Short-term and long-term debt (Detail) - USD ($) $ in Thousands		Jun. 30, 2018	Dec. 31, 2017
Short-term debt:
- Revolving credit line and other debt		$ 55,082	$ 65,152
- Long-term debt: current		1,050	1,050
Subtotal		56,132	66,202
Long-term debt:
- Term Loan Facility		103,425	103,950
- Vehicle and equipment loans		12	39
- Capital lease obligations		12	20
- Less: deferred financing costs on term loan		(2,607)	(2,851)
Subtotal		100,842	101,158
Total short-term & long-term debt	[1]	$ 156,974	$ 167,360

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