Stock-based Compensation (Details1) (USD $)	3 Months Ended
	Sep. 30, 2012
Balance, beginning	187,050
Granted
Exercised	(3,600)
Forfeited or expired
Outstanding, ending	183,450
Vested or expected to vest, end of period	175,509
Exercisable, end of period	125,000
Weight Average Exercise Price
Balance, beginning	$ 20.69
Granted
Exercised	$ 18.86
Forfeited or expired
Outstanding, ending	$ 20.72
Vested or expected to vest, end of period	$ 20.52
Exercisable, end of period	$ 18.65
Weighted Average Remaining Contractual Term
Balance, beginning	6 years 11 months
Outstanding, ending	6 years 9 months
Vested or expected to vest, end of period	6 years 7 months
Exercisable, end of period	5 years 6 months
Aggregate Intrinsic Value
Outstanding end of period	$ 1,027,076
Vested or expected to vest, end of period	1,017,710
Exercisable, end of period	$ 958,135