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Income Taxes (Computation Of Income Tax (Benefit) Expense By Applying U.S. Federal Statutory Tax Rate To Income (Loss) Before Taxes) (Details) (USD $)
In Thousands, unless otherwise specified
12 Months Ended
Dec. 31, 2011
Dec. 31, 2010
Dec. 31, 2009
Income Taxes [Abstract]      
Income tax expense (benefit) at the statutory rate of 35.0% for 2011 and 2010 and 34.0% for 2009 $ 19,940 $ 8,397 $ 3,405
Provision to return and deferred tax adjustments (190) (3,548)  
Change in federal and state effective tax rates (780) (225)  
State tax, net of federal benefit 2,418 1,565 938
Permanent adjustments 341 (83) 180
Uncertain tax position - non-deductible interest of foreign subsidiary     688
Impact of foreign rate differential 139 454 160
Impact of U.K. Restructuring (37,019)    
Foreign subsidiary change in statutory rate 524    
Other 256 (75) (132)
Subtotal (14,371) 6,485 5,239
Change in valuation allowance 1,195 (23,624) (994)
Total $ (13,176) $ (17,139) $ 4,245
Statutory rate 35.00% 35.00% 34.00%