Property Dispositions (Narratives) (Details) $ in Thousands		3 Months Ended
	Apr. 24, 2014 USD ($)	Mar. 31, 2016 USD ($) property	Mar. 31, 2015 USD ($)	Jun. 30, 2014 USD ($)	Dec. 31, 2014
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations
Gain on sale of real estate, net of tax		$ 25,398	$ 2,197
Non-recourse mortgage loans		69,200
Revenues		$ 107,226	98,750
Disposed of by Sale
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations
Number of properties sold | property		3
Proceeds from sales of property		$ 46,400
Gain on sale of real estate, net of tax		25,400
Non-recourse mortgage loans		15,000
Other expenses		2,400
Revenues		$ 900
Held-for-sale
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations
Number of properties held for sale, count | property		5
Contract selling price		$ 25,600
Ishops
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations
Gain on sale of real estate, net of tax	$ 14,600		$ 2,200	$ 12,400
Percentage of gain on sale recognized			15.00%	85.00%	85.00%
Deferred gain on the sale of property			$ 2,200