Annual report pursuant to Section 13 and 15(d)

Real Estate Investments And Accumulated Depreciation (Schedule Of Changes In Rental Properties And Accumulated Depreciation) (Details)

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Real Estate Investments And Accumulated Depreciation (Schedule Of Changes In Rental Properties And Accumulated Depreciation) (Details) - USD ($)
$ in Thousands
 12 Months Ended
Dec. 31, 2021
Dec. 31, 2020
Dec. 31, 2019
Real Estate Investments And Accumulated Depreciation [Abstract]      
Rental Properties, Balance at beginning of year $ 4,638,643 $ 4,256,681 $ 5,306,017
Rental Properties, Additions 1,002,342 1,776,276 1,349,959
Rental Properties, Real estate held for sale (778,184) (944,082) (1,553,383)
Rental Properties, Properties sold (744,810) (443,755) (824,167)
Rental Properties, Impairments (27,547)    
Rental Properties, Retirements/disposals (13,578) (6,477) (21,745)
Rental Properties, Balance at end of year 4,076,866 4,638,643 4,256,681
Accumulated Depreciation, Balance at beginning of year 656,331 558,617 1,097,868
Accumulated Depreciation, Depreciation expense 102,062 104,421 156,250
Accumulated Depreciation, Real estate held for sale (159,541) 2,238 (411,833)
Accumulated Depreciation, Properties sold     (261,923)
Accumulated Depreciation, Impairments (1,858) (2,469)  
Accumulated Depreciation, Retirements/disposals (13,578) (6,477) (21,745)
Accumulated Depreciation, Balance at end of year $ 583,416 $ 656,331 $ 558,617