Line of Credit and Long-Term Debt - Components of Debt (Details) - USD ($) $ in Thousands	Sep. 30, 2017	Dec. 31, 2016
Long-term debt consists of:
Total short-term and long-term debt	$ 87,967	$ 81,567
Less: line-of-credit and current maturities of long-term debt	(21,016)	(11,553)
Less: deferred loan costs	(145)	(161)
Long-term debt, less current portion	66,806	69,853
Revolving line of credit
Long-term debt consists of:
Total short-term and long-term debt	17,000	7,700
Notes payable
Long-term debt consists of:
Total short-term and long-term debt	70,679	73,400
Other borrowings
Long-term debt consists of:
Total short-term and long-term debt	$ 288	$ 467