Share-based Compensation - RSU & ESPP (Details) - USD ($) $ / shares in Units, shares in Thousands, $ in Thousands	12 Months Ended			36 Months Ended
	Jun. 30, 2016	Jun. 30, 2015	Jun. 30, 2014	Jun. 30, 2016
Employee Stock Purchase Plan
Company's common stock authorized for issuance under the ESPP (in shares)	4,500			4,500
Restricted stock
Stock Options and Restricted Stock
Annual forfeiture rate used to calculate compensation expense (as a percent)				6.50%
Awards
Nonvested at the beginning of the period (in shares)	98	16
Granted (in shares)	147	103	269
Vested (in shares)	(66)	(14)	(252)
Forfeited (in shares)	(12)	(7)	(1)
Nonvested at the end of the period (in shares)	167	98	16	167
Weighted Average Grant-date Fair Value
Nonvested at the beginning of the period (in dollars per share)	$ 37.83	$ 34.01
Granted (in dollars per share)	54.64	37.97	$ 24.07
Vested (in dollars per share)	47.11	36.06	23.45
Forfeited (in dollars per share)	47.67	36.59	24.48
Nonvested at the end of the period (in dollars per share)	$ 48.22	$ 37.83	$ 34.01	$ 48.22
Aggregate Intrinsic Value
Vested	$ 3,511	$ 664	$ 10,440
Employee stock purchase plan
Employee Stock Purchase Plan
Purchase price lower of the fair market value of the common stock on the first day of the calendar quarter or the last day of the calendar quarter (as a percent)	85.00%
Percentage of the compensation authorized by the employee to be withheld	10.00%			10.00%
Company's common stock authorized for issuance under the ESPP (in shares)	1,100			1,100
Shares issued under the ESPP (in shares)	47	12
Cumulative shares issued under the ESPP (in shares)	485