounts Receivable Current AllowanceForDoubtfulAccountsReceivableCurrent	1000000	USD
CY2013Q4	us-gaap	Allowance For Doubtful Accounts Receivable Current AllowanceForDoubtfulAccountsReceivableCurrent	900000	USD
CY2013	us-gaap	Amortization Of Intangible Assets AmortizationOfIntangibleAssets	2000000	USD
CY2011	us-gaap	Amortization Of Intangible Assets AmortizationOfIntangibleAssets	1700000	USD
CY2012	us-gaap	Amortization Of Intangible Assets AmortizationOfIntangibleAssets	1800000	USD
CY2011	us-gaap	Antidilutive Securities Excluded From Computation Of Earnings Per Share Amount AntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareAmount	29000	shares
CY2013	us-gaap	Antidilutive Securities Excluded From Computation Of Earnings Per Share Amount AntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareAmount	8000	shares
CY2012	us-gaap	Antidilutive Securities Excluded From Computation Of Earnings Per Share Amount AntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareAmount	29000	shares
CY2013Q4	us-gaap	Assets Assets	766560000	USD
CY2012Q4	us-gaap	Assets Assets	750200000	USD
CY2013Q4	us-gaap	Assets Current AssetsCurrent	565317000	USD
CY2012Q4	us-gaap	Assets Current AssetsCurrent	551465000	USD
CY2013Q4	us-gaap	Available For Sale Debt Securities Amortized Cost Basis AvailableForSaleDebtSecuritiesAmortizedCostBasis	46290000	USD
CY2012Q4	us-gaap	Available For Sale Debt Securities Amortized Cost Basis AvailableForSaleDebtSecuritiesAmortizedCostBasis	16878000	USD
CY2013Q4	us-gaap	Available For Sale Securities Debt Maturities After One Through Five Years Amortized Cost AvailableForSaleSecuritiesDebtMaturitiesAfterOneThroughFiveYearsAmortizedCost	17213000	USD
CY2013Q4	us-gaap	Available For Sale Securities Debt Maturities After One Through Five Years Fair Value AvailableForSaleSecuritiesDebtMaturitiesAfterOneThroughFiveYearsFairValue	17242000	USD
CY2013Q4	us-gaap	Available For Sale Securities Debt Maturities Amortized Cost AvailableForSaleSecuritiesDebtMaturitiesAmortizedCost	46290000	USD
CY2013Q4	us-gaap	Available For Sale Securities Debt Maturities Within One Year Amortized Cost AvailableForSaleSecuritiesDebtMaturitiesWithinOneYearAmortizedCost	29077000	USD
CY2013Q4	us-gaap	Available For Sale Securities Debt Maturities Within One Year Fair Value AvailableForSaleSecuritiesDebtMaturitiesWithinOneYearFairValue	29098000	USD
CY2012Q4	us-gaap	Available For Sale Securities Fair Value Disclosure AvailableForSaleSecuritiesFairValueDisclosure	16904000	USD
CY2013Q4	us-gaap	Available For Sale Securities Fair Value Disclosure AvailableForSaleSecuritiesFairValueDisclosure	46340000	USD
CY2011	us-gaap	Available For Sale Securities Gross Realized Gain Loss Net AvailableForSaleSecuritiesGrossRealizedGainLossNet	0	USD
CY2013	us-gaap	Available For Sale Securities Gross Realized Gain Loss Net AvailableForSaleSecuritiesGrossRealizedGainLossNet	3000	USD
CY2012	us-gaap	Available For Sale Securities Gross Realized Gain Loss Net AvailableForSaleSecuritiesGrossRealizedGainLossNet	58000	USD
CY2013Q4	us-gaap	Available For Sale Securities Gross Unrealized Losses1 AvailableForSaleSecuritiesGrossUnrealizedLosses1	1000	USD
CY2012Q4	us-gaap	Available For Sale Securities Gross Unrealized Losses1 AvailableForSaleSecuritiesGrossUnrealizedLosses1	3000	USD
CY2013Q4	us-gaap	Availableforsale Securities Gross Unrealized Gain AvailableforsaleSecuritiesGrossUnrealizedGain	51000	USD
CY2012Q4	us-gaap	Availableforsale Securities Gross Unrealized Gain AvailableforsaleSecuritiesGrossUnrealizedGain	29000	USD
CY2013Q4	us-gaap	Buildings And Improvements Gross BuildingsAndImprovementsGross	67939000	USD
CY2012Q4	us-gaap	Buildings And Improvements Gross BuildingsAndImprovementsGross	68583000	USD
CY2013	us-gaap	Capitalized Computer Software Amortization CapitalizedComputerSoftwareAmortization	3600000	USD
CY2012	us-gaap	Capitalized Computer Software Amortization CapitalizedComputerSoftwareAmortization	2800000	USD
CY2011	us-gaap	Capitalized Computer Software Amortization CapitalizedComputerSoftwareAmortization	1600000	USD
CY2012Q4	us-gaap	Capitalized Computer Software Net CapitalizedComputerSoftwareNet	8200000	USD
CY2013Q4	us-gaap	Capitalized Computer Software Net CapitalizedComputerSoftwareNet	7200000	USD
CY2012Q4	us-gaap	Cash And Cash Equivalents At Carrying Value CashAndCashEquivalentsAtCarryingValue	264544000	USD
CY2013Q4	us-gaap	Cash And Cash Equivalents At Carrying Value CashAndCashEquivalentsAtCarryingValue	225755000	USD
CY2010Q4	us-gaap	Cash And Cash Equivalents At Carrying Value CashAndCashEquivalentsAtCarryingValue	234829000	USD
CY2011Q4	us-gaap	Cash And Cash Equivalents At Carrying Value CashAndCashEquivalentsAtCarryingValue	211208000	USD
CY2012Q3	us-gaap	Common Stock Dividends Per Share Declared CommonStockDividendsPerShareDeclared	0.17
CY2012Q4	us-gaap	Common Stock Dividends Per Share Declared CommonStockDividendsPerShareDeclared	1.17
CY2012Q2	us-gaap	Common Stock Dividends Per Share Declared CommonStockDividendsPerShareDeclared	0.17
CY2013Q1	us-gaap	Common Stock Dividends Per Share Declared CommonStockDividendsPerShareDeclared	0.17
CY2012Q1	us-gaap	Common Stock Dividends Per Share Declared CommonStockDividendsPerShareDeclared	0.15
CY2013Q4	us-gaap	Common Stock Dividends Per Share Declared CommonStockDividendsPerShareDeclared	0.17
CY2013Q2	us-gaap	Common Stock Dividends Per Share Declared CommonStockDividendsPerShareDeclared	0.17
CY2012Q4	us-gaap	Common Stock Par Or Stated Value Per Share CommonStockParOrStatedValuePerShare	0.01
CY2013Q4	us-gaap	Common Stock Par Or Stated Value Per Share CommonStockParOrStatedValuePerShare	0.01
CY2012	us-gaap	Cash And Cash Equivalents Period Increase Decrease CashAndCashEquivalentsPeriodIncreaseDecrease	53336000	USD
CY2013	us-gaap	Cash And Cash Equivalents Period Increase Decrease CashAndCashEquivalentsPeriodIncreaseDecrease	-38789000	USD
CY2011	us-gaap	Cash And Cash Equivalents Period Increase Decrease CashAndCashEquivalentsPeriodIncreaseDecrease	-23621000	USD
CY2013Q4	us-gaap	Commitments And Contingencies CommitmentsAndContingencies		USD
CY2012Q4	us-gaap	Commitments And Contingencies CommitmentsAndContingencies		USD
CY2013Q3	us-gaap	Common Stock Dividends Per Share Declared CommonStockDividendsPerShareDeclared	0.17
CY2013Q4	us-gaap	Common Stock Shares Authorized CommonStockSharesAuthorized	60000000	shares
CY2012Q4	us-gaap	Common Stock Shares Authorized CommonStockSharesAuthorized	60000000	shares
CY2012Q4	us-gaap	Common Stock Shares Issued CommonStockSharesIssued	30758000	shares
CY2013Q4	us-gaap	Common Stock Shares Issued CommonStockSharesIssued	30758000	shares
CY2012Q4	us-gaap	Common Stock Value CommonStockValue	308000	USD
CY2013Q4	us-gaap	Common Stock Value CommonStockValue	308000	USD
CY2012	us-gaap	Comprehensive Income Net Of Tax Including Portion Attributable To Noncontrolling Interest ComprehensiveIncomeNetOfTaxIncludingPortionAttributableToNoncontrollingInterest	40394000	USD
CY2011	us-gaap	Comprehensive Income Net Of Tax Including Portion Attributable To Noncontrolling Interest ComprehensiveIncomeNetOfTaxIncludingPortionAttributableToNoncontrollingInterest	30473000	USD
CY2013	us-gaap	Comprehensive Income Net Of Tax Including Portion Attributable To Noncontrolling Interest ComprehensiveIncomeNetOfTaxIncludingPortionAttributableToNoncontrollingInterest	32045000	USD
CY2011	us-gaap	Deferred Income Tax Expense Benefit DeferredIncomeTaxExpenseBenefit	-46000	USD
CY2011	us-gaap	Current State And Local Tax Expense Benefit CurrentStateAndLocalTaxExpenseBenefit	3535000	USD
CY2012Q4	us-gaap	Customer Advances Current CustomerAdvancesCurrent	13513000	USD
CY2013Q4	us-gaap	Customer Advances Current CustomerAdvancesCurrent	24459000	USD
CY2013	us-gaap	Deferred Federal Income Tax Expense Benefit DeferredFederalIncomeTaxExpenseBenefit	-2258000	USD
CY2012	us-gaap	Deferred Federal Income Tax Expense Benefit DeferredFederalIncomeTaxExpenseBenefit	-5363000	USD
CY2012	us-gaap	Deferred State And Local Income Tax Expense Benefit DeferredStateAndLocalIncomeTaxExpenseBenefit	-380000	USD
CY2013	us-gaap	Deferred State And Local Income Tax Expense Benefit DeferredStateAndLocalIncomeTaxExpenseBenefit	-30000	USD
CY2011	us-gaap	Deferred State And Local Income Tax Expense Benefit DeferredStateAndLocalIncomeTaxExpenseBenefit	-93000	USD
CY2011	us-gaap	Deferred Federal Income Tax Expense Benefit DeferredFederalIncomeTaxExpenseBenefit	47000	USD
CY2013	us-gaap	Deferred Income Tax Expense Benefit DeferredIncomeTaxExpenseBenefit	-2288000	USD
CY2012	us-gaap	Deferred Income Tax Expense Benefit DeferredIncomeTaxExpenseBenefit	-5743000	USD
CY2011Q4	us-gaap	Cost Method Investments CostMethodInvestments	2800000	USD
CY2013Q2	us-gaap	Costmethod Investments Other Than Temporary Impairment CostmethodInvestmentsOtherThanTemporaryImpairment	2700000	USD
CY2011	us-gaap	Current Federal Tax Expense Benefit CurrentFederalTaxExpenseBenefit	16816000	USD
CY2012	us-gaap	Current Federal Tax Expense Benefit CurrentFederalTaxExpenseBenefit	29280000	USD
CY2013	us-gaap	Current Federal Tax Expense Benefit CurrentFederalTaxExpenseBenefit	20476000	USD
CY2011	us-gaap	Current Income Tax Expense Benefit CurrentIncomeTaxExpenseBenefit	20351000	USD
CY2012	us-gaap	Current Income Tax Expense Benefit CurrentIncomeTaxExpenseBenefit	33631000	USD
CY2013	us-gaap	Current Income Tax Expense Benefit CurrentIncomeTaxExpenseBenefit	23988000	USD
CY2013	us-gaap	Current State And Local Tax Expense Benefit CurrentStateAndLocalTaxExpenseBenefit	3512000	USD
CY2012	us-gaap	Current State And Local Tax Expense Benefit CurrentStateAndLocalTaxExpenseBenefit	4351000	USD
CY2013Q4	us-gaap	Deferred Tax Assets Goodwill And Intangible Assets DeferredTaxAssetsGoodwillAndIntangibleAssets	837000	USD
CY2012Q4	us-gaap	Deferred Tax Assets Goodwill And Intangible Assets DeferredTaxAssetsGoodwillAndIntangibleAssets	227000	USD
CY2013Q4	us-gaap	Deferred Tax Assets Gross DeferredTaxAssetsGross	18240000	USD
CY2012Q4	us-gaap	Deferred Tax Assets Gross DeferredTaxAssetsGross	16824000	USD
CY2012Q4	us-gaap	Deferred Tax Assets Investments DeferredTaxAssetsInvestments	0	USD
CY2013Q4	us-gaap	Deferred Tax Assets Investments DeferredTaxAssetsInvestments	991000	USD
CY2012Q4	us-gaap	Deferred Tax Assets Liabilities Net DeferredTaxAssetsLiabilitiesNet	-1789000	USD
CY2013Q4	us-gaap	Deferred Tax Assets Liabilities Net DeferredTaxAssetsLiabilitiesNet	489000	USD
CY2012Q4	us-gaap	Deferred Tax Assets Liabilities Net Current DeferredTaxAssetsLiabilitiesNetCurrent	7211000	USD
CY2013Q4	us-gaap	Deferred Tax Assets Liabilities Net Current DeferredTaxAssetsLiabilitiesNetCurrent	8185000	USD
CY2013Q4	us-gaap	Deferred Tax Assets Liabilities Net Noncurrent DeferredTaxAssetsLiabilitiesNetNoncurrent	-7696000	USD
CY2012Q4	us-gaap	Deferred Tax Assets Liabilities Net Noncurrent DeferredTaxAssetsLiabilitiesNetNoncurrent	-9000000	USD
CY2013Q4	us-gaap	Deferred Tax Liabilities Property Plant And Equipment DeferredTaxLiabilitiesPropertyPlantAndEquipment	8937000	USD
CY2012Q4	us-gaap	Deferred Tax Liabilities Property Plant And Equipment DeferredTaxLiabilitiesPropertyPlantAndEquipment	8580000	USD
CY2012	us-gaap	Depreciation And Amortization DepreciationAndAmortization	18250000	USD
