Stock-Based Compensation - Changes in Stock Options (Details)	3 Months Ended
	Sep. 30, 2017 USD ($) $ / shares shares
Changes in stock options
Options outstanding, June 30, 2017 | shares	1,726,791
Options, Granted | shares	0
Options, Exercised | shares	(1,628)
Options, Lapsed or Forfeited | shares	(60,849)
Options outstanding, September 30, 2017 | shares	1,664,314
Options vested and expected to vest, September 30, 2017 | shares	1,654,835
Options exercisable, September 30, 2017 | shares	1,383,912
Weighted Average Exercise Price, Options outstanding, June 30, 2017 | $ / shares	$ 34.08
Weighted Average Exercise Price, Granted | $ / shares	0.00
Weighted Average Exercise Price, Exercised | $ / shares	26.99
Weighted Average Exercise Price, Lapsed or Forfeited | $ / shares	39.40
Weighted Average Exercise Price, Options outstanding, September 30, 2017 | $ / shares	33.89
Weighted Average Exercise Price, Option vested and expected to vest, September 30, 2017 | $ / shares	33.92
Weighted Average Exercise Price, Options exercisable, September 30, 2017 | $ / shares	$ 35.47
Weighted Average Remaining Life, Options outstanding, September 30, 2017	4 years 6 months 6 days
Weighted Average Remaining Life, Options vested and expected to vest, September 30, 2017	4 years 6 months 6 days
Weighted Average Remaining Life, Options exercisable, September 30, 2017	3 years 9 months 9 days
Aggregate Intrinsic value, Options outstanding, September 30, 2017 | $	$ 12,406,000
Aggregate Intrinsic Value, Options vested and expected to vest, September 30, 2017 | $	12,291,000
Aggregate Intrinsic Value, Options exercisable, September 30, 2017 | $	$ 8,380,000