General - Schedule of Earnings (Loss) from Discontinued Operations (Detail) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2015	Jun. 30, 2014	Jun. 30, 2015	Jun. 30, 2014
Discontinued Operations and Disposal Groups [Abstract]
Revenues from rental properties	$ 60	$ 648	$ 175	$ 1,553
Impairment charges	(877)	(1,592)	(2,063)	(3,087)
Other operating (expenses) credit	646	(510)	550	(1,128)
Loss from operating activities	(171)	(1,454)	(1,338)	(2,662)
Gains on dispositions of real estate	32	1,217	124	4,370
(Loss) earnings from discontinued operations	$ (139)	$ (237)	$ (1,214)	$ 1,708