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Income Taxes (Details 1) (USD $) In Thousands, unless otherwise specified	Dec. 31, 2011	Dec. 31, 2010
Current:
Income tax asset Current, Total	$ 47,233	$ 3,050
Deferred:
Income tax asset Deferred, Total	800	52,559
Income tax asset, Total	48,033	55,609
Federal [Member]
Current:
Income tax asset Current, Total	25,999	1,897
Deferred:
Income tax asset Deferred, Total	1,661	38,556
State [Member]
Current:
Income tax asset Current, Total	21,234	1,153
Deferred:
Income tax asset Deferred, Total	$ (861)	$ 14,003

For entities that net deferred tax assets and tax liabilities, represents the unclassified net amount of deferred tax assets and liabilities as of the balance sheet date, which result from applying the applicable enacted tax rate to net temporary differences and carryforwards pertaining to assets or liabilities. A temporary difference is a difference between the tax basis of an asset or liability and its carrying amount in the financial statements prepared in accordance with generally accepted accounting principles that will reverse in ensuing periods.

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