Stock Options and Restricted Stock Awards (Details Textual) (USD $) In Thousands, except Share data, unless otherwise specified	12 Months Ended								0 Months Ended	1 Months Ended	0 Months Ended	1 Months Ended			1 Months Ended	12 Months Ended
	Jun. 30, 2014	Jun. 30, 2013	Jun. 30, 2012	Jun. 30, 2014 Restricted Stock Awards	Jun. 30, 2013 Restricted Stock Awards	Jun. 30, 2012 Restricted Stock Awards	Jun. 30, 2014 Restricted Stock Awards Minimum	Jun. 30, 2014 Restricted Stock Awards Maximum	Aug. 13, 2012 Performance Shares Executives Total Shareholder Return	Sep. 30, 2013 Performance Shares Executives Total Shareholder Return	Aug. 13, 2012 Performance Shares Executives Annual Revenue Growth	Sep. 30, 2013 Performance Shares Executives Annual Revenue Growth	Jun. 30, 1991 1991 Stock Option Plan	Jun. 30, 2003 2003 Stock Option Plan	Feb. 28, 2009 2007 Equity Incentive Plan	Jun. 30, 2007 2007 Equity Incentive Plan	Jun. 30, 2014 2007 Equity Incentive Plan
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Vested in Period, Fair Value				$ 8,252	$ 5,006	$ 3,625
Stock options and restricted stock awards (Textual) [Abstract]
Common stock approved													485,250	2,458,600	2,509,969	1,941,000
Expiration period of options or shares																10 years
Vesting period							1 year	3 years								3 years
Increase in number of shares															970,500
Percentage of common shares increased															5.00%
Increase in number of shares available for grant																	834,134
Percentage of outstanding shares																	2.70%
Vested options granted to employees after termination	90 days
Options granted	0	0	0
Aggregate intrinsic value for vested and outstanding options	19,377	19,842	1,624
Total aggregate intrinsic value of options exercised	16,848	1,712	770
Cash received from option exercises	7,664	5,691	2,845
Aggregate maximum number of shares granted				741,039	880,282	817,878			67,854	53,566	67,854	53,566
Forfeiture rate	17.50%	11.50%	11.60%
Total compensation cost for non-vested awards not yet recognized	$ 13,956
Weighted-average period of compensation cost	2 years 15 days
Maximum period for payment on Restricted stock unit following the six month anniversary date	30 days