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Long-Term Debt (Details) (USD $) In Thousands, unless otherwise specified	Dec. 31, 2014	Dec. 31, 2013
Total debt
Long-term debt	$ 36,078us-gaap_LongTermDebt	$ 46,078us-gaap_LongTermDebt
Amounts payable within one year	0us-gaap_LongTermDebtCurrent	1,078us-gaap_LongTermDebtCurrent
Long-term debt, noncurrent	36,078us-gaap_LongTermDebtNoncurrent	45,000us-gaap_LongTermDebtNoncurrent
Term loan [Member]
Total debt
Long-term debt	30,000	30,000
Revolving credit facility [Member]
Total debt
Long-term debt	5,000	15,000
Secured debt of affiliate [Member]
Total debt
Long-term debt	$ 1,078	$ 1,078

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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