CY2011	us-gaap	Depreciation And Amortization DepreciationAndAmortization	15218000	USD
CY2013	us-gaap	Depreciation And Amortization DepreciationAndAmortization	21064000	USD
CY2013	us-gaap	Depreciation Depletion And Amortization DepreciationDepletionAndAmortization	21033000	USD
CY2012	us-gaap	Depreciation Depletion And Amortization DepreciationDepletionAndAmortization	18183000	USD
CY2013Q4	us-gaap	Deferred Tax Assets Net DeferredTaxAssetsNet	17249000	USD
CY2012Q4	us-gaap	Deferred Tax Assets Net DeferredTaxAssetsNet	16824000	USD
CY2013Q4	us-gaap	Deferred Tax Assets Operating Loss Carryforwards DeferredTaxAssetsOperatingLossCarryforwards	1773000	USD
CY2012Q4	us-gaap	Deferred Tax Assets Operating Loss Carryforwards DeferredTaxAssetsOperatingLossCarryforwards	2057000	USD
CY2012Q4	us-gaap	Deferred Tax Assets Tax Deferred Expense Compensation And Benefits DeferredTaxAssetsTaxDeferredExpenseCompensationAndBenefits	4896000	USD
CY2013Q4	us-gaap	Deferred Tax Assets Tax Deferred Expense Compensation And Benefits DeferredTaxAssetsTaxDeferredExpenseCompensationAndBenefits	3909000	USD
CY2013Q4	us-gaap	Deferred Tax Assets Tax Deferred Expense Compensation And Benefits Share Based Compensation Cost DeferredTaxAssetsTaxDeferredExpenseCompensationAndBenefitsShareBasedCompensationCost	3742000	USD
CY2012Q4	us-gaap	Deferred Tax Assets Tax Deferred Expense Compensation And Benefits Share Based Compensation Cost DeferredTaxAssetsTaxDeferredExpenseCompensationAndBenefitsShareBasedCompensationCost	3114000	USD
CY2013Q4	us-gaap	Deferred Tax Assets Tax Deferred Expense Other DeferredTaxAssetsTaxDeferredExpenseOther	412000	USD
CY2012Q4	us-gaap	Deferred Tax Assets Tax Deferred Expense Other DeferredTaxAssetsTaxDeferredExpenseOther	418000	USD
CY2012Q4	us-gaap	Deferred Tax Assets Tax Deferred Expense Reserves And Accruals Accrued Liabilities DeferredTaxAssetsTaxDeferredExpenseReservesAndAccrualsAccruedLiabilities	1033000	USD
CY2013Q4	us-gaap	Deferred Tax Assets Tax Deferred Expense Reserves And Accruals Accrued Liabilities DeferredTaxAssetsTaxDeferredExpenseReservesAndAccrualsAccruedLiabilities	1008000	USD
CY2012Q4	us-gaap	Deferred Tax Assets Tax Deferred Expense Reserves And Accruals Self Insurance DeferredTaxAssetsTaxDeferredExpenseReservesAndAccrualsSelfInsurance	5079000	USD
CY2013Q4	us-gaap	Deferred Tax Assets Tax Deferred Expense Reserves And Accruals Self Insurance DeferredTaxAssetsTaxDeferredExpenseReservesAndAccrualsSelfInsurance	5568000	USD
CY2013Q4	us-gaap	Deferred Tax Assets Valuation Allowance DeferredTaxAssetsValuationAllowance	991000	USD
CY2012Q4	us-gaap	Deferred Tax Assets Valuation Allowance DeferredTaxAssetsValuationAllowance	0	USD
CY2012Q4	us-gaap	Deferred Tax Liabilities DeferredTaxLiabilities	18613000	USD
CY2013Q4	us-gaap	Deferred Tax Liabilities DeferredTaxLiabilities	16760000	USD
CY2013Q4	us-gaap	Deferred Tax Liabilities Deferred Expense DeferredTaxLiabilitiesDeferredExpense	5084000	USD
CY2012Q4	us-gaap	Deferred Tax Liabilities Deferred Expense DeferredTaxLiabilitiesDeferredExpense	6929000	USD
CY2013Q4	us-gaap	Deferred Tax Liabilities Deferred Expense Capitalized Software DeferredTaxLiabilitiesDeferredExpenseCapitalizedSoftware	2739000	USD
CY2012Q4	us-gaap	Deferred Tax Liabilities Deferred Expense Capitalized Software DeferredTaxLiabilitiesDeferredExpenseCapitalizedSoftware	3104000	USD
CY2013Q4	us-gaap	Deferred Tax Liabilities Noncurrent DeferredTaxLiabilitiesNoncurrent	7696000	USD
CY2012Q4	us-gaap	Deferred Tax Liabilities Noncurrent DeferredTaxLiabilitiesNoncurrent	9000000	USD
CY2011	us-gaap	Depreciation Depletion And Amortization DepreciationDepletionAndAmortization	15218000	USD
CY2013	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%;text-align:left;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;font-style:italic;">New Accounting Pronouncements</font></div><div style="line-height:120%;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;"><br clear="none"/></font></div><div style="line-height:120%;text-align:left;text-indent:48px;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;">We believe that we have implemented the accounting pronouncements with a material impact on our financial statements and do not believe there are any new or pending announcements that will materially impact our financial position or results of operations.</font></div></div>
CY2013	us-gaap	Dividends Common Stock DividendsCommonStock	17386000	USD
CY2011	us-gaap	Dividends Common Stock DividendsCommonStock	15742000	USD
CY2012	us-gaap	Dividends Common Stock DividendsCommonStock	42728000	USD
CY2012Q4	us-gaap	Drafts Payable DraftsPayable	38275000	USD
CY2013Q4	us-gaap	Drafts Payable DraftsPayable	32252000	USD
CY2013	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	1.25
CY2011	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	1.16
CY2012	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	1.57
CY2012Q1	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	0.54
CY2013Q1	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	0.51
CY2013Q3	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	0.39
CY2012Q3	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	0.45
CY2013Q4	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	0.21
CY2012Q4	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	0.34
CY2013Q2	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	0.14
CY2012Q2	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	0.22
CY2013	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	1.25
CY2011	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	1.16
CY2012	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	1.56
CY2013Q1	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	0.51
CY2013Q3	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	0.39
CY2012Q3	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	0.45
CY2013Q4	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	0.21
CY2012Q4	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	0.34
CY2012Q2	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	0.22
CY2013Q2	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	0.14
CY2012Q1	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	0.54
CY2013	us-gaap	Effective Income Tax Rate Reconciliation At Federal Statutory Income Tax Rate EffectiveIncomeTaxRateReconciliationAtFederalStatutoryIncomeTaxRate	0.3500
CY2013Q4	us-gaap	Employee Service Share Based Compensation Nonvested Awards Total Compensation Cost Not Yet Recognized EmployeeServiceShareBasedCompensationNonvestedAwardsTotalCompensationCostNotYetRecognized	12700000	USD
CY2013	us-gaap	Employee Service Share Based Compensation Nonvested Awards Total Compensation Cost Not Yet Recognized Period For Recognition1 EmployeeServiceShareBasedCompensationNonvestedAwardsTotalCompensationCostNotYetRecognizedPeriodForRecognition1	P22M
CY2013	us-gaap	Employee Service Share Based Compensation Tax Benefit From Compensation Expense EmployeeServiceShareBasedCompensationTaxBenefitFromCompensationExpense	4500000	USD
CY2011	us-gaap	Employee Service Share Based Compensation Tax Benefit From Compensation Expense EmployeeServiceShareBasedCompensationTaxBenefitFromCompensationExpense	3400000	USD
CY2012	us-gaap	Employee Service Share Based Compensation Tax Benefit From Compensation Expense EmployeeServiceShareBasedCompensationTaxBenefitFromCompensationExpense	4000000	USD
CY2011	us-gaap	Excess Tax Benefit From Share Based Compensation Financing Activities ExcessTaxBenefitFromShareBasedCompensationFinancingActivities	2166000	USD
CY2012	us-gaap	Excess Tax Benefit From Share Based Compensation Financing Activities ExcessTaxBenefitFromShareBasedCompensationFinancingActivities	2316000	USD
CY2013	us-gaap	Excess Tax Benefit From Share Based Compensation Financing Activities ExcessTaxBenefitFromShareBasedCompensationFinancingActivities	1621000	USD
CY2013Q4	us-gaap	Finite Lived Intangible Assets Accumulated Amortization FiniteLivedIntangibleAssetsAccumulatedAmortization	5020000	USD
CY2012Q4	us-gaap	Finite Lived Intangible Assets Accumulated Amortization FiniteLivedIntangibleAssetsAccumulatedAmortization	4361000	USD
CY2013Q4	us-gaap	Finite Lived Intangible Assets Amortization Expense Next Twelve Months FiniteLivedIntangibleAssetsAmortizationExpenseNextTwelveMonths	1600000	USD
CY2013Q4	us-gaap	Finite Lived Intangible Assets Amortization Expense Year Five FiniteLivedIntangibleAssetsAmortizationExpenseYearFive	79000	USD
CY2013Q4	us-gaap	Finite Lived Intangible Assets Amortization Expense Year Four FiniteLivedIntangibleAssetsAmortizationExpenseYearFour	522000	USD
CY2013Q4	us-gaap	Finite Lived Intangible Assets Amortization Expense Year Three FiniteLivedIntangibleAssetsAmortizationExpenseYearThree	695000	USD
CY2013Q4	us-gaap	Finite Lived Intangible Assets Amortization Expense Year Two FiniteLivedIntangibleAssetsAmortizationExpenseYearTwo	1300000	USD
CY2012Q4	us-gaap	Finite Lived Intangible Assets Gross FiniteLivedIntangibleAssetsGross	10928000	USD
CY2013Q4	us-gaap	Finite Lived Intangible Assets Gross FiniteLivedIntangibleAssetsGross	9014000	USD
CY2012Q4	us-gaap	Finite Lived Intangible Assets Net FiniteLivedIntangibleAssetsNet	6567000	USD
CY2013Q4	us-gaap	Finite Lived Intangible Assets Net FiniteLivedIntangibleAssetsNet	3994000	USD
CY2013Q4	us-gaap	Flight Equipment Owned Gross FlightEquipmentOwnedGross	35879000	USD
CY2012Q4	us-gaap	Flight Equipment Owned Gross FlightEquipmentOwnedGross	35879000	USD
CY2013Q4	us-gaap	Furniture And Fixtures Gross FurnitureAndFixturesGross	36479000	USD
CY2012Q4	us-gaap	Furniture And Fixtures Gross FurnitureAndFixturesGross	36717000	USD
CY2010Q4	us-gaap	Gain Contingency Unrecorded Amount GainContingencyUnrecordedAmount	2900000	USD
CY2011	us-gaap	Gain Loss On Sale Of Other Assets GainLossOnSaleOfOtherAssets	-4408000	USD
CY2012	us-gaap	Gain Loss On Sale Of Other Assets GainLossOnSaleOfOtherAssets	0	USD
CY2013	us-gaap	Gain Loss On Sale Of Other Assets GainLossOnSaleOfOtherAssets	0	USD
CY2011	us-gaap	Gain Loss On Sales Of Assets And Asset Impairment Charges GainLossOnSalesOfAssetsAndAssetImpairmentCharges	4400000	USD
CY2012	us-gaap	General And Administrative Expense GeneralAndAdministrativeExpense	77564000	USD
CY2011	us-gaap	General And Administrative Expense GeneralAndAdministrativeExpense	75345000	USD
CY2013	us-gaap	General And Administrative Expense GeneralAndAdministrativeExpense	81699000	USD
CY2012Q4	us-gaap	Goodwill Goodwill	17208000	USD
CY2013Q4	us-gaap	Goodwill Goodwill	14440000	USD
CY2013	us-gaap	Goodwill And Intangible Asset Impairment GoodwillAndIntangibleAssetImpairment	3342000	USD
CY2012	us-gaap	Goodwill And Intangible Asset Impairment GoodwillAndIntangibleAssetImpairment	4191000	USD
CY2011	us-gaap	Goodwill And Intangible Asset Impairment GoodwillAndIntangibleAssetImpairment	0	USD
CY2011Q4	us-gaap	Goodwill Gross GoodwillGross	21156000	USD
CY2012Q4	us-gaap	Goodwill Gross GoodwillGross	21156000	USD
CY2012Q4	us-gaap	Goodwill Impaired Accumulated Impairment Loss GoodwillImpairedAccumulatedImpairmentLoss	3948000	USD
CY2011Q4	us-gaap	Goodwill Impaired Accumulated Impairment Loss GoodwillImpairedAccumulatedImpairmentLoss	0	USD
CY2013Q4	us-gaap	Goodwill Impaired Accumulated Impairment Loss GoodwillImpairedAccumulatedImpairmentLoss	6716000	USD
