Stock-Based Compensation - Changes in Stock Options (Details)	6 Months Ended
	Dec. 31, 2015 USD ($) $ / shares shares
Changes in stock options
Options outstanding, June 30, 2015 | shares	2,094,037
Options, Granted | shares	742,687
Options, Exercised | shares	(38,569)
Options, Lapsed and Forfeited | shares	(168,666)
Options outstanding, December 31, 2015 | shares	2,629,489
Options vested and expected to vest, December 31, 2015 | shares	2,537,759
Options exercisable, December 31, 2015 | shares	1,661,984
Weighted Average Exercise Price, Options outstanding, June 30, 2015 | $ / shares	$ 36.08
Weighted Average Exercise Price, Granted | $ / shares	30.04
Weighted Average Exercise Price, Exercised | $ / shares	25.02
Weighted Average Exercise Price, Lapsed and Forfeited | $ / shares	36.79
Weighted Average Exercise Price, Options outstanding, December 31, 2015 | $ / shares	34.49
Weighted Average Exercise Price, Option vested and expected to vest, December 31, 2015 | $ / shares	34.59
Weighted Average Exercise Price, Options exercisable, December 31, 2015 | $ / shares	$ 35.35
Weighted Average Remaining Life, Options outstanding, December 31, 2015	5 years 6 months
Weighted Average Remaining Life, Options vested and expected to vest, December 31, 2015	5 years 3 months 18 days
Weighted Average Remaining Life, Options exercisable, December 31, 2015	3 years 2 months 12 days
Aggregate Intrinsic value, Options outstanding, December 31, 2015 | $	$ 0
Aggregate Intrinsic Value, Options vested and expected to vest, December 31, 2015 | $	0
Aggregate Intrinsic Value, Options exercisable, December 31, 2015 | $	$ 0