Stockholders' Equity (Details)		9 Months Ended
	Mar. 21, 2015 item shares	Jun. 30, 2015 item $ / shares shares
RSUs
Stockholders' Equity
Number of units awarded (in shares)		303,104
Number of units awarded (in shares)		1,034,689
Number of shares of common stock that each award holder has the contingent right to receive	1
Awards vested (in shares)		160,499
Expected awards vested (in shares)		273,131
Vested awards to date		230,493
Number of Shares
Balance unvested at the beginning of the period (in shares)		642,949
Granted (in shares)		303,104
Vested (in shares)		(160,499)
Forfeited (in shares)		(43,341)
Balance unvested at the end of the period (in shares)		742,213
Weighted Average Grant-Date Fair Value
Balance unvested at the beginning of the period (in dollars per share) | $ / shares		$ 46.43
Granted (in dollars per share) | $ / shares		48.14
Vested (in dollars per share) | $ / shares		45.91
Forfeited (in dollars per share) | $ / shares		47.48
Balance unvested at the end of the period (in dollars per share) | $ / shares		$ 47.17
Time-based RSUs
Stockholders' Equity
Number of units awarded (in shares)		546,085
Number of equal installments for vesting of stock awards | item	4
Performance-based RSUs
Stockholders' Equity
Number of units awarded (in shares)		488,604
Vesting period		3 years
Number of vesting criteria's which has to be satisfied out of total vesting criteria's | item		1
Number of vesting criteria's | item		3