Supplemental Disclosure of Statement of Cash Flow Information (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2016	Dec. 31, 2015	Dec. 31, 2014
Other Significant Noncash Transactions [Line Items]
Interest paid	$ 87,692	$ 88,725	$ 100,080
Income taxes paid, net	1,240	741	859
Interests Sold [Member]
Other Significant Noncash Transactions [Line Items]
Real estate non-recourse mortgage debt assumed	242,269	55,000	30,140
Conveyed Interest [Member]
Other Significant Noncash Transactions [Line Items]
Mortgage loans on real estate, foreclosures	21,582	47,528	9,900
LCIF [Member]
Other Significant Noncash Transactions [Line Items]
Interest paid	27,262	28,191	27,199
Income taxes paid, net	34	$ 60	$ 161
Mortgage loan related to property sales	$ 242,269