CY2012	us-gaap	Goodwill Impairment Loss GoodwillImpairmentLoss	3948000	USD
CY2013	us-gaap	Goodwill Impairment Loss GoodwillImpairmentLoss	2768000	USD
CY2013	us-gaap	Gross Profit GrossProfit	393251000	USD
CY2012	us-gaap	Gross Profit GrossProfit	382221000	USD
CY2011	us-gaap	Gross Profit GrossProfit	351775000	USD
CY2012Q4	us-gaap	Gross Profit GrossProfit	93503000	USD
CY2013Q1	us-gaap	Gross Profit GrossProfit	108118000	USD
CY2012Q3	us-gaap	Gross Profit GrossProfit	98420000	USD
CY2012Q2	us-gaap	Gross Profit GrossProfit	87294000	USD
CY2013Q4	us-gaap	Gross Profit GrossProfit	89978000	USD
CY2012Q1	us-gaap	Gross Profit GrossProfit	103004000	USD
CY2013Q3	us-gaap	Gross Profit GrossProfit	97409000	USD
CY2013Q2	us-gaap	Gross Profit GrossProfit	97746000	USD
CY2012	us-gaap	Income Loss From Continuing Operations Before Income Taxes Minority Interest And Income Loss From Equity Method Investments IncomeLossFromContinuingOperationsBeforeIncomeTaxesMinorityInterestAndIncomeLossFromEquityMethodInvestments	68290000	USD
CY2011	us-gaap	Income Loss From Continuing Operations Before Income Taxes Minority Interest And Income Loss From Equity Method Investments IncomeLossFromContinuingOperationsBeforeIncomeTaxesMinorityInterestAndIncomeLossFromEquityMethodInvestments	50775000	USD
CY2013	us-gaap	Income Loss From Continuing Operations Before Income Taxes Minority Interest And Income Loss From Equity Method Investments IncomeLossFromContinuingOperationsBeforeIncomeTaxesMinorityInterestAndIncomeLossFromEquityMethodInvestments	53732000	USD
CY2012Q4	us-gaap	Income Tax Examination Liability Recorded IncomeTaxExaminationLiabilityRecorded	2500000	USD
CY2009Q3	us-gaap	Income Tax Examination Liability Recorded IncomeTaxExaminationLiabilityRecorded	470000	USD
CY2013Q4	us-gaap	Income Tax Examination Penalties And Interest Accrued IncomeTaxExaminationPenaltiesAndInterestAccrued	0	USD
CY2012Q4	us-gaap	Income Tax Examination Penalties And Interest Accrued IncomeTaxExaminationPenaltiesAndInterestAccrued	0	USD
CY2011Q4	us-gaap	Income Tax Examination Penalties And Interest Accrued IncomeTaxExaminationPenaltiesAndInterestAccrued	0	USD
CY2013	us-gaap	Income Tax Expense Benefit IncomeTaxExpenseBenefit	21700000	USD
CY2011	us-gaap	Income Tax Expense Benefit IncomeTaxExpenseBenefit	20305000	USD
CY2012	us-gaap	Income Tax Expense Benefit IncomeTaxExpenseBenefit	27888000	USD
CY2012	us-gaap	Income Tax Reconciliation Change In Deferred Tax Assets Valuation Allowance IncomeTaxReconciliationChangeInDeferredTaxAssetsValuationAllowance	0	USD
CY2013	us-gaap	Income Tax Reconciliation Change In Deferred Tax Assets Valuation Allowance IncomeTaxReconciliationChangeInDeferredTaxAssetsValuationAllowance	938000	USD
CY2011	us-gaap	Income Tax Reconciliation Change In Deferred Tax Assets Valuation Allowance IncomeTaxReconciliationChangeInDeferredTaxAssetsValuationAllowance	0	USD
CY2011	us-gaap	Income Tax Reconciliation Deductions Qualified Production Activities IncomeTaxReconciliationDeductionsQualifiedProductionActivities	0	USD
CY2012	us-gaap	Income Tax Reconciliation Deductions Qualified Production Activities IncomeTaxReconciliationDeductionsQualifiedProductionActivities	0	USD
CY2013	us-gaap	Income Tax Reconciliation Deductions Qualified Production Activities IncomeTaxReconciliationDeductionsQualifiedProductionActivities	2531000	USD
CY2012	us-gaap	Income Tax Reconciliation Income Tax Expense Benefit At Federal Statutory Income Tax Rate IncomeTaxReconciliationIncomeTaxExpenseBenefitAtFederalStatutoryIncomeTaxRate	23901000	USD
CY2011	us-gaap	Income Tax Reconciliation Income Tax Expense Benefit At Federal Statutory Income Tax Rate IncomeTaxReconciliationIncomeTaxExpenseBenefitAtFederalStatutoryIncomeTaxRate	17770000	USD
CY2013	us-gaap	Income Tax Reconciliation Income Tax Expense Benefit At Federal Statutory Income Tax Rate IncomeTaxReconciliationIncomeTaxExpenseBenefitAtFederalStatutoryIncomeTaxRate	18806000	USD
CY2011	us-gaap	Income Tax Reconciliation Nondeductible Expense IncomeTaxReconciliationNondeductibleExpense	904000	USD
CY2013	us-gaap	Income Tax Reconciliation Nondeductible Expense IncomeTaxReconciliationNondeductibleExpense	1993000	USD
CY2012	us-gaap	Income Tax Reconciliation Nondeductible Expense IncomeTaxReconciliationNondeductibleExpense	1663000	USD
CY2013	us-gaap	Income Tax Reconciliation Nondeductible Expense Impairment Losses IncomeTaxReconciliationNondeductibleExpenseImpairmentLosses	797000	USD
CY2012	us-gaap	Income Tax Reconciliation Nondeductible Expense Impairment Losses IncomeTaxReconciliationNondeductibleExpenseImpairmentLosses	0	USD
CY2011	us-gaap	Income Tax Reconciliation Nondeductible Expense Impairment Losses IncomeTaxReconciliationNondeductibleExpenseImpairmentLosses	0	USD
CY2011	us-gaap	Income Tax Reconciliation Other Adjustments IncomeTaxReconciliationOtherAdjustments	-60000	USD
CY2012	us-gaap	Income Tax Reconciliation Other Adjustments IncomeTaxReconciliationOtherAdjustments	-173000	USD
CY2013	us-gaap	Income Tax Reconciliation Other Adjustments IncomeTaxReconciliationOtherAdjustments	-55000	USD
CY2013	us-gaap	Income Tax Reconciliation State And Local Income Taxes IncomeTaxReconciliationStateAndLocalIncomeTaxes	2286000	USD
CY2012	us-gaap	Income Tax Reconciliation State And Local Income Taxes IncomeTaxReconciliationStateAndLocalIncomeTaxes	2497000	USD
CY2011	us-gaap	Income Tax Reconciliation State And Local Income Taxes IncomeTaxReconciliationStateAndLocalIncomeTaxes	2249000	USD
CY2011	us-gaap	Income Tax Reconciliation Tax Credits Research IncomeTaxReconciliationTaxCreditsResearch	558000	USD
CY2013	us-gaap	Income Tax Reconciliation Tax Credits Research IncomeTaxReconciliationTaxCreditsResearch	534000	USD
CY2012	us-gaap	Income Tax Reconciliation Tax Credits Research IncomeTaxReconciliationTaxCreditsResearch	0	USD
CY2012	us-gaap	Income Taxes Paid IncomeTaxesPaid	24924000	USD
CY2013	us-gaap	Income Taxes Paid IncomeTaxesPaid	27191000	USD
CY2011	us-gaap	Income Taxes Paid IncomeTaxesPaid	19782000	USD
CY2012Q4	us-gaap	Income Taxes Receivable IncomeTaxesReceivable	0	USD
CY2013Q4	us-gaap	Income Taxes Receivable IncomeTaxesReceivable	409000	USD
CY2012	us-gaap	Increase Decrease In Accounts Payable Trade IncreaseDecreaseInAccountsPayableTrade	-1425000	USD
CY2011	us-gaap	Increase Decrease In Accounts Payable Trade IncreaseDecreaseInAccountsPayableTrade	1776000	USD
CY2013	us-gaap	Increase Decrease In Accounts Payable Trade IncreaseDecreaseInAccountsPayableTrade	-982000	USD
CY2012	us-gaap	Increase Decrease In Accounts Receivable IncreaseDecreaseInAccountsReceivable	19453000	USD
CY2011	us-gaap	Increase Decrease In Accounts Receivable IncreaseDecreaseInAccountsReceivable	28826000	USD
CY2013	us-gaap	Increase Decrease In Accounts Receivable IncreaseDecreaseInAccountsReceivable	19623000	USD
CY2012	us-gaap	Increase Decrease In Accrued Salaries IncreaseDecreaseInAccruedSalaries	19753000	USD
CY2013	us-gaap	Increase Decrease In Accrued Salaries IncreaseDecreaseInAccruedSalaries	23731000	USD
CY2011	us-gaap	Increase Decrease In Accrued Salaries IncreaseDecreaseInAccruedSalaries	20620000	USD
CY2011	us-gaap	Increase Decrease In Employee Related Liabilities IncreaseDecreaseInEmployeeRelatedLiabilities	2500000	USD
CY2013	us-gaap	Increase Decrease In Health Care Insurance Liabilities IncreaseDecreaseInHealthCareInsuranceLiabilities	-8839000	USD
CY2011	us-gaap	Increase Decrease In Health Care Insurance Liabilities IncreaseDecreaseInHealthCareInsuranceLiabilities	-5992000	USD
CY2012	us-gaap	Increase Decrease In Health Care Insurance Liabilities IncreaseDecreaseInHealthCareInsuranceLiabilities	4515000	USD
CY2012	us-gaap	Increase Decrease In Income Taxes IncreaseDecreaseInIncomeTaxes	6392000	USD
CY2011	us-gaap	Increase Decrease In Income Taxes IncreaseDecreaseInIncomeTaxes	-1597000	USD
CY2013	us-gaap	Increase Decrease In Income Taxes IncreaseDecreaseInIncomeTaxes	-4825000	USD
CY2012Q2	us-gaap	Increase Decrease In Income Taxes Receivable IncreaseDecreaseInIncomeTaxesReceivable	2900000	USD
CY2013	us-gaap	Increase Decrease In Other Current Assets IncreaseDecreaseInOtherCurrentAssets	2402000	USD
CY2011	us-gaap	Increase Decrease In Other Current Assets IncreaseDecreaseInOtherCurrentAssets	2862000	USD
CY2012	us-gaap	Increase Decrease In Other Current Assets IncreaseDecreaseInOtherCurrentAssets	-1837000	USD
CY2012	us-gaap	Increase Decrease In Other Employee Related Liabilities IncreaseDecreaseInOtherEmployeeRelatedLiabilities	9922000	USD
CY2011	us-gaap	Increase Decrease In Other Employee Related Liabilities IncreaseDecreaseInOtherEmployeeRelatedLiabilities	23556000	USD
CY2013	us-gaap	Increase Decrease In Other Employee Related Liabilities IncreaseDecreaseInOtherEmployeeRelatedLiabilities	-12930000	USD
CY2013	us-gaap	Increase Decrease In Other Operating Assets IncreaseDecreaseInOtherOperatingAssets	18060000	USD
CY2012	us-gaap	Increase Decrease In Other Operating Assets IncreaseDecreaseInOtherOperatingAssets	12924000	USD
CY2011	us-gaap	Increase Decrease In Other Operating Assets IncreaseDecreaseInOtherOperatingAssets	652000	USD
CY2011	us-gaap	Increase Decrease In Prepaid Expense IncreaseDecreaseInPrepaidExpense	-3678000	USD
CY2012	us-gaap	Increase Decrease In Prepaid Expense IncreaseDecreaseInPrepaidExpense	-5680000	USD
CY2013	us-gaap	Increase Decrease In Prepaid Expense IncreaseDecreaseInPrepaidExpense	-4982000	USD
CY2013	us-gaap	Increase Decrease In Workers Compensation Liabilities IncreaseDecreaseInWorkersCompensationLiabilities	7815000	USD
CY2012	us-gaap	Increase Decrease In Workers Compensation Liabilities IncreaseDecreaseInWorkersCompensationLiabilities	7418000	USD
CY2011	us-gaap	Increase Decrease In Workers Compensation Liabilities IncreaseDecreaseInWorkersCompensationLiabilities	8791000	USD
CY2011	us-gaap	Interest Income Expense Nonoperating Net InterestIncomeExpenseNonoperatingNet	969000	USD
CY2013	us-gaap	Interest Income Expense Nonoperating Net InterestIncomeExpenseNonoperatingNet	158000	USD
CY2012	us-gaap	Interest Income Expense Nonoperating Net InterestIncomeExpenseNonoperatingNet	609000	USD
CY2013	us-gaap	Investment Income Net Amortization Of Discount And Premium InvestmentIncomeNetAmortizationOfDiscountAndPremium	-2119000	USD
CY2011	us-gaap	Investment Income Net Amortization Of Discount And Premium InvestmentIncomeNetAmortizationOfDiscountAndPremium	-2172000	USD
CY2012	us-gaap	Investment Income Net Amortization Of Discount And Premium InvestmentIncomeNetAmortizationOfDiscountAndPremium	-2295000	USD
CY2012	us-gaap	Net Cash Provided By Used In Financing Activities NetCashProvidedByUsedInFinancingActivities	-55320000	USD
CY2013	us-gaap	Net Cash Provided By Used In Investing Activities NetCashProvidedByUsedInInvestingActivities	-43034000	USD
CY2013	us-gaap	Net Income Loss NetIncomeLoss	32032000	USD
CY2011	us-gaap	Net Cash Provided By Used In Investing Activities NetCashProvidedByUsedInInvestingActivities	-61697000	USD
CY2012Q4	us-gaap	Land Land	4115000	USD
CY2013Q4	us-gaap	Land Land	4115000	USD
CY2013Q4	us-gaap	Liabilities And Stockholders Equity LiabilitiesAndStockholdersEquity	766560000	USD
CY2012Q4	us-gaap	Liabilities And Stockholders Equity LiabilitiesAndStockholdersEquity	750200000	USD
