Segments - Schedule of Revenues and Long-Lived Assets by Geographical Area (Detail) - USD ($) $ in Thousands	3 Months Ended								12 Months Ended
	Dec. 31, 2017	Sep. 30, 2017	Jun. 30, 2017	Mar. 31, 2017	Dec. 31, 2016	Sep. 30, 2016	Jun. 30, 2016	Mar. 31, 2016	Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2015
Segment Reporting Information [Line Items]
Revenues, net	$ 609,991	$ 577,877	$ 541,237	$ 520,433	$ 514,953	$ 484,426	$ 417,905	$ 414,262	$ 2,249,538	$ 1,831,546	$ 1,702,865
Long-lived assets (excluding goodwill):	3,020,209				2,867,689				3,020,209	2,867,689	2,322,580
United States (country of domicile)
Segment Reporting Information [Line Items]
Revenues, net									1,400,801	1,278,828	1,231,641
Long-lived assets (excluding goodwill):	1,808,043				1,664,224				1,808,043	1,664,224
Brazil
Segment Reporting Information [Line Items]
Revenues, net									394,550	167,769	85,124
Long-lived assets (excluding goodwill):	688,809				784,816				688,809	784,816
United Kingdom
Segment Reporting Information [Line Items]
Revenues, net									236,550	229,125	$ 248,598
Long-lived assets (excluding goodwill):	$ 294,039				$ 286,928				$ 294,039	$ 286,928