Derivative Instruments - Narrative (Detail) - USD ($) $ in Thousands	3 Months Ended		12 Months Ended
	Mar. 31, 2020	Mar. 31, 2019	Dec. 31, 2019
Derivative Instruments, Gain (Loss) [Line Items]
Realized gains (losses) on terminations of interest rate swaps	$ 463,966	$ 108,046
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	$ 4,100,000	$ 1,500,000