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Income Taxes - Narrative (Details) (USD $)
3 Months Ended
Mar. 31, 2013
Mar. 31, 2012
Operating Loss Carryforwards [Line Items]    
Cost of Goods and Services Sold $ 558,177,000 $ 471,590,000
Effective income tax rate continuing operations 31.50%  
Federal statutory tax rate 35.00%  
Unrecognized Tax Benefits, Probability Threshold of Realizing for Tax Benefits Recognition, Minimum Percentage 50.00%  
Unrecognized Tax Benefits, Including Foreign Tax Credits and Penalties and Interest $ 6,600,000