Investments In Joint Ventures (Aggregate Balance Sheet And Statement Of Income Data For Unconsolidated Joint Ventures) (Details) - USD ($) $ in Thousands		12 Months Ended
		Dec. 31, 2016	Dec. 31, 2015	Dec. 31, 2014
Schedule of Equity Method Investments [Line Items]
Total assets		$ 726,900	$ 748,000
Total third party debt		518,700	527,000
Total equity		184,000	195,300
Total revenues		119,800	114,500	$ 105,600
Gain On Sale Of Joint Venture Operating Property Net Of Tax		0	0	18,500
Net income		14,800	12,000	26,900
Equity in income of joint ventures	[1]	$ 7,125	$ 6,168	$ 7,023

[1] Equity in income excludes our ownership interest of fee income from various services provided by us to the Funds.