Quarterly report pursuant to Section 13 or 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
3 Months Ended 9 Months Ended
Sep. 30, 2017
Sep. 30, 2017
Redeemable Noncontrolling Interest [Line Items]    
Income Attributed to Noncontrolling Interests $ (2,683) $ (6,157)
Redemption Value Adjustment   (23,044)
Redeemable noncontrolling interests as of September 30, 2017 209,070 209,070
Redeemable Noncontrolling Interests [Member]    
Redeemable Noncontrolling Interest [Line Items]    
Balance  
Redeemable Noncontrolling Interests Issued   202,013
Issuance Costs   (11,027)
Net   190,986
Income Attributed to Noncontrolling Interests   6,157
Distributions   (6,157)
Redemption Value Adjustment   18,084
Redeemable noncontrolling interests as of September 30, 2017 209,070 209,070
Redeemable Noncontrolling Interests [Member] | Series A And Series A-1 Preferred Units [Member]    
Redeemable Noncontrolling Interest [Line Items]    
Balance  
Redeemable Noncontrolling Interests Issued   52,013
Issuance Costs   (464)
Net   51,549
Income Attributed to Noncontrolling Interests   1,176
Distributions   (1,176)
Redemption Value Adjustment   775
Redeemable noncontrolling interests as of September 30, 2017 52,324 52,324
Redeemable Noncontrolling Interests [Member] | Rockpoint [Member]    
Redeemable Noncontrolling Interest [Line Items]    
Balance  
Redeemable Noncontrolling Interests Issued   150,000
Issuance Costs   (10,563)
Net   139,437
Income Attributed to Noncontrolling Interests   4,981
Distributions   (4,981)
Redemption Value Adjustment   17,309
Redeemable noncontrolling interests as of September 30, 2017 $ 156,746 $ 156,746