Nature of Business and Financial Statement Presentation - Non-cash Investing and Financing Activities (Detail) - USD ($) $ in Thousands	6 Months Ended
	Jun. 30, 2019	Jun. 30, 2018	Dec. 31, 2018
Other Significant Noncash Transactions [Line Items]
Dividends declared, but not paid	$ 44,641	$ 78,700	$ 45,262
Accounts payable related to construction in progress	14,300	16,700
Receivable and reduction of real estate assets, net - related to hurricane	0	7,800
Conversion of Operating Partnership Units	0	900
Building [Member]
Other Significant Noncash Transactions [Line Items]
Assumption of building due to ground lease termination	$ 0	$ 2,200