Equity Based Compensation Equity Based Compensation (Tables)

12 Months Ended

Jun. 30, 2017

Disclosure of Compensation Related Costs, Share-based Payments [Abstract]

Share-based Compensation Arrangement by Share-based Payment Award, Fair Value Assumptions and Methodology [Abstract]

The weighted average of assumptions used in estimating the fair value of stock options granted during each year were as follows:

	Year Ended June 30,
	2017	2016	2015
Expected volatility	25% - 27%	28% - 31%	32%
Expected life (in years)	6.25	6.25	6.25
Risk-free interest rates	1.2% - 1.3%	1.5% - 1.7%	2%
Dividend yield	None	None	None

Disclosure of Share-based Compensation Arrangements by Share-based Payment Award [Table Text Block]

The following table summarizes stock option activity and shares subject to outstanding options for the year ended June 30, 2017: 

			Time					Performance					Market
	Weighted				Weighted					Weighted					Weighted
	Average		Number		Average	Aggregate		Number		Average	Aggregate		Number		Average	Aggregate
	Exercise		of		Contractual	Intrinsic		of		Contractual	Intrinsic		of		Contractual	Intrinsic
	Price		shares		Term	Value		shares		Term	Value		shares		Term	Value
Outstanding as of June 30, 2016	$	17.26	1,824,855		6.75	$	8,841,470	796,518		6.46	$	4,323,349	1,785,700		5.07	$	15,130,345
Granted	$	24.42	515,671		—	—		—		—	—		—		—	—
Exercised	$	13.56	(448,477	)	—	6,707,436		(135,766	)	—	1,884,507		(344,101	)	—	6,291,098
Forfeited	$	16.46	(64,400	)	—	—		(37,030	)	—	—		(1,101,531	)	—	—
Expired / Canceled	$	18.78	(6,033	)	—	—		—		—	—		—		—	—
Outstanding as of June 30, 2017	$	20.15	1,821,616		7.13	23,380,986		623,722		5.72	10,587,364		340,068		3.21	7,661,773
Vest and expected to vest as of June 30, 2017	$	20.37	1,821,616		7.13	23,380,986		268,584		5.40	4,709,332		340,068		3.21	7,661,773
Vested and exercisable as of June 30, 2017	$	16.84	723,637		5.60	$	11,895,684	268,584		5.40	$	4,709,332	340,068		3.21	$	7,661,773

Schedule of Nonvested Restricted Stock Units Activity [Table Text Block]

The following table summarizes activity in unvested time-based restricted stock units for the year ended June 30, 2017:

	Time-Based Units	Weighted Average Grant-Date Fair Value
Unvested as of June 30, 2016	504,096	$	25.96
Granted	549,271	25.08
Vested	35,878	30.57
Forfeited	102,578	25.18
Unvested as of June 30, 2017	914,911	$	25.34

Schedule of Nonvested Performance-based Units Activity [Table Text Block]

The following table summarizes activity in unvested EPS performance share units for the year ended June 30, 2017:

	EPS Units	Weighted Average Grant-Date Fair Value
Unvested as of June 30, 2016	505,425	$	25.16
Granted	224,097	24.61
Vested	—	—
Forfeited	68,922	26.74
Unvested as of June 30, 2017	660,600	$	24.81

RTSR Performance Share Units

The fair value of the RTSR performance share units is determined using the Monte Carlo pricing model because the number of shares to be awarded is subject to a market condition. The Monte Carlo simulation is a generally accepted statistical technique used to simulate a range of possible future outcomes. Because the valuation model considers a range of possible outcomes, compensation cost is recognized regardless of whether the market condition is actually satisfied.

The assumptions used in estimating the fair value of the RTSR performance share units granted during each year were as follows:

	Year Ended June 30,
	2017	2016
Expected volatility	32 % - 35%	25%
Expected life (in years)	2.4 - 2.9	2.84
Risk-free interest rates	0.85% - 1.36%	0.94%
Dividend yield	None	None

The following table summarizes activity in unvested RTSR performance share units for the year ended June 30, 2017:

	RTSR Units	Weighted Average Grant-Date Fair Value
Unvested as of June 30, 2016	132,656	$	37.17
Granted	210,971	26.14
Vested	—	—
Forfeited	36,993	31.17
Unvested as of June 30, 2017	306,634	$	30.30