Schedule III-Real Estate And Accumulated Depreciation Transactions in Real Estate and Accumulated Depreciation (Detail) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2016		Dec. 31, 2015	Dec. 31, 2014
Real Estate And Accumulated Depreciation Disclosure [Abstract]
Real Estate gross carrying value, Beginning Balance	$ 2,588,903		$ 1,721,429	$ 859,877
Acquisitions	23,425		802,456	822,305
Improvements	97,767		65,018	39,247
Dispositions	(18,021)
Real Estate gross carrying value, Ending Balance	2,692,074	[1]	2,588,903	1,721,429
Real Estate accumulated depreciation, Beginning Balance	(90,201)		(40,467)	(11,011)
Depreciation	(63,745)		(49,734)	(29,456)
Accumulated depreciation on dispositions	822
Real Estate accumulated depreciation, Ending Balance	$ (153,124)		$ (90,201)	$ (40,467)

[1] The aggregate cost for federal income tax purposes is approximately $3.0 billion.