CY2012Q4	us-gaap	Liabilities Current LiabilitiesCurrent	435759000	USD
CY2013Q4	us-gaap	Liabilities Current LiabilitiesCurrent	436687000	USD
CY2013Q4	us-gaap	Liabilities Noncurrent LiabilitiesNoncurrent	76601000	USD
CY2012Q4	us-gaap	Liabilities Noncurrent LiabilitiesNoncurrent	73536000	USD
CY2013Q4	us-gaap	Line Of Credit Facility Current Borrowing Capacity LineOfCreditFacilityCurrentBorrowingCapacity	100000000	USD
CY2013Q4	us-gaap	Line Of Credit Facility Maximum Borrowing Capacity LineOfCreditFacilityMaximumBorrowingCapacity	150000000	USD
CY2013	us-gaap	Line Of Credit Facility Unused Capacity Commitment Fee Percentage LineOfCreditFacilityUnusedCapacityCommitmentFeePercentage	0.0025
CY2011	us-gaap	Litigation Settlement Expense LitigationSettlementExpense	3100000	USD
CY2013Q4	us-gaap	Loss Contingency Range Of Possible Loss Maximum LossContingencyRangeOfPossibleLossMaximum	2000000	USD
CY2013Q4	us-gaap	Loss Contingency Range Of Possible Loss Minimum LossContingencyRangeOfPossibleLossMinimum	1000000	USD
CY2013Q4	us-gaap	Marketable Securities Current MarketableSecuritiesCurrent	46340000	USD
CY2012Q4	us-gaap	Marketable Securities Current MarketableSecuritiesCurrent	16904000	USD
CY2013Q4	us-gaap	Money Market Funds At Carrying Value MoneyMarketFundsAtCarryingValue	42913000	USD
CY2012Q4	us-gaap	Money Market Funds At Carrying Value MoneyMarketFundsAtCarryingValue	26087000	USD
CY2011	us-gaap	Net Cash Provided By Used In Financing Activities NetCashProvidedByUsedInFinancingActivities	-35835000	USD
CY2013	us-gaap	Net Cash Provided By Used In Financing Activities NetCashProvidedByUsedInFinancingActivities	-30419000	USD
CY2012	us-gaap	Net Cash Provided By Used In Investing Activities NetCashProvidedByUsedInInvestingActivities	17858000	USD
CY2011	us-gaap	Net Cash Provided By Used In Operating Activities NetCashProvidedByUsedInOperatingActivities	73911000	USD
CY2012	us-gaap	Net Cash Provided By Used In Operating Activities NetCashProvidedByUsedInOperatingActivities	90798000	USD
CY2013	us-gaap	Net Cash Provided By Used In Operating Activities NetCashProvidedByUsedInOperatingActivities	34664000	USD
CY2011	us-gaap	Net Income Loss NetIncomeLoss	30470000	USD
CY2012	us-gaap	Net Income Loss NetIncomeLoss	40402000	USD
CY2012Q2	us-gaap	Net Income Loss NetIncomeLoss	5621000	USD
CY2012Q3	us-gaap	Net Income Loss NetIncomeLoss	11452000	USD
CY2013Q2	us-gaap	Net Income Loss NetIncomeLoss	3488000	USD
CY2013Q3	us-gaap	Net Income Loss NetIncomeLoss	10082000	USD
CY2013Q1	us-gaap	Net Income Loss NetIncomeLoss	13173000	USD
CY2013Q4	us-gaap	Net Income Loss NetIncomeLoss	5289000	USD
CY2012Q1	us-gaap	Net Income Loss NetIncomeLoss	13884000	USD
CY2012Q4	us-gaap	Net Income Loss NetIncomeLoss	9445000	USD
CY2013	us-gaap	Number Of Reportable Segments NumberOfReportableSegments	1
CY2011	us-gaap	Operating Expenses OperatingExpenses	294461000	USD
CY2012	us-gaap	Operating Expenses OperatingExpenses	314727000	USD
CY2013	us-gaap	Operating Expenses OperatingExpenses	337028000	USD
CY2012	us-gaap	Operating Income Loss OperatingIncomeLoss	67494000	USD
CY2011	us-gaap	Operating Income Loss OperatingIncomeLoss	57314000	USD
CY2013	us-gaap	Operating Income Loss OperatingIncomeLoss	56223000	USD
CY2012Q4	us-gaap	Operating Income Loss OperatingIncomeLoss	15893000	USD
CY2013Q2	us-gaap	Operating Income Loss OperatingIncomeLoss	10228000	USD
CY2013Q1	us-gaap	Operating Income Loss OperatingIncomeLoss	22009000	USD
CY2012Q3	us-gaap	Operating Income Loss OperatingIncomeLoss	19140000	USD
CY2012Q1	us-gaap	Operating Income Loss OperatingIncomeLoss	23046000	USD
CY2012Q2	us-gaap	Operating Income Loss OperatingIncomeLoss	9415000	USD
CY2013Q3	us-gaap	Operating Income Loss OperatingIncomeLoss	17112000	USD
CY2013Q4	us-gaap	Operating Income Loss OperatingIncomeLoss	6874000	USD
CY2013Q4	us-gaap	Operating Leases Future Minimum Payments Due OperatingLeasesFutureMinimumPaymentsDue	51987000	USD
CY2013Q4	us-gaap	Operating Leases Future Minimum Payments Due Current OperatingLeasesFutureMinimumPaymentsDueCurrent	12763000	USD
CY2013Q4	us-gaap	Operating Leases Future Minimum Payments Due In Five Years OperatingLeasesFutureMinimumPaymentsDueInFiveYears	5091000	USD
CY2013Q4	us-gaap	Operating Leases Future Minimum Payments Due In Four Years OperatingLeasesFutureMinimumPaymentsDueInFourYears	6507000	USD
CY2013Q4	us-gaap	Operating Leases Future Minimum Payments Due In Three Years OperatingLeasesFutureMinimumPaymentsDueInThreeYears	9776000	USD
CY2013Q4	us-gaap	Operating Leases Future Minimum Payments Due In Two Years OperatingLeasesFutureMinimumPaymentsDueInTwoYears	11985000	USD
CY2013Q4	us-gaap	Operating Leases Future Minimum Payments Due Thereafter OperatingLeasesFutureMinimumPaymentsDueThereafter	5865000	USD
CY2012	us-gaap	Operating Leases Rent Expense Net OperatingLeasesRentExpenseNet	13800000	USD
CY2013	us-gaap	Operating Leases Rent Expense Net OperatingLeasesRentExpenseNet	13900000	USD
CY2011	us-gaap	Operating Leases Rent Expense Net OperatingLeasesRentExpenseNet	14000000	USD
CY2013Q4	us-gaap	Other Assets OtherAssets	114828000	USD
CY2012Q4	us-gaap	Other Assets OtherAssets	104793000	USD
CY2012Q4	us-gaap	Other Assets Current OtherAssetsCurrent	9651000	USD
CY2013Q4	us-gaap	Other Assets Current OtherAssetsCurrent	12053000	USD
CY2012Q4	us-gaap	Other Assets Noncurrent OtherAssetsNoncurrent	4817000	USD
CY2013Q4	us-gaap	Other Assets Noncurrent OtherAssetsNoncurrent	1816000	USD
CY2012	us-gaap	Other Comprehensive Income Unrealized Holding Gain Loss On Securities Arising During Period Net Of Tax OtherComprehensiveIncomeUnrealizedHoldingGainLossOnSecuritiesArisingDuringPeriodNetOfTax	-8000	USD
CY2011	us-gaap	Other Comprehensive Income Unrealized Holding Gain Loss On Securities Arising During Period Net Of Tax OtherComprehensiveIncomeUnrealizedHoldingGainLossOnSecuritiesArisingDuringPeriodNetOfTax	3000	USD
CY2013	us-gaap	Other Comprehensive Income Unrealized Holding Gain Loss On Securities Arising During Period Net Of Tax OtherComprehensiveIncomeUnrealizedHoldingGainLossOnSecuritiesArisingDuringPeriodNetOfTax	13000	USD
CY2013	us-gaap	Other Nonoperating Income Expense OtherNonoperatingIncomeExpense	-2649000	USD
CY2011	us-gaap	Other Nonoperating Income Expense OtherNonoperatingIncomeExpense	-7508000	USD
CY2012	us-gaap	Proceeds From Payments For Other Financing Activities ProceedsFromPaymentsForOtherFinancingActivities	-222000	USD
CY2013Q4	us-gaap	Prepaid Insurance PrepaidInsurance	10638000	USD
CY2012	us-gaap	Other Nonoperating Income Expense OtherNonoperatingIncomeExpense	187000	USD
CY2012Q4	us-gaap	Other Receivables OtherReceivables	2415000	USD
CY2013Q4	us-gaap	Other Receivables OtherReceivables	2928000	USD
CY2012	us-gaap	Participating Securities Distributed And Undistributed Earnings ParticipatingSecuritiesDistributedAndUndistributedEarnings	1224000	USD
CY2013	us-gaap	Participating Securities Distributed And Undistributed Earnings ParticipatingSecuritiesDistributedAndUndistributedEarnings	916000	USD
CY2011	us-gaap	Participating Securities Distributed And Undistributed Earnings ParticipatingSecuritiesDistributedAndUndistributedEarnings	908000	USD
CY2011	us-gaap	Payments For Flight Equipment PaymentsForFlightEquipment	10000000	USD
CY2011	us-gaap	Payments For Repurchase Of Common Stock PaymentsForRepurchaseOfCommonStock	0	USD
CY2012	us-gaap	Payments For Repurchase Of Common Stock PaymentsForRepurchaseOfCommonStock	3162000	USD
CY2013	us-gaap	Payments For Repurchase Of Common Stock PaymentsForRepurchaseOfCommonStock	0	USD
CY2012	us-gaap	Payments Of Dividends Common Stock PaymentsOfDividendsCommonStock	42728000	USD
CY2013	us-gaap	Payments Of Dividends Common Stock PaymentsOfDividendsCommonStock	17386000	USD
CY2011	us-gaap	Payments Of Dividends Common Stock PaymentsOfDividendsCommonStock	15742000	USD
CY2011	us-gaap	Payments To Acquire Marketable Securities PaymentsToAcquireMarketableSecurities	51397000	USD
CY2013	us-gaap	Payments To Acquire Marketable Securities PaymentsToAcquireMarketableSecurities	54756000	USD
CY2012	us-gaap	Payments To Acquire Marketable Securities PaymentsToAcquireMarketableSecurities	30680000	USD
CY2011	us-gaap	Payments To Acquire Property Plant And Equipment PaymentsToAcquirePropertyPlantAndEquipment	31440000	USD
CY2012	us-gaap	Payments To Acquire Property Plant And Equipment PaymentsToAcquirePropertyPlantAndEquipment	17631000	USD
CY2013	us-gaap	Payments To Acquire Property Plant And Equipment PaymentsToAcquirePropertyPlantAndEquipment	11562000	USD
CY2012Q4	us-gaap	Preferred Stock Par Or Stated Value Per Share PreferredStockParOrStatedValuePerShare	0.01
CY2013Q4	us-gaap	Preferred Stock Par Or Stated Value Per Share PreferredStockParOrStatedValuePerShare	0.01
CY2012Q4	us-gaap	Preferred Stock Shares Authorized PreferredStockSharesAuthorized	20000000	shares
CY2013Q4	us-gaap	Preferred Stock Shares Authorized PreferredStockSharesAuthorized	20000000	shares
CY2013Q4	us-gaap	Preferred Stock Shares Issued PreferredStockSharesIssued	0	shares
CY2012Q4	us-gaap	Preferred Stock Shares Issued PreferredStockSharesIssued	0	shares
CY2013Q4	us-gaap	Preferred Stock Shares Outstanding PreferredStockSharesOutstanding	0	shares
CY2012Q4	us-gaap	Preferred Stock Shares Outstanding PreferredStockSharesOutstanding	0	shares
CY2012Q4	us-gaap	Preferred Stock Value PreferredStockValue	0	USD
CY2013Q4	us-gaap	Preferred Stock Value PreferredStockValue	0	USD
CY2012Q4	us-gaap	Prepaid Insurance PrepaidInsurance	15620000	USD
CY2013	us-gaap	Prior Period Reclassification Adjustment Description PriorPeriodReclassificationAdjustmentDescription	<div style="font-family:Times New Roman;font-size:10pt;"><div style="line-height:120%;text-align:left;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;font-style:italic;">Reclassifications</font></div><div style="line-height:120%;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;"><br clear="none"/></font></div><div style="line-height:120%;text-align:left;text-indent:48px;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;">Certain prior year amounts have been reclassified to conform to the </font><font style="font-family:inherit;font-size:10pt;color:#000000;text-decoration:none;">2013</font><font style="font-family:inherit;font-size:10pt;"> presentation.</font></div></div>
CY2013	us-gaap	Proceeds From Payments For Other Financing Activities ProceedsFromPaymentsForOtherFinancingActivities	1127000	USD
CY2011	us-gaap	Proceeds From Payments For Other Financing Activities ProceedsFromPaymentsForOtherFinancingActivities	-1136000	USD
CY2012	us-gaap	Proceeds From Sale And Maturity Of Marketable Securities ProceedsFromSaleAndMaturityOfMarketableSecurities	32619000	USD
CY2011	us-gaap	Proceeds From Sale And Maturity Of Marketable Securities ProceedsFromSaleAndMaturityOfMarketableSecurities	31706000	USD
CY2012	us-gaap	Proceeds From Sale Of Property Plant And Equipment ProceedsFromSaleOfPropertyPlantAndEquipment	69000	USD
CY2013	us-gaap	Proceeds From Sale Of Property Plant And Equipment ProceedsFromSaleOfPropertyPlantAndEquipment	57000	USD
CY2011	us-gaap	Proceeds From Sale Of Property Plant And Equipment ProceedsFromSaleOfPropertyPlantAndEquipment	82000	USD
