Schedule - Summary of Changes in Total Real Estate and Accumulated Depreciation (Detail) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2014
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation Disclosure [Abstract]
Schedule III, Real Estate Accumulated Depreciation, Held For Sale			$ 26,574	$ 0	$ 0
SEC Schedule III, Real Estate, Gross, Held for Sale			70,808	22,307	0
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate [Roll Forward]
Balance, beginning of year	$ 3,299,702	$ 3,300,014	3,367,889
Improvements and development	125,616	502,077	116,575
Acquisitions	21,250	2,613	27,234
Impairment of assets	(201,818)	(89,101)	(74,391)
Dispositions	(4,856)	(402,783)	(61,360)
Write-off of fully depreciated assets	(32,993)	(13,118)	(5,125)
Reclassification to held for sale	(22,307)	0		(22,307)	0	$ (70,808)
Balance, end of year	3,184,594	3,299,702	3,300,014
Balance, end of year – held for sale	(22,307)	0
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate, Accumulated Depreciation [Roll Forward]
Balance, beginning of year	1,111,007	1,060,845	1,015,647
Depreciation expense	120,718	118,485	124,433
Impairment of assets	(75,586)	(39,264)	(35,998)
Dispositions	(4,564)	(15,941)	(11,538)
Write-off of fully depreciated assets	(32,993)	(13,118)	(5,125)
Reclassification to held for sale				0	0	(26,574)
Balance, end of year	$ 1,118,582	$ 1,111,007	$ 1,060,845
Balance, end of year – held for sale				$ 0	$ 0	$ (26,574)