Noncontrolling Interests (Effect Of Changes In Ownership Interest In Subsidiaries On Consolidated Equity)(Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2015	Sep. 30, 2014	Sep. 30, 2015	Sep. 30, 2014
Noncontrolling Interest [Abstract]
Net Income Adjusted for Noncontrolling Interests	$ 43,401	$ 100,329	$ 127,077	$ 199,028
Transfers from the noncontrolling interests:
Increase in equity for operating partnership units			111	0
Net increase in equity for the acquisition of noncontrolling interests			0	11,015
Change from net income adjusted for noncontrolling interests and transfers from the noncontrolling interests			$ 127,188	$ 210,043