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Income Taxes (Schedule of Effective Income Tax Rate Reconciliation) (Details)	12 Months Ended
	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012
Income Tax Disclosure [Abstract]
Federal tax expense at statutory rate	34.00%us-gaap_EffectiveIncomeTaxRateReconciliationAtFederalStatutoryIncomeTaxRate	34.00%us-gaap_EffectiveIncomeTaxRateReconciliationAtFederalStatutoryIncomeTaxRate	34.00%us-gaap_EffectiveIncomeTaxRateReconciliationAtFederalStatutoryIncomeTaxRate
State income tax expense (net of federal income tax benefit)	5.00%us-gaap_EffectiveIncomeTaxRateReconciliationStateAndLocalIncomeTaxes	4.00%us-gaap_EffectiveIncomeTaxRateReconciliationStateAndLocalIncomeTaxes	4.00%us-gaap_EffectiveIncomeTaxRateReconciliationStateAndLocalIncomeTaxes
Permanent differences associated with general business credits	(1.00%)us-gaap_EffectiveIncomeTaxRateReconciliationTaxCreditsResearch	5.00%us-gaap_EffectiveIncomeTaxRateReconciliationTaxCreditsResearch	0.00%us-gaap_EffectiveIncomeTaxRateReconciliationTaxCreditsResearch
Permanent differences associated with stock options	0.00%us-gaap_EffectiveIncomeTaxRateReconciliationNondeductibleExpenseShareBasedCompensationCost	0.00%us-gaap_EffectiveIncomeTaxRateReconciliationNondeductibleExpenseShareBasedCompensationCost	(5.00%)us-gaap_EffectiveIncomeTaxRateReconciliationNondeductibleExpenseShareBasedCompensationCost
Other permanent differences	1.00%us-gaap_EffectiveIncomeTaxRateReconciliationNondeductibleExpenseOther	0.00%us-gaap_EffectiveIncomeTaxRateReconciliationNondeductibleExpenseOther	3.00%us-gaap_EffectiveIncomeTaxRateReconciliationNondeductibleExpenseOther
Other	(2.00%)us-gaap_EffectiveIncomeTaxRateReconciliationOtherAdjustments	(1.00%)us-gaap_EffectiveIncomeTaxRateReconciliationOtherAdjustments	0.00%us-gaap_EffectiveIncomeTaxRateReconciliationOtherAdjustments
Net income tax expense	37.00%us-gaap_EffectiveIncomeTaxRateContinuingOperations	42.00%us-gaap_EffectiveIncomeTaxRateContinuingOperations	36.00%us-gaap_EffectiveIncomeTaxRateContinuingOperations

X

- Definition

Percentage of current income tax expense (benefit) and deferred income tax expense (benefit) pertaining to continuing operations.

+ References

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-Publisher FASB

-Name Accounting Standards Codification

-Topic 740

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-Topic 235

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Percentage of domestic federal statutory tax rate applicable to pretax income (loss).

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