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Income Taxes (Schedule of Components of Income Tax Expense (Benefit)) (Details) (USD $)
In Thousands, unless otherwise specified
 3 Months Ended 12 Months Ended
Dec. 31, 2013
Sep. 30, 2013
Jun. 30, 2013
Mar. 31, 2013
Dec. 31, 2012
Sep. 30, 2012
Jun. 30, 2012
Mar. 31, 2012
Dec. 31, 2013
Dec. 31, 2012
Dec. 31, 2011
Income (loss) before income taxes:                      
Domestic                 $ (1,118) $ 3,411 $ 62,510
Foreign                 21,852 1,149 9,132
Income before income taxes                 20,734 4,560 71,642
Provision for income taxes:                      
State and foreign                 7,307 3,545 2,167
Total current provision                 7,307 3,545 2,167
Deferred:                      
Federal                   98 23,443
State and foreign                 (3,081) (2,831) 495
Total deferred provision (benefit)                 (3,081) (2,733) 23,938
Total provision for income taxes $ 1,066 $ 1,016 $ 1,125 $ 1,019 $ 95 $ 383 $ (884) $ 1,218 $ 4,226 $ 812 $ 26,105