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Income Taxes - Unrecognized Tax Benefits (Details) - USD ($)
$ in Thousands
12 Months Ended
Jun. 30, 2015
Jun. 30, 2014
Jun. 30, 2013
Reconciliation of Unrecognized Tax Benefits, Excluding Amounts Pertaining to Examined Tax Returns [Roll Forward]      
Beginning balance $ 9,615 $ 8,089 $ 8,025
Increases resulting from current year's tax positions 3,855 3,120 2,044
Increases resulting from prior years' tax positions 793 132 490
Decrease resulting from settlements and releases due to the lapse of statutes of limitations (971) (1,726) (2,470)
Decreases resulting from prior years' tax positions 0 0 0
Ending balance $ 13,292 $ 9,615 $ 8,089