Rental Properties Disposition (Details)	0 Months Ended		3 Months Ended		12 Months Ended			36 Months Ended	0 Months Ended		12 Months Ended
	Oct. 11, 2013 USD ($)	Dec. 06, 2012 USD ($)	Mar. 31, 2012 USD ($)	Dec. 31, 2011 USD ($)	Dec. 31, 2013 USD ($) properties	Dec. 31, 2012 USD ($) properties	Dec. 31, 2011 USD ($) properties	Jan. 01, 2014 properties	Mar. 29, 2011 Toronto Dundas Square Member CAD	Feb. 03, 2011 Toronto Dundas Square Member USD ($)	Dec. 31, 2013 Toronto Dundas Square Member CAD	Feb. 03, 2011 Toronto Dundas Square Member CAD
Significant Acquisitions and Disposals [Line Items]
Gross Sales Proceeds From Sale Of Real Estate									226,000,000
Net Sales Proceeds From Sale Of Real Estate									222,700,000
Escrow Deposits Related to Property Sales									15,300,000
Foreign Currency Fair Value Hedge Asset at Fair Value										201,500,000		200,000,000
Gains (Losses) on Sales of Investment Real Estate										18,300,000
Payments for (Proceeds from) Real Estate Held-for-investment											15,200,000
Real Estate Disposals Transaction Liability Balance											100,000
Gain on sale or acquisition, net			282,000	1,200,000	3,017,000	0	0
Gain (loss) on sale or acquisition of real estate					4,256,000	(27,000)	19,545,000
Real Estate Related Assets											300,000
Real Estate Related Liabilites											3,800,000
number of winery properties sold					5	2	3	6
Gain (Loss) on Sale of Property Plant Equipment					4,300,000	(308,000)	16,000
Proceeds from Sale of Property, Plant, and Equipment	$ 1,000,000.0	$ 10,000,000			$ 49,800,000	$ 44,400,000	$ 20,700,000
Noncash or Part Noncash Divestiture, Type of Consideration Received	2.5	2.5