Long-Term Debt and Credit Facility (Details) (USD $) In Thousands, unless otherwise specified	Jun. 30, 2014	Dec. 31, 2013
Long-term debt:
Long-term debt	$ 56,909	$ 62,105
Less amount reported as current	(24,939)	(26,415)
Long-term debt, less current portion	31,970	35,690
Term loan [Member]
Long-term debt:
Long-term debt	39,113	45,833
Revolving Credit Facility [Member]
Long-term debt:
Long-term debt	$ 17,796	$ 16,272