Short-term and long-term debt (Detail) - USD ($) $ in Thousands		Mar. 31, 2018	Dec. 31, 2017
Short-term debt:
- Revolving credit line and other debt		$ 52,098	$ 65,152
- Long-term debt: current		1,050	1,050
Subtotal		53,148	66,202
Long-term debt:
- Term Loan Facility		103,688	103,950
- Vehicle and equipment loans		22	39
- Capital lease obligations		16	20
- Less: deferred financing costs on term loan		(2,730)	(2,851)
Subtotal		100,996	101,158
Total short-term & long-term debt	[1]	$ 154,144	$ 167,360

[1] Long-term debt is net of deferred financing costs.