Long-Term Debt (Details) (USD $)	6 Months Ended
	Jun. 30, 2014	Dec. 31, 2013
Long-term debt obligation
Total debt	$ 91,875,000	$ 98,000,000
Less current maturities	18,375,000	15,313,000
Total long-term debt	73,500,000	82,687,000
Revolving Credit Facility 2013 [Member]
Long-term debt obligation
Basis of interest rate	Eurodollar rate
Remaining borrowing capacity	72,500,000
Effective rate of interest (as a percent)	2.40%
Term Loan Facility 2011 [Member]
Long-term debt obligation
Basis of interest rate	LIBOR
Total debt	$ 91,875,000	$ 98,000,000
Effective rate of interest (as a percent)	2.15%