Long-Term Debt and Credit Facility (Details) - USD ($) $ in Thousands	Sep. 30, 2015	Dec. 31, 2014
Long-term debt:
Long-term debt	$ 47,768	$ 44,041
Less amount reported as current	(27,727)	(18,643)
Long-term debt, less current portion	20,041	25,398
Revolving Credit Facility [Member]
Long-term debt:
Long-term debt	20,584	8,500
Term loan [Member]
Long-term debt:
Long-term debt	$ 27,184	$ 35,541