Quarterly report pursuant to Section 13 or 15(d)

Noncontrolling Interests In Subsidiaries (Changes In Noncontrolling Interests Of Subsidiaries) (Details)

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Noncontrolling Interests In Subsidiaries (Changes In Noncontrolling Interests Of Subsidiaries) (Details) - shares
 3 Months Ended 9 Months Ended
Sep. 30, 2020
Sep. 30, 2019
Sep. 30, 2020
Sep. 30, 2019
Noncontrolling Interests In Subsidiaries [Abstract]        
Balance, Beginning, Common Units/Vested LTIP Units 9,586,528 9,976,344 9,612,064 10,229,349
Redemption of common units for shares of common stock (2,225)     (38,011)
Redemption of common units   (3,000) (99,952) (304,638)
Conversion of vested LTIP units to common units     6,655 18,438
Vested LTIP units 86,030   153,792 68,206
Cancellation of units     (1)  
Balance, Ending, Common Units/Vested LTIP Units 9,672,558 9,973,344 9,672,558 9,973,344
Balance, Beginning, Unvested LTIP Units 2,659,518 1,826,331 1,826,331 1,707,106
Issuance of units, LTIP Units     1,287,568 565,623
Vested LTIP units (88,255)   (160,447) (86,644)
Cancellation of units (833,198)   (1,215,387) (359,754)
Balance, Ending, Unvested LTIP Units 1,738,065 1,826,331 1,738,065 1,826,331