Line of Credit and Long-Term Debt - Components of Debt (Details) - USD ($) $ in Thousands	Jun. 30, 2018	Dec. 31, 2017
Long-term debt consists of:
Total short-term and long-term debt	$ 67,926	$ 69,959
Less: line-of-credit and current maturities of long-term debt	(4,103)	(4,004)
Less: deferred loan costs	(129)	(139)
Long-term debt, less current portion	63,694	65,816
Revolving line of credit
Long-term debt consists of:
Total short-term and long-term debt	0	0
Notes payable
Long-term debt consists of:
Total short-term and long-term debt	67,835	69,741
Other borrowings
Long-term debt consists of:
Total short-term and long-term debt	$ 91	$ 218