Annual report pursuant to Section 13 and 15(d)

Income Taxes (Reconciliation Of Statutory Federal Income Tax Amount) (Details)

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Income Taxes (Reconciliation Of Statutory Federal Income Tax Amount) (Details) (USD $)
3 Months Ended 12 Months Ended
Dec. 31, 2011
Jun. 30, 2011
Jun. 30, 2010
Dec. 31, 2011
Dec. 31, 2010
Dec. 31, 2009
Income Taxes [Abstract]            
Income before federal income taxes       $ 108,332,000 $ 47,403,000 $ 23,655,000
Expected income tax at statutory rate       37,916,000 16,591,000 8,279,000
State income taxes       4,227,000 2,378,000 1,370,000
Other differences       (146,000) (111,000) (891,000)
Changes in valuation allowance       (42,087,000) (18,818,000) (8,730,000)
Total income tax expense (benefit) provision $ (91,000) $ 1,000 $ 40,000 $ (90,000) $ 40,000 $ 28,000