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Operating Segments (Reconciliation Of Reportable Segments Measure Of Profit Or Loss To Income) (Details) - USD ($)
$ in Thousands
 3 Months Ended 6 Months Ended
Dec. 31, 2016
Dec. 31, 2015
Dec. 31, 2016
Dec. 31, 2015
Segment Reporting, Reconciling Item for Operating Profit (Loss) from Segment to Consolidated [Line Items]        
Operating Income (Loss) $ 25,589 $ 24,779 $ 57,770 $ 55,994
Interest income 5,061 3,664 9,365 7,939
Interest expense (510) (1,054) (1,306) (2,028)
Income before income taxes 30,140 27,389 65,829 61,905
Reportable Segment [Member]        
Segment Reporting, Reconciling Item for Operating Profit (Loss) from Segment to Consolidated [Line Items]        
Operating Income (Loss) 33,383 29,839 67,931 66,447
Corporate/Eliminations [Member]        
Segment Reporting, Reconciling Item for Operating Profit (Loss) from Segment to Consolidated [Line Items]        
Operating Income (Loss) $ (7,794) $ (5,060) $ (10,161) $ (10,453)