Long-Term Debt (Narrative) (Details) (USD $)	6 Months Ended
Long-Term Debt (Narrative) (Details) (USD $)	Jun. 30, 2011
Standby letters of credit	$ 13,862,000
Revolving credit facility, availability amount	107,717,000
Revolving credit facility description	Borrowings under the Senior Credit Agreement are secured by the trade receivables, inventory, personal property and equipment, and certain real property of the Company's significant domestic subsidiaries. The Senior Credit Agreement provides for a revolving credit facility and letters of credit in an aggregate amount that do not exceed the lesser of (i) $200 million or (ii) a borrowing base determined by reference to the trade receivables, inventories, and property, plant, and equipment of the Company's significant domestic subsidiaries. The revolving credit facility is committed through August 30, 2012. The Company expects to refinance the Senior Credit Agreement during the third quarter of 2011 to significantly extend the maturity date of the debt at competitive interest rates in the current capital market. Borrowings under the revolving credit facility bear interest at a variable rate based upon the London Interbank Offered Rate (LIBOR), with a LIBOR floor of 1.50%, plus 3.25% or, at the Company's option, an alternate base rate. The revolving credit facility also carries an annual facility fee of 0.50% on the entire facility, whether drawn or undrawn, and fees on outstanding letters of credit which are payable quarterly. On a trailing four-quarter basis, the Senior Credit Agreement includes a single financial covenant that requires the Company to maintain a minimum fixed charge coverage ratio of 1.25 to 1.00 at the end of each quarter. As of June 30, 2011, the Company was in compliance with this financial covenant. The Senior Credit Agreement contains other provisions and events of default that are customary for similar agreements and may limit the Company's ability to take various actions. The Company's significant domestic subsidiaries have guaranteed the obligations under the Senior Credit Agreement.
Revolving credit facility committed date	August 30, 2012
Revolving credit facility, annual facility fee	0.50%
Senior Subordinated 8% Notes, Due December 1, 2015 [Member]
Debt instrument, issuance date	December 8, 2005
Debt instrument, issued value	$ 204,000,000
Debt instrument, discount to yield percent	8.25%
Debt instrument, maturity date	December 1, 2015

When presenting a range of maturity dates, the latest date when the outstanding debt instruments are required to be repaid. May be presented in a variety of ways (for example: year only, month and year, day, month and year, and number of years).

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- Definition

Description of the terms of an arrangement in which loan proceeds can continuously be obtained following repayments, but the total amount borrowed cannot exceed a specified maximum amount. Terms typically include interest rate, collateral required, guarantees required, repayment requirements, and restrictions on use of assets and activities of the entity.

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