Nature of Business and Financial Statement Presentation - Non-cash Investing and Financing Activities (Detail) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2021	Mar. 31, 2020	Dec. 31, 2020
Other Significant Noncash Transactions [Line Items]
Dividends declared, but not paid	$ 28,263	$ 44,000	$ 14,844
Accounts payable related to construction in progress	5,700	7,700
Tax receivable	4,100	0
Building [Member]
Other Significant Noncash Transactions [Line Items]
Assumption of buildings due to ground lease terminations	$ 0	$ 3,000