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Interest Expense (Details) (USD $) In Thousands, unless otherwise specified	3 Months Ended		9 Months Ended
	Sep. 30, 2014	Sep. 30, 2013	Sep. 30, 2014	Sep. 30, 2013
Interest and Debt Expense [Abstract]
Debt Instrument, Interest Rate, Stated Percentage		6.375%		6.375%
Interest incurred on debt	$ 5,448	$ 5,372	$ 16,115	$ 16,255
Amortization of discount on Senior Subordinated Notes	3,100	2,897	9,145	8,546
Amortization of debt issuance costs	521	729	1,916	1,872
Supply Chain Financing mark-up	0	100	47	380
Total interest expense	$ 9,069	$ 9,098	$ 27,223	$ 27,053
Effective interest rate, revolving credit facility			2.16%	2.42%
Senior Subordinated Notes implied rate			7.00%

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Supply Chain Financing Mark Up

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Amount of noncash expense included in interest expense to amortize debt discount and premium associated with the related debt instruments. Excludes amortization of financing costs. Alternate captions include noncash interest expense.

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Amount of noncash expense included in interest expense to issue debt and obtain financing associated with the related debt instruments. Alternate captions include noncash interest expense.

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Contractual interest rate for funds borrowed, under the debt agreement.

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Amount of the cost of borrowed funds accounted for as interest expense.

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Amount of the cost of borrowed funds accounted for as interest expense for debt.

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The effective interest rate during the reporting period.

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Stated interest rate of the subordinated debt.

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