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 ($)
$ in Thousands
12 Months Ended
Dec. 31, 2018
Dec. 31, 2017
Redeemable Noncontrolling Interest [Line Items]    
Balance January 1, 2018 $ 212,208  
Income Attributed to Noncontrolling Interests (13,979) $ (8,840)
Redemption Value Adjustment (26,700) (28,865)
Redeemable noncontrolling interests as of December 31, 2018 330,459 212,208
Redeemable Noncontrolling Interests [Member]    
Redeemable Noncontrolling Interest [Line Items]    
Balance January 1, 2018 212,208  
Redeemable Noncontrolling Interests Issued 105,000  
Net 317,208  
Income Attributed to Noncontrolling Interests 13,979  
Distributions (13,979)  
Redemption Value Adjustment 13,251  
Redeemable noncontrolling interests as of December 31, 2018 330,459 212,208
Redeemable Noncontrolling Interests [Member] | Series A And Series A-1 Preferred Units [Member]    
Redeemable Noncontrolling Interest [Line Items]    
Balance January 1, 2018 52,324  
Net 52,324  
Income Attributed to Noncontrolling Interests 1,820  
Distributions (1,820)  
Redeemable noncontrolling interests as of December 31, 2018 52,324 52,324
Redeemable Noncontrolling Interests [Member] | Rockpoint [Member]    
Redeemable Noncontrolling Interest [Line Items]    
Balance January 1, 2018 159,884  
Redeemable Noncontrolling Interests Issued 105,000  
Net 264,884  
Income Attributed to Noncontrolling Interests 12,159  
Distributions (12,159)  
Redemption Value Adjustment 13,251  
Redeemable noncontrolling interests as of December 31, 2018 $ 278,135 $ 159,884