Changes In Accumulated Depreciation (Detail) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013
Reconciliation of real estate accumulated depreciation [Roll Forward]
Accumulated Depreciation, Beginning Balance	$ 1,169,492	$ 1,058,540	$ 948,581
Depreciation on real estate assets and rental homes	113,609	111,065	108,229
Amortization of in-place leases	2,358	3,999	1,940
Amortization of Intangible Assets for Continuing Operations			1,940
Dispositions and other	(3,036)	(4,112)	(210)
Accumulated Depreciation, Ending Balance	1,282,423	1,169,492	1,058,540
Rental Home Depreciation Expense	$ 10,700	$ 10,900	$ 6,500