CY2011	us-gaap	Proceeds From Stock Options Exercised ProceedsFromStockOptionsExercised	3956000	USD
CY2012	us-gaap	Proceeds From Stock Options Exercised ProceedsFromStockOptionsExercised	2249000	USD
CY2013	us-gaap	Proceeds From Stock Options Exercised ProceedsFromStockOptionsExercised	1448000	USD
CY2012Q4	us-gaap	Property Plant And Equipment Gross PropertyPlantAndEquipmentGross	262300000	USD
CY2013Q4	us-gaap	Property Plant And Equipment Gross PropertyPlantAndEquipmentGross	268175000	USD
CY2013Q4	us-gaap	Property Plant And Equipment Net PropertyPlantAndEquipmentNet	86415000	USD
CY2013	us-gaap	Proceeds From Sale And Maturity Of Marketable Securities ProceedsFromSaleAndMaturityOfMarketableSecurities	15201000	USD
CY2012Q4	us-gaap	Property Plant And Equipment Net PropertyPlantAndEquipmentNet	93942000	USD
CY2013	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Equity Instruments Other Than Options Vested In Period Total Fair Value ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsVestedInPeriodTotalFairValue	12300000	USD
CY2013Q4	us-gaap	Restricted Cash And Cash Equivalents RestrictedCashAndCashEquivalents	51900000	USD
CY2013Q4	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Options Exercisable Weighted Average Exercise Price ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsExercisableWeightedAverageExercisePrice	24.24
CY2013	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Equity Instruments Other Than Options Vested In Period Weighted Average Grant Date Fair Value ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsVestedInPeriodWeightedAverageGrantDateFairValue	25.57
CY2012Q4	us-gaap	Restricted Cash And Cash Equivalents At Carrying Value RestrictedCashAndCashEquivalentsAtCarryingValue	47149000	USD
CY2013Q4	us-gaap	Restricted Cash And Cash Equivalents At Carrying Value RestrictedCashAndCashEquivalentsAtCarryingValue	51928000	USD
CY2012Q4	us-gaap	Retained Earnings Accumulated Deficit RetainedEarningsAccumulatedDeficit	241324000	USD
CY2013Q4	us-gaap	Retained Earnings Accumulated Deficit RetainedEarningsAccumulatedDeficit	255970000	USD
CY2012	us-gaap	Sales Commissions And Fees SalesCommissionsAndFees	14515000	USD
CY2011	us-gaap	Sales Commissions And Fees SalesCommissionsAndFees	13451000	USD
CY2013	us-gaap	Sales Commissions And Fees SalesCommissionsAndFees	14581000	USD
CY2011	us-gaap	Sales Revenue Net SalesRevenueNet	1976219000	USD
CY2013	us-gaap	Sales Revenue Net SalesRevenueNet	2256112000	USD
CY2012	us-gaap	Sales Revenue Net SalesRevenueNet	2158824000	USD
CY2012Q1	us-gaap	Sales Revenue Net SalesRevenueNet	595177000	USD
CY2012Q2	us-gaap	Sales Revenue Net SalesRevenueNet	519256000	USD
CY2012Q4	us-gaap	Sales Revenue Net SalesRevenueNet	532438000	USD
CY2013Q2	us-gaap	Sales Revenue Net SalesRevenueNet	547274000	USD
CY2013Q4	us-gaap	Sales Revenue Net SalesRevenueNet	557133000	USD
CY2013Q1	us-gaap	Sales Revenue Net SalesRevenueNet	611836000	USD
CY2013Q3	us-gaap	Sales Revenue Net SalesRevenueNet	539869000	USD
CY2012Q3	us-gaap	Sales Revenue Net SalesRevenueNet	511953000	USD
CY2012	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Equity Instruments Other Than Options Vested In Period Total Fair Value ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsVestedInPeriodTotalFairValue	11700000	USD
CY2011	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Equity Instruments Other Than Options Vested In Period Total Fair Value ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsVestedInPeriodTotalFairValue	11100000	USD
CY2013	us-gaap	Share Based Compensation ShareBasedCompensation	11103000	USD
CY2012	us-gaap	Share Based Compensation ShareBasedCompensation	9814000	USD
CY2011	us-gaap	Share Based Compensation ShareBasedCompensation	8601000	USD
CY2013	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Equity Instruments Other Than Options Forfeited In Period ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsForfeitedInPeriod	19000	shares
CY2013	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Equity Instruments Other Than Options Forfeitures Weighted Average Grant Date Fair Value ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsForfeituresWeightedAverageGrantDateFairValue	29.58
CY2013	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Equity Instruments Other Than Options Grants In Period ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsGrantsInPeriod	407000	shares
CY2013	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Equity Instruments Other Than Options Grants In Period Weighted Average Grant Date Fair Value ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsGrantsInPeriodWeightedAverageGrantDateFairValue	29.25
CY2012	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Equity Instruments Other Than Options Grants In Period Weighted Average Grant Date Fair Value ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsGrantsInPeriodWeightedAverageGrantDateFairValue	30.47
CY2011	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Equity Instruments Other Than Options Grants In Period Weighted Average Grant Date Fair Value ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsGrantsInPeriodWeightedAverageGrantDateFairValue	29.47
CY2013Q4	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Equity Instruments Other Than Options Nonvested Number ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedNumber	740000	shares
CY2012Q4	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Equity Instruments Other Than Options Nonvested Number ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedNumber	751000	shares
CY2013Q4	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Equity Instruments Other Than Options Nonvested Weighted Average Grant Date Fair Value ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedWeightedAverageGrantDateFairValue	29.66
CY2012Q4	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Equity Instruments Other Than Options Nonvested Weighted Average Grant Date Fair Value ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedWeightedAverageGrantDateFairValue	27.70
CY2013	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Equity Instruments Other Than Options Vested In Period ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsVestedInPeriod	399000	shares
CY2013Q4	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Number Of Shares Authorized ShareBasedCompensationArrangementByShareBasedPaymentAwardNumberOfSharesAuthorized	3600000	shares
CY2013Q4	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Number Of Shares Available For Grant ShareBasedCompensationArrangementByShareBasedPaymentAwardNumberOfSharesAvailableForGrant	1499221	shares
CY2013Q4	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Options Exercisable Number ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsExercisableNumber	61000	shares
CY2011	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Options Exercises In Period Total Intrinsic Value ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsExercisesInPeriodTotalIntrinsicValue	2200000	USD
CY2012	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Options Exercises In Period Total Intrinsic Value ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsExercisesInPeriodTotalIntrinsicValue	2500000	USD
CY2013	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Options Exercises In Period Total Intrinsic Value ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsExercisesInPeriodTotalIntrinsicValue	1500000	USD
CY2013	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Options Forfeitures And Expirations In Period ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsForfeituresAndExpirationsInPeriod	0	shares
CY2013	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Options Forfeitures And Expirations In Period Weighted Average Exercise Price ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsForfeituresAndExpirationsInPeriodWeightedAverageExercisePrice	0.00
CY2013	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Options Grants In Period ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsGrantsInPeriod	0	shares
CY2013Q4	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Options Outstanding Intrinsic Value ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingIntrinsicValue	731000	USD
CY2013Q4	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Options Outstanding Number ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingNumber	61000	shares
CY2012Q4	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Options Outstanding Number ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingNumber	152000	shares
CY2012Q4	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Options Outstanding Weighted Average Exercise Price ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingWeightedAverageExercisePrice	19.30
CY2013Q4	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Options Outstanding Weighted Average Exercise Price ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingWeightedAverageExercisePrice	24.24
CY2013	us-gaap	Share Based Compensation Arrangements By Share Based Payment Award Options Exercises In Period Weighted Average Exercise Price ShareBasedCompensationArrangementsByShareBasedPaymentAwardOptionsExercisesInPeriodWeightedAverageExercisePrice	15.95
CY2013	us-gaap	Share Based Compensation Arrangements By Share Based Payment Award Options Grants In Period Weighted Average Exercise Price ShareBasedCompensationArrangementsByShareBasedPaymentAwardOptionsGrantsInPeriodWeightedAverageExercisePrice	0.00
CY2013Q4	us-gaap	Sharebased Compensation Arrangement By Sharebased Payment Award Options Exercisable Intrinsic Value1 SharebasedCompensationArrangementBySharebasedPaymentAwardOptionsExercisableIntrinsicValue1	731000	USD
CY2013	us-gaap	Sharebased Compensation Arrangement By Sharebased Payment Award Options Outstanding Weighted Average Remaining Contractual Term2 SharebasedCompensationArrangementBySharebasedPaymentAwardOptionsOutstandingWeightedAverageRemainingContractualTerm2	P4Y7M
CY2013	us-gaap	Sharebased Compensation Shares Authorized Under Stock Option Plans Exercise Price Range Exercisable Options Weighted Average Remaining Contractual Term2 SharebasedCompensationSharesAuthorizedUnderStockOptionPlansExercisePriceRangeExercisableOptionsWeightedAverageRemainingContractualTerm2	P4Y7M
CY2012	us-gaap	Shares Paid For Tax Withholding For Share Based Compensation SharesPaidForTaxWithholdingForShareBasedCompensation	107293	shares
CY2013	us-gaap	Shares Paid For Tax Withholding For Share Based Compensation SharesPaidForTaxWithholdingForShareBasedCompensation	116931	shares
CY2012	us-gaap	Stock Issued During Period Shares Employee Stock Purchase Plans StockIssuedDuringPeriodSharesEmployeeStockPurchasePlans	37000	shares
CY2011	us-gaap	Stock Issued During Period Shares Employee Stock Purchase Plans StockIssuedDuringPeriodSharesEmployeeStockPurchasePlans	35000	shares
CY2013	us-gaap	Stock Issued During Period Shares Employee Stock Purchase Plans StockIssuedDuringPeriodSharesEmployeeStockPurchasePlans	34000	shares
CY2013	us-gaap	Stock Issued During Period Shares Stock Options Exercised StockIssuedDuringPeriodSharesStockOptionsExercised	91000	shares
