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Level 4 Debt (Details) (USD $)	3 Months Ended
	Mar. 31, 2013	Mar. 31, 2012	Dec. 31, 2012
Debt [Line Items]
Long-term debt	$ 250,000,000		$ 275,000,000
Interest paid	500,000	300,000
Asset-based revolving credit facility [Member]
Debt [Line Items]
Asset-based revolvoing credit facility	0		25,000,000
6.375% senior notes [Member]
Debt [Line Items]
6.375% senior notes, book value	$ 250,000,000		$ 250,000,000
Interest rate	6.375%

X

- Definition

Interest rate stated in the contractual debt agreement.

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- Definition

The amount of cash paid for interest during the period net of cash paid for interest that is capitalized.

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Amount borrowed under the credit facility as of the balance sheet date.

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Carrying amount of long-term debt, net of unamortized discount or premium, including current and noncurrent amounts. Includes, but not limited to, notes payable, bonds payable, debentures, mortgage loans and commercial paper. Excludes capital lease obligations.

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