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Basis Of Presentation And Summary Of Significant Accounting Policies (Impact Of Restatement On Statement Of Changes In Equity) (Details) - USD ($)
$ in Thousands
Mar. 31, 2020
Dec. 31, 2019
Jun. 30, 2019
Mar. 31, 2019
Dec. 31, 2018
Jun. 30, 2018
Error Corrections And Prior Period Adjustments Restatement [Line Items]            
As reported, beginning of period $ 259,042 $ 320,560 $ 319,429 [1],[2] $ 499,252 $ 650,904 $ 736,897
Accumulated Other Comprehensive Income [Member]            
Error Corrections And Prior Period Adjustments Restatement [Line Items]            
As reported, beginning of period $ (218,196) [3] (191,212) [3] (196,046) [3] $ (200,405) [2] $ (198,374) [2],[3] $ (184,538) [2],[3]
DNI Discontinued Operations Presentation [Member]            
Error Corrections And Prior Period Adjustments Restatement [Line Items]            
As reported, beginning of period   (194,439) (199,273)      
Correction of misstatement   3,227 3,227      
As restated, beginning of period   (191,212) (196,046)      
DNI Discontinued Operations Presentation [Member] | Scenario Previously Reported [Member]            
Error Corrections And Prior Period Adjustments Restatement [Line Items]            
As reported, beginning of period   523,979 528,576      
Correction of misstatement   (3,227) (3,227)      
As restated, beginning of period   $ 520,752 $ 525,349      
[1]
Derived from audited financial statements.
[2]
Refer to Note 1
[3]
Certain amounts have been restated to correct the misstatement discussed in Note 1.