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Income Taxes (Details) (USD $)
In Thousands, unless otherwise specified
12 Months Ended
Dec. 31, 2013
Dec. 31, 2012
Dec. 31, 2011
Current      
U.S. $ 59,583 $ 40,375 $ 61,279
State (1,530) 2,234 5,083
Foreign 3 33 15
Total current taxes 58,056 42,642 66,377
Deferred      
U.S. (1,692) 7,928 (2,296)
State (125) (5) (3)
Total deferred taxes (1,819) 7,923 (2,299)
Total income taxes $ 56,239 $ 50,565 $ 64,078