Line of Credit and Long-Term Debt - Components of Debt (Details) - USD ($) $ in Thousands	Mar. 31, 2018	Dec. 31, 2017
Long-term debt consists of:
Total short-term and long-term debt	$ 68,973	$ 69,959
Less: line-of-credit and current maturities of long-term debt	(3,990)	(4,004)
Less: deferred loan costs	(134)	(139)
Long-term debt, less current portion	64,849	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	68,789	69,741
Other borrowings
Long-term debt consists of:
Total short-term and long-term debt	$ 184	$ 218