Other Assets, Net - Components of Other Assets (Parenthetical) (Detail) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2018	Mar. 31, 2017	Dec. 31, 2017
Other Assets [Line Items]
Amortization expense	$ 11,900	$ 16,600
Prepaid tax assets expenses	4,000		$ 4,000
Mortgage indebtedness	1,505,235		$ 641,082
Interest Rate Cap [Member]
Other Assets [Line Items]
Fair value of interest rate cap	4,700
Mortgages indebtedness [Member]
Other Assets [Line Items]
Mortgage indebtedness	1,350,000
Mortgages indebtedness [Member] | Interest Rate Cap [Member]
Other Assets [Line Items]
Mortgage indebtedness	$ 1,350,000