Other Comprehensive Loss - Changes in Accumulated Other Comprehensive Loss by Component (Detail) $ in Thousands	6 Months Ended
	Jun. 30, 2020 USD ($)
Accumulated Other Comprehensive Income Loss [Line Items]
Beginning Balance	$ 1,981,478
Other comprehensive loss before reclassifications	(493)
Change in cash flow hedges reclassed to earnings	1,172
Net current-period other comprehensive income (loss)	679
Ending Balance	1,959,804
Gains and Losses on Cash Flow Hedges [Member]
Accumulated Other Comprehensive Income Loss [Line Items]
Beginning Balance	(1,172)
Other comprehensive loss before reclassifications	0
Change in cash flow hedges reclassed to earnings	1,172
Net current-period other comprehensive income (loss)	1,172
Ending Balance	0
Foreign Currency Items [Member]
Accumulated Other Comprehensive Income Loss [Line Items]
Beginning Balance	681
Other comprehensive loss before reclassifications	(493)
Change in cash flow hedges reclassed to earnings	0
Net current-period other comprehensive income (loss)	(493)
Ending Balance	188
Accumulated Other Comprehensive Loss [Member]
Accumulated Other Comprehensive Income Loss [Line Items]
Beginning Balance	(491)
Ending Balance	$ 188