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Fair Value Measurements - Financial Assets and Liabilities Measured at Fair Value on Recurring Basis (Detail) - USD ($)
$ in Thousands
Jun. 30, 2020
Dec. 31, 2019
Assets:    
Publicly traded equity securities $ 5,927 $ 2,779
Derivative instruments 99,376 57,707
Total financial assets 2,716,067 954,616
Liabilities:    
Derivative instruments 81,845 35,612
Money market and deposit accounts    
Assets:    
Cash and cash equivalents 2,594,622 886,547
Certificates of deposit    
Assets:    
Cash and cash equivalents 16,142 7,583
Level 1    
Assets:    
Publicly traded equity securities 5,927 2,779
Derivative instruments 0 0
Total financial assets 2,600,549 889,326
Liabilities:    
Derivative instruments 0 0
Level 1 | Money market and deposit accounts    
Assets:    
Cash and cash equivalents 2,594,622 886,547
Level 1 | Certificates of deposit    
Assets:    
Cash and cash equivalents 0 0
Level 2    
Assets:    
Publicly traded equity securities 0 0
Derivative instruments 99,376 57,707
Total financial assets 115,518 65,290
Liabilities:    
Derivative instruments 81,845 35,612
Level 2 | Money market and deposit accounts    
Assets:    
Cash and cash equivalents 0 0
Level 2 | Certificates of deposit    
Assets:    
Cash and cash equivalents $ 16,142 $ 7,583