CY2012	us-gaap	Stock Issued During Period Value Stock Options Exercised StockIssuedDuringPeriodValueStockOptionsExercised	2249000	USD
CY2011	us-gaap	Stock Issued During Period Value Stock Options Exercised StockIssuedDuringPeriodValueStockOptionsExercised	3956000	USD
CY2013	us-gaap	Stock Issued During Period Value Stock Options Exercised StockIssuedDuringPeriodValueStockOptionsExercised	1448000	USD
CY2013Q4	us-gaap	Stock Repurchase Program Number Of Shares Authorized To Be Repurchased StockRepurchaseProgramNumberOfSharesAuthorizedToBeRepurchased	15500000	shares
CY2013Q4	us-gaap	Stock Repurchase Program Remaining Number Of Shares Authorized To Be Repurchased StockRepurchaseProgramRemainingNumberOfSharesAuthorizedToBeRepurchased	1349569	shares
CY2012	us-gaap	Stock Repurchased And Retired During Period Value StockRepurchasedAndRetiredDuringPeriodValue	3162000	USD
CY2013Q4	us-gaap	Stockholders Equity StockholdersEquity	253272000	USD
CY2012Q4	us-gaap	Stockholders Equity StockholdersEquity	240905000	USD
CY2010Q4	us-gaap	Stockholders Equity StockholdersEquity	240395000	USD
CY2011Q4	us-gaap	Stockholders Equity StockholdersEquity	245207000	USD
CY2013	us-gaap	Stockholders Equity Other StockholdersEquityOther	-1127000	USD
CY2011	us-gaap	Stockholders Equity Other StockholdersEquityOther	-940000	USD
CY2012	us-gaap	Stockholders Equity Other StockholdersEquityOther	-1153000	USD
CY2012Q4	us-gaap	Taxes Payable Current TaxesPayableCurrent	4054000	USD
CY2013Q4	us-gaap	Taxes Payable Current TaxesPayableCurrent	0	USD
CY2012Q4	us-gaap	Treasury Stock Shares TreasuryStockShares	5096000	shares
CY2013Q4	us-gaap	Treasury Stock Shares TreasuryStockShares	5175000	shares
CY2012	us-gaap	Treasury Stock Shares Acquired TreasuryStockSharesAcquired	407400	shares
CY2013	us-gaap	Treasury Stock Shares Acquired TreasuryStockSharesAcquired	479903	shares
CY2011Q4	us-gaap	Workers Compensation Liability Current And Noncurrent WorkersCompensationLiabilityCurrentAndNoncurrent	104791000	USD
CY2012Q4	us-gaap	Workers Compensation Liability Current And Noncurrent WorkersCompensationLiabilityCurrentAndNoncurrent	111685000	USD
CY2013Q4	us-gaap	Workers Compensation Liability Noncurrent WorkersCompensationLiabilityNoncurrent	68905000	USD
CY2012Q4	us-gaap	Workers Compensation Liability Noncurrent WorkersCompensationLiabilityNoncurrent	64536000	USD
CY2013	nsp	Accounts Receivable Due Date Prior To Applicable Payroll Date AccountsReceivableDueDatePriorToApplicablePayrollDate	P1D
CY2012Q4	nsp	Accrued Corporate Payroll And Commissions Earned AccruedCorporatePayrollAndCommissionsEarned	23537000	USD
CY2013Q4	us-gaap	Treasury Stock Value TreasuryStockValue	138688000	USD
CY2012Q4	us-gaap	Treasury Stock Value TreasuryStockValue	133950000	USD
CY2011	us-gaap	Treasury Stock Value Acquired Cost Method TreasuryStockValueAcquiredCostMethod	25079000	USD
CY2012	us-gaap	Treasury Stock Value Acquired Cost Method TreasuryStockValueAcquiredCostMethod	13773000	USD
CY2013	us-gaap	Treasury Stock Value Acquired Cost Method TreasuryStockValueAcquiredCostMethod	17229000	USD
CY2012Q4	us-gaap	Unbilled Contracts Receivable UnbilledContractsReceivable	44483000	USD
CY2013Q4	us-gaap	Unbilled Contracts Receivable UnbilledContractsReceivable	50286000	USD
CY2013Q4	us-gaap	Unrecorded Unconditional Purchase Obligation Balance On Fifth Anniversary UnrecordedUnconditionalPurchaseObligationBalanceOnFifthAnniversary	1770000	USD
CY2013Q4	us-gaap	Unrecorded Unconditional Purchase Obligation Balance On First Anniversary UnrecordedUnconditionalPurchaseObligationBalanceOnFirstAnniversary	6448000	USD
CY2013Q4	us-gaap	Unrecorded Unconditional Purchase Obligation Balance On Fourth Anniversary UnrecordedUnconditionalPurchaseObligationBalanceOnFourthAnniversary	1758000	USD
CY2013Q4	us-gaap	Unrecorded Unconditional Purchase Obligation Balance On Second Anniversary UnrecordedUnconditionalPurchaseObligationBalanceOnSecondAnniversary	7164000	USD
CY2013Q4	us-gaap	Unrecorded Unconditional Purchase Obligation Balance On Third Anniversary UnrecordedUnconditionalPurchaseObligationBalanceOnThirdAnniversary	5267000	USD
CY2013Q4	us-gaap	Unrecorded Unconditional Purchase Obligation Balance Sheet Amount UnrecordedUnconditionalPurchaseObligationBalanceSheetAmount	26751000	USD
CY2013Q4	us-gaap	Unrecorded Unconditional Purchase Obligation Due After Five Years UnrecordedUnconditionalPurchaseObligationDueAfterFiveYears	4344000	USD
CY2013	us-gaap	Use Of Estimates UseOfEstimates	<div style="font-family:Times New Roman;font-size:10pt;"><div style="line-height:120%;text-align:left;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;font-style:italic;">Use of Estimates</font></div><div style="line-height:120%;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;"><br clear="none"/></font></div><div style="line-height:120%;text-align:left;text-indent:48px;font-size:10pt;"><font style="font-family:inherit;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>
CY2012	us-gaap	Weighted Average Number Of Shares Outstanding Basic WeightedAverageNumberOfSharesOutstandingBasic	25007000	shares
CY2013	us-gaap	Weighted Average Number Of Shares Outstanding Basic WeightedAverageNumberOfSharesOutstandingBasic	24850000	shares
CY2011	us-gaap	Weighted Average Number Of Shares Outstanding Basic WeightedAverageNumberOfSharesOutstandingBasic	25405000	shares
CY2012Q4	us-gaap	Workers Compensation Liability Current WorkersCompensationLiabilityCurrent	49484000	USD
CY2013Q4	us-gaap	Workers Compensation Liability Current WorkersCompensationLiabilityCurrent	52930000	USD
CY2013Q4	us-gaap	Workers Compensation Liability Current And Noncurrent WorkersCompensationLiabilityCurrentAndNoncurrent	120833000	USD
CY2013Q4	nsp	Accrued Corporate Payroll And Commissions Earned AccruedCorporatePayrollAndCommissionsEarned	21611000	USD
CY2013	nsp	Accrued Corporate Payroll Commissions And Other Accrued Liabilities AccruedCorporatePayrollCommissionsAndOtherAccruedLiabilities	556000	USD
CY2012	nsp	Accrued Corporate Payroll Commissions And Other Accrued Liabilities AccruedCorporatePayrollCommissionsAndOtherAccruedLiabilities	2353000	USD
CY2011	nsp	Accrued Corporate Payroll Commissions And Other Accrued Liabilities AccruedCorporatePayrollCommissionsAndOtherAccruedLiabilities	-1871000	USD
CY2013Q4	nsp	Accrued Health Insurance Costs AccruedHealthInsuranceCosts	5103000	USD
CY2012Q4	nsp	Accrued Health Insurance Costs AccruedHealthInsuranceCosts	13942000	USD
CY2012Q4	nsp	Accrued Payroll Taxes And Other Payroll Deductions Current AccruedPayrollTaxesAndOtherPayrollDeductionsCurrent	178534000	USD
CY2013Q4	nsp	Accrued Payroll Taxes And Other Payroll Deductions Current AccruedPayrollTaxesAndOtherPayrollDeductionsCurrent	165604000	USD
CY2012Q4	nsp	Accrued Worksite Employee Payroll Costs AccruedWorksiteEmployeePayrollCosts	150070000	USD
CY2013Q4	nsp	Accrued Worksite Employee Payroll Costs AccruedWorksiteEmployeePayrollCosts	173801000	USD
CY2013	nsp	Additionalclaimfundspaidrelatedto Ace Program AdditionalclaimfundspaidrelatedtoACEProgram	5000000	USD
CY2012	nsp	Adjusted Weighted Average Common Shares Outstanding AdjustedWeightedAverageCommonSharesOutstanding	25067000	shares
CY2013	nsp	Adjusted Weighted Average Common Shares Outstanding AdjustedWeightedAverageCommonSharesOutstanding	24872000	shares
CY2011	nsp	Adjusted Weighted Average Common Shares Outstanding AdjustedWeightedAverageCommonSharesOutstanding	25497000	shares
CY2013Q4	nsp	Applicable Margin30 Day Libor ApplicableMargin30DayLibor	0.0200
CY2013Q4	nsp	Applicable Margin Federal Funds Rate ApplicableMarginFederalFundsRate	0.0050
CY2013Q4	nsp	Cash Equivalents And Marketable Securities At Carrying Value CashEquivalentsAndMarketableSecuritiesAtCarryingValue	281293000	USD
CY2012Q4	nsp	Cash Equivalents And Marketable Securities At Carrying Value CashEquivalentsAndMarketableSecuritiesAtCarryingValue	297991000	USD
CY2012Q4	nsp	Cash Held In Demand Accounts CashHeldInDemandAccounts	21732000	USD
CY2013Q4	nsp	Cash Held In Demand Accounts CashHeldInDemandAccounts	23054000	USD
CY2013	nsp	Common Stock Purchase Right Per Preferred Stock Share CommonStockPurchaseRightPerPreferredStockShare	1	shares
CY2013Q4	nsp	Computer Hardware And Software ComputerHardwareAndSoftware	85241000	USD
CY2012Q4	nsp	Computer Hardware And Software ComputerHardwareAndSoftware	81140000	USD
CY2012Q4	nsp	Decrease Increase In Accrued Workers Compensation Costs For Changes In Estimated Losses DecreaseIncreaseInAccruedWorkersCompensationCostsForChangesInEstimatedLosses	13100000	USD
CY2013Q4	nsp	Decrease Increase In Accrued Workers Compensation Costs For Changes In Estimated Losses DecreaseIncreaseInAccruedWorkersCompensationCostsForChangesInEstimatedLosses	9300000	USD
CY2012Q4	nsp	Deposits Health Insurance DepositsHealthInsurance	3000000	USD
CY2013Q4	nsp	Deposits Health Insurance DepositsHealthInsurance	3700000	USD
CY2013Q4	nsp	Deposits Workers Compensation DepositsWorkersCompensation	81878000	USD
CY2012Q4	nsp	Deposits Workers Compensation DepositsWorkersCompensation	64201000	USD
CY2011Q4	nsp	Fair Value Of Traded In Aircraft FairValueOfTradedInAircraft	4000000	USD
CY2013	nsp	Future Non Cancelable Purchase And Service Obligations Disclosure Threshold FutureNonCancelablePurchaseAndServiceObligationsDisclosureThreshold	greater than $100,000 and one year
CY2013Q4	nsp	Goodwill And Other Intangible Assets Net GoodwillAndOtherIntangibleAssetsNet	18434000	USD
CY2012Q4	nsp	Goodwill And Other Intangible Assets Net GoodwillAndOtherIntangibleAssetsNet	23775000	USD
CY2013	nsp	Gross Billings GrossBillings	13462000000	USD
CY2012	nsp	Gross Billings GrossBillings	12992000000	USD
CY2011	nsp	Gross Billings GrossBillings	11700000000	USD
CY2011	nsp	Impairmentcharges Impairmentcharges	0	USD
CY2012	nsp	Impairmentcharges Impairmentcharges	4191000	USD
CY2013	nsp	Impairmentcharges Impairmentcharges	6021000	USD
CY2012	nsp	Payroll Taxes Benefits And Workers Compensation Costs PayrollTaxesBenefitsAndWorkersCompensationCosts	1776603000	USD
CY2011	nsp	Payroll Taxes Benefits And Workers Compensation Costs PayrollTaxesBenefitsAndWorkersCompensationCosts	1624444000	USD
CY2013	nsp	Increase Decrease In Restricted Cash Net From Acquisitions IncreaseDecreaseInRestrictedCashNetFromAcquisitions	4779000	USD
CY2011	nsp	Increase Decrease In Restricted Cash Net From Acquisitions IncreaseDecreaseInRestrictedCashNetFromAcquisitions	3533000	USD
CY2012	nsp	Increase Decrease In Restricted Cash Net From Acquisitions IncreaseDecreaseInRestrictedCashNetFromAcquisitions	2412000	USD
CY2011	nsp	Incremental Shares From Assumed Conversions Of Common Stock Options IncrementalSharesFromAssumedConversionsOfCommonStockOptions	92000	shares
CY2013	nsp	Incremental Shares From Assumed Conversions Of Common Stock Options IncrementalSharesFromAssumedConversionsOfCommonStockOptions	22000	shares
CY2012	nsp	Incremental Shares From Assumed Conversions Of Common Stock Options IncrementalSharesFromAssumedConversionsOfCommonStockOptions	60000	shares
CY2013	nsp	Marketable Securities Proceeds From Dispositions MarketableSecuritiesProceedsFromDispositions	8026000	USD
CY2012	nsp	Marketable Securities Proceeds From Dispositions MarketableSecuritiesProceedsFromDispositions	35891000	USD
