Description of Business and Summary of Significant Accounting Policies - Cash Paid for Interest (Detail) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2016	Dec. 31, 2015	Dec. 31, 2014
Supplemental Cash Flow Information [Abstract]
Debt interest paid	$ 60,780	$ 53,978	$ 49,208
Capitalized interest	(1,721)	(169)	(52)
Cash paid for interest, net of capitalized interest	$ 59,059	$ 53,809	$ 49,156