Schedule of Other Current Liabilities (Detail) - USD ($) $ in Thousands	Mar. 31, 2019	Dec. 31, 2018
Other Liabilities Current [Abstract]
Taxes payable	$ 13,947	$ 13,167
Lease liability - operating	658
Accrued property and liability losses	818	2,726
Other	4,692	5,199
Other current liabilities	$ 20,115	$ 21,092