| **Income Taxes - Provision for Income Tax (Benefit) Expense (Details) (USD $)In Thousands, unless otherwise specified** | 12 Months Ended                                            |
|-------------------------------------------------------------------------------------------------------------------------|------------------------------------------------------------|
||
| **Current:**                                                                                                            |                                                       |   |   |
| Federal                                                                                                                 | $ 69,245us-gaap_CurrentFederalTaxExpenseBenefit            | $ 349us-gaap_CurrentFederalTaxExpenseBenefit | $ 34us-gaap_CurrentFederalTaxExpenseBenefit |
| State                                                                                                                   | 135us-gaap_CurrentStateAndLocalTaxExpenseBenefit           | 169us-gaap_CurrentStateAndLocalTaxExpenseBenefit | 118us-gaap_CurrentStateAndLocalTaxExpenseBenefit |
| Total                                                                                                                   | 69,380us-gaap_CurrentIncomeTaxExpenseBenefit               | 518us-gaap_CurrentIncomeTaxExpenseBenefit | 152us-gaap_CurrentIncomeTaxExpenseBenefit |
| **Deferred:**                                                                                                           |                                                       |   |   |
| Federal                                                                                                                 | 35,314us-gaap_DeferredFederalIncomeTaxExpenseBenefit       | (366)us-gaap_DeferredFederalIncomeTaxExpenseBenefit | 196us-gaap_DeferredFederalIncomeTaxExpenseBenefit |
| State                                                                                                                   | 10,813us-gaap_DeferredStateAndLocalIncomeTaxExpenseBenefit | (561)us-gaap_DeferredStateAndLocalIncomeTaxExpenseBenefit | 39us-gaap_DeferredStateAndLocalIncomeTaxExpenseBenefit |
| Total                                                                                                                   | 46,127us-gaap_DeferredIncomeTaxExpenseBenefit              | (927)us-gaap_DeferredIncomeTaxExpenseBenefit | 235us-gaap_DeferredIncomeTaxExpenseBenefit |
| Income tax expense (benefit)                                                                                            | $ 115,507us-gaap_IncomeTaxExpenseBenefit                   | $ (409)us-gaap_IncomeTaxExpenseBenefit | $ 387us-gaap_IncomeTaxExpenseBenefit |

| X                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                         |
|---------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------|
| - Definition
Amount of current federal tax expense (benefit) pertaining to income (loss) from continuing operations.
+ References
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|-----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------|
| - Definition
Amount of current income tax expense (benefit) pertaining to taxable income (loss) from continuing operations.
+ References
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|-------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------|
| - Definition
Amount of current state and local tax expense (benefit) pertaining to income (loss) from continuing operations.
+ References
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|---------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------|
| - Definition
Amount of deferred federal income tax expense (benefit) pertaining to income (loss) from continuing operations.
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Amount of deferred income tax expense (benefit) pertaining to income (loss) from continuing operations.
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|----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------|
| - Definition
Amount of deferred state and local tax expense (benefit) pertaining to income (loss) from continuing operations.
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| - Definition
Amount of current income tax expense (benefit) and deferred income tax expense (benefit) pertaining to continuing operations.
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