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Income Taxes - Reconciliation (Details) (USD $)
In Thousands, unless otherwise specified
12 Months Ended
Dec. 31, 2012
Dec. 31, 2011
Dec. 31, 2010
Income Tax Disclosure [Abstract]      
Federal statutory tax rate 35.00% 35.00% 35.00%
Income tax reconciliation      
Tax expense (benefit) at federal statutory rate $ 9,563 $ 4,871 $ (22,239)
State taxes, net of federal benefit 1,263 1,067 (3,053)
Uncertain tax positions 742 2,198 1,207
Non-deductible goodwill and intangibles impairment (18) (18) 11,703
Acquisition-related costs 0 0 927
Other, net (540) 786 668
Income tax expense (benefit) from continuing operations $ 11,010 $ 8,904 $ (10,787)