Debt - Schedule of Net Interest Expense (Detail) - USD ($) $ in Thousands	3 Months Ended								12 Months Ended
	Dec. 31, 2016	Sep. 30, 2016	Jun. 30, 2016	Mar. 31, 2016	Dec. 31, 2015	Sep. 30, 2015	Jun. 30, 2015	Mar. 31, 2015	Dec. 31, 2016	Dec. 31, 2015	Dec. 31, 2014
Interest Income Expense Net [Abstract]
Interest expense									$ 15,240	$ 15,488	$ 12,542
Interest income									(1,247)	(217)	(262)
Interest expense net of interest income									13,993	15,271	12,280
Capitalized interest									(788)	(738)	(839)
Interest expense, net	$ 3,350	$ 2,824	$ 3,417	$ 3,614	$ 3,773	$ 3,837	$ 2,869	$ 4,054	$ 13,205	$ 14,533	$ 11,441