Noncontrolling Interests In Subsidiaries (Changes In Noncontrolling Interests Of Subsidiaries) (Details)	9 Months Ended
	Sep. 30, 2018 shares
Noncontrolling Interests In Subsidiaries [Abstract]
Balance, Beginning, Common Units	10,438,855
Redemption of common units for shares of common stock	(252,070)
Issuance of units, Common Units
Balance, Ending, Common Units	10,186,785
Balance, Beginning, LTIP Units	1,230,877
Issuance of units, LTIP Units	864,024
Cancellation of units	(273,517)
Balance, Ending, LTIP Units	1,821,384