Long-Term Debt (Details) - USD ($) $ in Thousands	9 Months Ended
	Sep. 30, 2015	Dec. 31, 2014
Long-term debt obligation
Total debt	$ 75,906	$ 82,687
Less current maturities	75,906	18,375
Total long-term debt	0	64,312
2013 Revolving Credit Facility, due August 16, 2016
Long-term debt obligation
Long-term Line of Credit	$ 7,000	0
Basis of interest rate	Eurodollar rate
Remaining borrowing capacity	$ 66,800
Effective rate of interest (as a percent)	2.44%
2011 Term Loan Facility, due August 16, 2016
Long-term debt obligation
Total debt	$ 68,906	$ 82,687
Basis of interest rate	LIBOR
Effective rate of interest (as a percent)	2.19%