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Long-Term Debt and Liquidity (Long-Term Debt and Liquidity) (Details) (USD $) In Thousands	Jun. 30, 2011	Dec. 31, 2010
Long-term debt	$ 348,730	$ 275,799
Revolving Facility	198,000	130,000
Senior Subordinated Notes [Member]
Long-term debt	148,338	143,404
Other Debt [Member]
Long-term debt	$ 2,392	$ 2,395

Including current and noncurrent portions, aggregate carrying amount of long-term borrowings as of the balance sheet date. May include notes payable, bonds payable, commercial loans, mortgage loans, convertible debt, subordinated debt and other types of debt, which had initial maturities beyond one year or beyond the normal operating cycle, if longer, and after deducting unamortized discount or premiums, if any.

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