Income Taxes (Details) - Components Of The Provision For Income Taxes (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
Current                      
Federal                 $ (17,145) $ (17,525) $ (5,603)
State                 (1,188) (643) (421)
Foreign                 (8,220) (3,737) (4,576)
Total current provision for income taxes                 (26,553) (21,905) (10,600)
Deferred                      
Federal                 2,920 (450) (6,555)
State                 121 (757) 930
Total deferred provision for income taxes                 3,041 (1,207) (5,625)
Total provision for income taxes $ (3,951) $ (4,863) $ (6,291) $ (8,407) $ (5,982) $ (4,392) $ (8,053) $ (4,685) $ (23,512) $ (23,112) $ (16,225)