Annual report pursuant to Section 13 and 15(d)

Redeemable Noncontrolling Interests (Schedule Of Changes In The Value Of The Redeemable Noncontrolling Interests) (Details)

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Redeemable Noncontrolling Interests (Schedule Of Changes In The Value Of The Redeemable Noncontrolling Interests) (Details) - USD ($)
12 Months Ended
Dec. 31, 2021
Dec. 31, 2020
Dec. 31, 2019
Redeemable Noncontrolling Interest [Line Items]      
Balance $ 513,297,000    
Income Attributed to Noncontrolling Interests (25,977,000) $ (25,883,000) $ (22,615,000)
Redemption Value Adjustment (33,993,000) (38,951,000) (51,355,000)
Balance 521,313,000 513,297,000  
Redeemable Noncontrolling Interests [Member]      
Redeemable Noncontrolling Interest [Line Items]      
Balance 513,297,000 503,382,000  
Net 513,297,000 503,382,000  
Income Attributed to Noncontrolling Interests 25,977,000 25,883,000  
Distributions (25,977,000) (25,883,000)  
Redemption Value Adjustment 8,016,000 13,068,000  
Balance 521,313,000 513,297,000 503,382,000
Redeemable Noncontrolling Interests [Member] | Series A And Series A-1 Preferred Units In MCRLP [Member]      
Redeemable Noncontrolling Interest [Line Items]      
Balance 52,324,000 52,324,000  
Net 52,324,000 52,324,000  
Income Attributed to Noncontrolling Interests 1,820,000 1,820,000  
Distributions (1,820,000) (1,820,000)  
Balance 52,324,000 52,324,000 52,324,000
Redeemable Noncontrolling Interests [Member] | Rockpoint [Member]      
Redeemable Noncontrolling Interest [Line Items]      
Balance 460,973,000 451,058,000  
Net 460,973,000 451,058,000  
Income Attributed to Noncontrolling Interests 24,157,000 24,063,000  
Distributions (24,157,000) (24,063,000)  
Redemption Value Adjustment 8,016,000 13,068,000  
Balance $ 468,989,000 $ 460,973,000 $ 451,058,000