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Employee Benefit Plans (Employer Contributions) (Details) - USD ($)
$ in Thousands
12 Months Ended
Jun. 30, 2015
Jun. 30, 2014
Jun. 30, 2013
Employer contributions $ 5,976 $ 5,760 $ 6,010
Matching Contributions [Member]      
Employer contributions 626 553 509
Discretionary Contributions [Member]      
Employer contributions $ 5,350 $ 5,207 $ 5,501