Accumulated Other Comprehensive Loss - Summary of Accumulated Other Comprehensive Loss (Detail) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2018	Sep. 30, 2017	Sep. 30, 2018	Sep. 30, 2017
AOCI Including Portion Attributable to Noncontrolling Interest, Net of Tax [Roll Forward]
Beginning balance			$ 2,348,142	$ 1,878,744
Other comprehensive income (loss) before reclassifications			6,833	22,027
Amounts reclassified from accumulated other comprehensive loss due to de-designation of interest rate swaps	$ 0	$ 2,207	(1,529)	2,207
Amounts reclassified from accumulated other comprehensive loss			6,967	13,494
Total other comprehensive income, net of tax	21,088	22,516	12,271	37,728
Ending balance	2,184,572	2,148,844	2,184,572	2,148,844
Foreign Currency [Member]
AOCI Including Portion Attributable to Noncontrolling Interest, Net of Tax [Roll Forward]
Beginning balance			(28,187)	(43,500)
Other comprehensive income (loss) before reclassifications			(19,547)	17,979
Amounts reclassified from accumulated other comprehensive loss due to de-designation of interest rate swaps			0	0
Amounts reclassified from accumulated other comprehensive loss			0	0
Total other comprehensive income, net of tax			(19,547)	17,979
Ending balance	(47,734)	(25,521)	(47,734)	(25,521)
Effective Portion of Change in Fair Value of Derivatives [Member]
AOCI Including Portion Attributable to Noncontrolling Interest, Net of Tax [Roll Forward]
Beginning balance			(4,347)	(12,751)
Other comprehensive income (loss) before reclassifications			20,888	(2,498)
Amounts reclassified from accumulated other comprehensive loss due to de-designation of interest rate swaps			(1,529)	2,207
Amounts reclassified from accumulated other comprehensive loss			3,437	7,023
Total other comprehensive income, net of tax			22,796	6,732
Ending balance	18,449	(6,019)	18,449	(6,019)
Proportionate Share of Equity Investee's OCI [Member]
AOCI Including Portion Attributable to Noncontrolling Interest, Net of Tax [Roll Forward]
Beginning balance			7,315	(6,498)
Other comprehensive income (loss) before reclassifications			5,492	6,546
Amounts reclassified from accumulated other comprehensive loss due to de-designation of interest rate swaps			0	0
Amounts reclassified from accumulated other comprehensive loss			3,530	6,471
Total other comprehensive income, net of tax			9,022	13,017
Ending balance	16,337	6,519	16,337	6,519
AOCI [Member]
AOCI Including Portion Attributable to Noncontrolling Interest, Net of Tax [Roll Forward]
Beginning balance			(25,219)	(62,749)
Ending balance	$ (12,948)	$ (25,021)	$ (12,948)	$ (25,021)