Stock-Based Compensation (Details 1) (USD $) In Thousands, except Share data, unless otherwise specified	3 Months Ended
	Sep. 30, 2013	Jun. 30, 2012
Changes in stock options
Options outstanding, June 30, 2012		2,729,068
Options, Granted	342,662
Options, Exercised	(338,072)
Options, Lapsed and Forfeited	0
Options outstanding, March 31, 2013	2,733,658	2,729,068
Options vested and expected to vest, March 31, 2013	2,682,865
Options exercisable, March 31, 2013	1,860,371
Weighted Average Exercise Price, Options outstanding, June 30, 2012		$ 30.40
Weighted Average Exercise Price, Granted	$ 45.24
Weighted Average Exercise Price, Exercised	$ 25.85
Weighted Average Exercise Price, Lapsed and Forfeited	$ 0.00
Weighted Average Exercise Price, Options outstanding, March 31, 2013	$ 32.83	$ 30.40
Weighted Average Exercise Price, Option vested and expected to vest, March 31, 2013	$ 32.68
Weighted Average Exercise Price, Options exercisable, March 31, 2013	$ 29.76
Weighted Average Remaining Life, Options outstanding, March 31, 2013	6 years 1 month 6 days
Weighted Average Remaining Life, Options vested and expected to vest, March 31, 2013	6 years
Weighted Average Remaining Life, Options exercisable, March 31, 2013	4 years 9 months 18 days
Aggregate Intrinsic value, Options outstanding, March 31, 2013	$ 35
Aggregate Intrinsic Value, Options vested and expected to vest, March 31, 2013	35
Aggregate Intrinsic Value, Options exercisable, March 31, 2013	$ 29