Long-Term Debt and Credit Facility - Components of Long-term debt (Details) - USD ($) $ in Thousands	Sep. 30, 2016	Dec. 31, 2015
Long-term debt:
Long-term debt	$ 42,562	$ 50,546
Less current portion of long-term debt	(34,562)	(32,291)
Long-term debt, less current portion	8,000	18,255
Revolving Credit Facility
Long-term debt:
Long-term debt	32,562	25,148
Term loan
Long-term debt:
Long-term debt	$ 10,000	$ 25,398