CY2011	nsp	Marketable Securities Proceeds From Dispositions MarketableSecuritiesProceedsFromDispositions	3907000	USD
CY2012Q4	nsp	Money Market Funds Overnight Holdings At Carrying Value MoneyMarketFundsOvernightHoldingsAtCarryingValue	255000000	USD
CY2013Q4	nsp	Money Market Funds Overnight Holdings At Carrying Value MoneyMarketFundsOvernightHoldingsAtCarryingValue	192040000	USD
CY2012	nsp	Net Income Loss Available To Common Shareholders Basic NetIncomeLossAvailableToCommonShareholdersBasic	39178000	USD
CY2013	nsp	Net Income Loss Available To Common Shareholders Basic NetIncomeLossAvailableToCommonShareholdersBasic	31116000	USD
CY2011	nsp	Net Income Loss Available To Common Shareholders Basic NetIncomeLossAvailableToCommonShareholdersBasic	29562000	USD
CY2013	nsp	Number Of Days In Advance Of Beginning Of Reporting Quarter Carrier Establishes Cash Funding Rates NumberOfDaysInAdvanceOfBeginningOfReportingQuarterCarrierEstablishesCashFundingRates	P90D
CY2013Q4	nsp	Number Of Stock Based Employee Compensation Plans NumberOfStockBasedEmployeeCompensationPlans	3
CY2013	nsp	Number Of Years Transition To Comprehensive Business Performance Solutions Provider NumberOfYearsTransitionToComprehensiveBusinessPerformanceSolutionsProvider	P27Y
CY2012	nsp	Payments To Acquire Assets And Businesses Gross Investing Activities PaymentsToAcquireAssetsAndBusinessesGrossInvestingActivities	2410000	USD
CY2013	nsp	Payments To Acquire Assets And Businesses Gross Investing Activities PaymentsToAcquireAssetsAndBusinessesGrossInvestingActivities	0	USD
CY2011	nsp	Payments To Acquire Assets And Businesses Gross Investing Activities PaymentsToAcquireAssetsAndBusinessesGrossInvestingActivities	14555000	USD
CY2013	nsp	Payroll Taxes Benefits And Workers Compensation Costs PayrollTaxesBenefitsAndWorkersCompensationCosts	1862861000	USD
CY2013Q4	nsp	Payroll Withholdings Included In Cash Balance PayrollWithholdingsIncludedInCashBalance	143000000	USD
CY2012Q4	nsp	Payroll Withholdings Included In Cash Balance PayrollWithholdingsIncludedInCashBalance	158200000	USD
CY2012	nsp	Percentage Of Revenues From Company California Markets PercentageOfRevenuesFromCompanyCaliforniaMarkets	0.17
CY2013	nsp	Percentage Of Revenues From Company California Markets PercentageOfRevenuesFromCompanyCaliforniaMarkets	0.17
CY2011	nsp	Percentage Of Revenues From Company California Markets PercentageOfRevenuesFromCompanyCaliforniaMarkets	0.16
CY2013	nsp	Percentage Of Revenues From Company Texas Markets PercentageOfRevenuesFromCompanyTexasMarkets	0.26
CY2012	nsp	Percentage Of Revenues From Company Texas Markets PercentageOfRevenuesFromCompanyTexasMarkets	0.26
CY2011	nsp	Percentage Of Revenues From Company Texas Markets PercentageOfRevenuesFromCompanyTexasMarkets	0.27
CY2013	nsp	Percentage Of Subsidiary Stock Securing Debt PercentageOfSubsidiaryStockSecuringDebt	0.65
CY2012	nsp	Percentageof Revenuefrom Company Other Markets PercentageofRevenuefromCompanyOtherMarkets	0.48
CY2013	nsp	Percentageof Revenuefrom Company Other Markets PercentageofRevenuefromCompanyOtherMarkets	0.47
CY2011	nsp	Percentageof Revenuefrom Company Other Markets PercentageofRevenuefromCompanyOtherMarkets	0.48
CY2013	nsp	Percentageofgrantsissuedtodirectorsthatarevestedforannualawardgrants. Percentageofgrantsissuedtodirectorsthatarevestedforannualawardgrants.	1.00
CY2013	nsp	Percentof Revenuefrom Company New York Markets PercentofRevenuefromCompanyNewYorkMarkets	0.10
CY2012	nsp	Percentof Revenuefrom Company New York Markets PercentofRevenuefromCompanyNewYorkMarkets	0.09
CY2011	nsp	Percentof Revenuefrom Company New York Markets PercentofRevenuefromCompanyNewYorkMarkets	0.09
CY2013Q4	nsp	Premiums Owed To United PremiumsOwedToUnited	2100000	USD
CY2013Q4	nsp	Prepaid Health Insurance PrepaidHealthInsurance	9000000	USD
CY2012Q4	nsp	Prepaid Health Insurance PrepaidHealthInsurance	9000000	USD
CY2013Q4	nsp	Prepaid Health Insurance Current PrepaidHealthInsuranceCurrent	4500000	USD
CY2013Q4	nsp	Prepaid Health Insurance Current And Noncurrent PrepaidHealthInsuranceCurrentAndNoncurrent	13500000	USD
CY2012Q3	nsp	Proceeds From Sales Tax Refunds ProceedsFromSalesTaxRefunds	2900000	USD
CY2013Q4	nsp	Required Deposit For Health Care Costs RequiredDepositForHealthCareCosts	3500000	USD
CY2013	nsp	Salaries Wages And Payroll Taxes SalariesWagesAndPayrollTaxes	181444000	USD
CY2011	nsp	Salaries Wages And Payroll Taxes SalariesWagesAndPayrollTaxes	155233000	USD
CY2012	nsp	Salaries Wages And Payroll Taxes SalariesWagesAndPayrollTaxes	168807000	USD
CY2013	nsp	Section199 Tax Benefitsfor Tax Years2009to2012 Section199TaxBenefitsforTaxYears2009to2012	2000000	USD
CY2013	nsp	Section199 Tax Benefitsforthe Tax Year2013 Section199TaxBenefitsfortheTaxYear2013	530000	USD
CY2013Q4	nsp	Software Development Costs SoftwareDevelopmentCosts	38522000	USD
CY2012Q4	nsp	Software Development Costs SoftwareDevelopmentCosts	35866000	USD
CY2013	nsp	Special Dividend SpecialDividend	25700000	USD
CY2013	nsp	Term Of Revolving Credit Facility TermOfRevolvingCreditFacility	P4Y
CY2013Q4	nsp	Texas Salesand Use Tax Assessment TexasSalesandUseTaxAssessment	933000	USD
CY2012Q4	nsp	Texas Salesand Use Tax Assessment TexasSalesandUseTaxAssessment	782000	USD
CY2013	nsp	Time Period Estimate Of Incurred Claim Costs To Be Paid Included In Long Term Liabilities TimePeriodEstimateOfIncurredClaimCostsToBePaidIncludedInLongTermLiabilities	Greater than 1 year
CY2013	nsp	Time Period Estimate Of Incurred Claim Costs To Be Paid Included In Short Term Liabilities TimePeriodEstimateOfIncurredClaimCostsToBePaidIncludedInShortTermLiabilities	P1Y
CY2013	nsp	Time Period Incurred Claims Expected To Be Paid Included In Deposits TimePeriodIncurredClaimsExpectedToBePaidIncludedInDeposits	Greater than 1 year
CY2013	nsp	Time Period Incurred Claims Expected To Be Paid Recorded As Restricted Cash TimePeriodIncurredClaimsExpectedToBePaidRecordedAsRestrictedCash	P1Y
CY2012Q4	nsp	Total Cash Cash Equivalents And Marketable Securities TotalCashCashEquivalentsAndMarketableSecurities	281448000	USD
CY2013Q4	nsp	Total Cash Cash Equivalents And Marketable Securities TotalCashCashEquivalentsAndMarketableSecurities	272095000	USD
CY2012	nsp	Treasury Stock Acquired TreasuryStockAcquired	13773000	USD
CY2011	nsp	Treasury Stock Acquired TreasuryStockAcquired	25079000	USD
CY2013	nsp	Treasury Stock Acquired TreasuryStockAcquired	17229000	USD
CY2013	nsp	Us Treasury Rates That Correspond With Weighted Average Estimated Claim Payout Period USTreasuryRatesThatCorrespondWithWeightedAverageEstimatedClaimPayoutPeriod	0.008
CY2012	nsp	Us Treasury Rates That Correspond With Weighted Average Estimated Claim Payout Period USTreasuryRatesThatCorrespondWithWeightedAverageEstimatedClaimPayoutPeriod	0.006
CY2012Q4	nsp	Unbilled Unbilled	181040000	USD
CY2013Q4	nsp	Unbilled Unbilled	199628000	USD
CY2012Q4	nsp	Unbilled Accrued Worksite Employee Payroll Costs UnbilledAccruedWorksiteEmployeePayrollCosts	150070000	USD
CY2013Q4	nsp	Unbilled Accrued Worksite Employee Payroll Costs UnbilledAccruedWorksiteEmployeePayrollCosts	173801000	USD
CY2013	nsp	Undiscounted Accrued Workers Compensation Costs UndiscountedAccruedWorkersCompensationCosts	131200000	USD
CY2012	nsp	Undiscounted Accrued Workers Compensation Costs UndiscountedAccruedWorkersCompensationCosts	123400000	USD
CY2003Q4	nsp	Unemployment Tax Reserve Account Assessment Relating To California Employees Including Penalties And Interest UnemploymentTaxReserveAccountAssessmentRelatingToCaliforniaEmployeesIncludingPenaltiesAndInterest	5600000	USD
CY2012Q4	nsp	Unemployment Tax Reserve Account Assessment Relating To California Employees Including Penalties And Interest UnemploymentTaxReserveAccountAssessmentRelatingToCaliforniaEmployeesIncludingPenaltiesAndInterest	8100000	USD
CY2013	nsp	Vesting Period For Officers And Other Management To Be Eligible For Restricted Stock Grants Maximum VestingPeriodForOfficersAndOtherManagementToBeEligibleForRestrictedStockGrantsMaximum	P5Y
CY2013	nsp	Vesting Period For Officers And Other Management To Be Eligible For Restricted Stock Grants Minimum VestingPeriodForOfficersAndOtherManagementToBeEligibleForRestrictedStockGrantsMinimum	P3Y
CY2013	nsp	Vestingperiodfor Initialgrantstomembersofthe Boardof Directors VestingperiodforInitialgrantstomembersoftheBoardofDirectors	P3Y
CY2012Q4	nsp	Workers Compensation Administrative Fees Accrued WorkersCompensationAdministrativeFeesAccrued	2300000	USD
CY2013Q4	nsp	Workers Compensation Administrative Fees Accrued WorkersCompensationAdministrativeFeesAccrued	1000000	USD
CY2012	nsp	Workers Compensation Claims Paid WorkersCompensationClaimsPaid	30010000	USD
CY2013	nsp	Workers Compensation Claims Paid WorkersCompensationClaimsPaid	32583000	USD
CY2013	nsp	Workers Compensation Discount Changed During Period WorkersCompensationDiscountChangedDuringPeriod	1169000	USD
CY2012	nsp	Workers Compensation Discount Changed During Period WorkersCompensationDiscountChangedDuringPeriod	868000	USD
CY2012	nsp	Workers Compensation Expense WorkersCompensationExpense	37772000	USD
CY2013	nsp	Workers Compensation Expense WorkersCompensationExpense	42900000	USD
CY2012Q4	nsp	Workers Compensation Liability Current Net WorkersCompensationLiabilityCurrentNet	47149000	USD
CY2013Q4	nsp	Workers Compensation Liability Current Net WorkersCompensationLiabilityCurrentNet	51928000	USD
CY2010Q4	nsp	Workers Compensation Maximum Aggregate Economic Burden For Claims In Excess Of First Layer Cap Per Policy Year WorkersCompensationMaximumAggregateEconomicBurdenForClaimsInExcessOfFirstLayerCapPerPolicyYear	5000000	USD
CY2010Q3	nsp	Workers Compensation Maximum Economic Burden First Layer Of Claims Per Occurrence WorkersCompensationMaximumEconomicBurdenFirstLayerOfClaimsPerOccurrence	1000000	USD
CY2010Q4	nsp	Workers Compensation Maximum Economic Burden First Layer Of Claims Per Occurrence WorkersCompensationMaximumEconomicBurdenFirstLayerOfClaimsPerOccurrence	1000000	USD
CY2013	nsp	Worksite Employee Payroll Cost WorksiteEmployeePayrollCost	11206000000	USD
CY2012	nsp	Worksite Employee Payroll Cost WorksiteEmployeePayrollCost	10833000000	USD
CY2011	nsp	Worksite Employee Payroll Cost WorksiteEmployeePayrollCost	9724000000	USD
CY2013	dei	Amendment Flag AmendmentFlag	false
CY2013	dei	Current Fiscal Year End Date CurrentFiscalYearEndDate	--12-31
CY2013	dei	Document Fiscal Period Focus DocumentFiscalPeriodFocus	FY
CY2013	dei	Document Fiscal Year Focus DocumentFiscalYearFocus	2013
CY2013	dei	Document Period End Date DocumentPeriodEndDate	2013-12-31
CY2013	dei	Document Type DocumentType	10-K
CY2013	dei	Entity Central Index Key EntityCentralIndexKey	0001000753
CY2014Q1	dei	Entity Common Stock Shares Outstanding EntityCommonStockSharesOutstanding	25504983	shares
CY2013	dei	Entity Current Reporting Status EntityCurrentReportingStatus	Yes
CY2013	dei	Entity Filer Category EntityFilerCategory	Large Accelerated Filer
CY2013Q2	dei	Entity Public Float EntityPublicFloat	688000000	USD
CY2013	dei	Entity Registrant Name EntityRegistrantName	INSPERITY, INC.
CY2013	dei	Entity Voluntary Filers EntityVoluntaryFilers	No
CY2013	dei	Entity Well Known Seasoned Issuer EntityWellKnownSeasonedIssuer	Yes

