|
Summary of Significant Accounting Policies - Reconciliation between U.S. Statutory Federal Income Tax Rate and Effective Income Tax Rate (Detail)
|
12 Months Ended | ||
|---|---|---|---|
|
Dec. 31, 2014
|
Dec. 31, 2013
|
Dec. 31, 2012
|
|
| Accounting Policies [Abstract] | |||
| U.S. statutory federal income tax rate | 0.00%us-gaap_EffectiveIncomeTaxRateReconciliationAtFederalStatutoryIncomeTaxRate | 0.00%us-gaap_EffectiveIncomeTaxRateReconciliationAtFederalStatutoryIncomeTaxRate | 34.00%us-gaap_EffectiveIncomeTaxRateReconciliationAtFederalStatutoryIncomeTaxRate |
| State taxes, net of U.S. federal income tax benefit | 26.90%us-gaap_EffectiveIncomeTaxRateReconciliationStateAndLocalIncomeTaxes | 41.70%us-gaap_EffectiveIncomeTaxRateReconciliationStateAndLocalIncomeTaxes | 4.00%us-gaap_EffectiveIncomeTaxRateReconciliationStateAndLocalIncomeTaxes |
| Other adjustments | 0.00%us-gaap_EffectiveIncomeTaxRateReconciliationOtherAdjustments | 473.40%us-gaap_EffectiveIncomeTaxRateReconciliationOtherAdjustments | (4.70%)us-gaap_EffectiveIncomeTaxRateReconciliationOtherAdjustments |
| Effective tax rate | 26.90%us-gaap_EffectiveIncomeTaxRateContinuingOperations | 515.10%us-gaap_EffectiveIncomeTaxRateContinuingOperations | 33.30%us-gaap_EffectiveIncomeTaxRateContinuingOperations |
| X | ||||||||||
|
- Details
|
| X | ||||||||||
|
- Definition
Percentage of current income tax expense (benefit) and deferred income tax expense (benefit) pertaining to continuing operations. Reference 1: http://www.xbrl.org/2003/role/presentationRef
|
| X | ||||||||||
|
- Definition
Percentage of domestic federal statutory tax rate applicable to pretax income (loss). Reference 1: http://www.xbrl.org/2003/role/presentationRef
|
| X | ||||||||||
|
- Definition
Percentage of the difference between reported income tax expense (benefit) and expected income tax expense (benefit) computed by applying the domestic federal statutory income tax rates to pretax income (loss) from continuing operations attributable to other adjustments. Reference 1: http://www.xbrl.org/2003/role/presentationRef
|
| X | ||||||||||
|
- Definition
Percentage of the difference between reported income tax expense (benefit) and expected income tax expense (benefit) computed by applying the domestic federal statutory income tax rates to pretax income (loss) from continuing operations applicable to state and local income tax expense (benefit), net of federal tax expense (benefit). Reference 1: http://www.xbrl.org/2003/role/presentationRef
|