Employee Benefit Plans - Additional information (Detail) (USD $)	12 Months Ended		1 Months Ended
	Jun. 30, 2012 Year	Jun. 30, 2011	Jan. 01, 2004 First Contributions	Jan. 01, 2004 Next Contributions
Defined Contribution Plan Disclosure [Line Items]
Employer contribution plan of participant contribution			100.00%	50.00%
Participant's compensation contribution			3.00%	2.00%
Total contributions under profit sharing plan	$ 183,000
Premiums of health care benefits expensed	$ 843,000	$ 754,000
Years prior to retirement used to determine employee benefit under defined benefit pension plan	5
Weighted-average discount rate used in determining projected benefit obligations for defined benefit pension plan	5.50%	5.50%