Long-Term Debt (Details) (USD $) In Thousands, unless otherwise specified	Jun. 30, 2014	Dec. 31, 2013
Total debt
Long-term debt	$ 46,078	$ 46,078
Amounts payable within one year	5,000	1,078
Long-term debt, noncurrent	41,078	45,000
Term loan [Member]
Total debt
Long-term debt	30,000	30,000
Revolving credit facility [Member]
Total debt
Long-term debt	15,000	15,000
Secured debt of affiliate [Member]
Total debt
Long-term debt	$ 1,078	$ 1,078