Derivative Instruments - Narrative (Detail) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended		12 Months Ended
	Jun. 30, 2020	Jun. 30, 2019	Jun. 30, 2020	Jun. 30, 2019	Dec. 31, 2019
Derivative Instruments, Gain (Loss) [Line Items]
Realized gains (losses) on terminations of interest rate swaps	$ 0	$ 95,211	$ 463,966	$ 203,257
The weighted average pay rate on the Company's interest rate swaps					2.62%
The weighted average receive rate on the Company's interest rate swaps					1.94%
The weighted average maturity on the Company's interest rate swaps					6 years
Interest Rate Swaps
Derivative Instruments, Gain (Loss) [Line Items]
Derivative, notional amount of derivative terminated		$ 1,300,000	$ 4,100,000	$ 2,800,000