Income Taxes - Narrative (Details) (USD $)	3 Months Ended		9 Months Ended
	Sep. 30, 2013	Sep. 30, 2012	Sep. 30, 2013	Sep. 30, 2012
Operating Loss Carryforwards [Line Items]
Cost of Goods and Services Sold	$ 647,805,000	$ 563,348,000	$ 1,824,490,000	$ 1,546,325,000
Effective income tax rate continuing operations			31.50%	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	$ 5,200,000		$ 5,200,000