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Income Taxes (Reconciliation Of Statutory Federal Income Tax Amount) (Details) (USD $)
In Thousands, unless otherwise specified |
3 Months Ended | 12 Months Ended | ||||||||||
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Mar. 31, 2013
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Dec. 31, 2012
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Sep. 30, 2012
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Jun. 30, 2012
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Mar. 31, 2012
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Dec. 31, 2011
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Sep. 30, 2011
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Jun. 30, 2011
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Mar. 31, 2011
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Dec. 31, 2012
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Dec. 31, 2011
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Dec. 31, 2010
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| Income Tax Disclosure [Abstract] | ||||||||||||
| Income before federal income taxes | $ 72,754 | $ 26,869 | $ 98,199 | $ 108,332 | $ 47,403 | |||||||
| Expected income tax at statutory rate | 34,370 | 37,916 | 16,591 | |||||||||
| State income taxes | 1,493 | 4,227 | 2,378 | |||||||||
| Other differences | 292 | (146) | (111) | |||||||||
| Changes in valuation allowance | (9,792) | (42,087) | (18,818) | |||||||||
| Total income tax expense (benefit) provision recorded for continuing operations | $ 28,195 | $ 10,849 | $ 15,514 | $ 0 | $ 0 | $ (91) | $ 0 | $ 1 | $ 0 | $ 26,363 | $ (90) | $ 40 |
| X | ||||||||||
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- Definition
This element represents the income or loss from continuing operations attributable to the economic entity which may also be defined as revenue less expenses from ongoing operations, after income or loss from equity method investments, but before income taxes, extraordinary items, and noncontrolling interest. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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- Details
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- Definition
The sum of the current income tax expense or benefit and the deferred income tax expense or benefit pertaining to continuing operations. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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- Definition
The portion of the difference between total income tax expense or benefit as reported in the Income Statement and the expected income tax expense or benefit computed by applying the domestic federal statutory income tax rates to pretax income from continuing operations attributable to changes in the valuation allowance for deferred tax assets in the period. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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- Definition
The amount of income tax expense or benefit for the period computed by applying the domestic federal statutory tax rates to pretax income from continuing operations. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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- Definition
The portion of the difference, between total income tax expense or benefit as reported in the Income Statement for the year/accounting period and the expected income tax expense or benefit computed by applying the domestic federal statutory income tax rates to pretax income from continuing operations, that is attributable to all other items not otherwise listed in the existing taxonomy. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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- Definition
The portion of the difference, between total income tax expense or benefit as reported in the Income Statement for the period and the expected income tax expense or benefit computed by applying the domestic federal statutory income tax rates to pretax income from continuing operations, that is attributable to state and local income tax expense or benefit. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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