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Long-Term Debt and Credit Facility (Details) (USD $) In Thousands, unless otherwise specified	Mar. 31, 2015	Dec. 31, 2014
Long-term debt:
Total long-term debt	$ 48,030us-gaap_LongTermDebt	$ 44,041us-gaap_LongTermDebt
Less current portion of long-term debt	(24,417)us-gaap_LongTermDebtCurrent	(18,643)us-gaap_LongTermDebtCurrent
Long-term debt, less current portion	23,613us-gaap_LongTermDebtNoncurrent	25,398us-gaap_LongTermDebtNoncurrent
Revolving Credit Facility [Member]
Long-term debt:
Total long-term debt	17,274	8,500
Term loan [Member]
Long-term debt:
Total long-term debt	$ 30,756	$ 35,541

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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