Files In Submission

Name	View Source	Status
0001000753-14-000008-index-headers.html	Edgar Link	pending
0001000753-14-000008-index.html	Edgar Link	pending
0001000753-14-000008.txt	Edgar Link	pending
0001000753-14-000008-xbrl.zip	Edgar Link	pending
document-12312013x10k.htm	Edgar Link	pending
FilingSummary.xml	Edgar Link	unprocessable
Financial_Report.xls	Edgar Link	pending
Financial_Report.xlsx	Edgar Link	pending
graph.jpg	Edgar Link	pending
nsp-20131231.xml	Edgar Link	completed
nsp-20131231.xsd	Edgar Link	pending
nsp-20131231_cal.xml	Edgar Link	unprocessable
nsp-20131231_def.xml	Edgar Link	unprocessable
nsp-20131231_lab.xml	Edgar Link	unprocessable
nsp-20131231_pre.xml	Edgar Link	unprocessable
nsp12312013-ex211xsubsidia.htm	Edgar Link	pending
nsp12312013-ex231xconsent.htm	Edgar Link	pending
nsp12312013-ex241xpoas.htm	Edgar Link	pending
nsp12312013-ex311.htm	Edgar Link	pending
nsp12312013-ex312.htm	Edgar Link	pending
nsp12312013-ex321.htm	Edgar Link	pending
nsp12312013-ex322.htm	Edgar Link	pending
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R9.htm	Edgar Link	pending
report.css	Edgar Link	pending
Show.js	Edgar Link	pending

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$NSP
INSPERITY, INC. Stock $nsp

2013 Q4 Form 10-K Financial Statement

#000100075314000008 Filed on February 10, 2014

Income Statement

Balance Sheet

Cashflow Statement

Facts In Submission

Files In Submission

$NSP INSPERITY, INC. Stock $nsp

2013 Q4 Form 10-K Financial Statement

#000100075314000008 Filed on February 10, 2014

Income Statement

Balance Sheet

Cashflow Statement

Facts In Submission

Files In Submission

$NSP
INSPERITY, INC. Stock $nsp