Other Comprehensive Income / (Loss) - Components of Other Comprehensive Income/(Loss) Include Changes in Fair Value of Available-for-Sale Securities (Detail) (USD $) In Thousands, unless otherwise specified	3 Months Ended
	Sep. 30, 2012	Sep. 30, 2011
Other Comprehensive Income [Line Items]
Net unrealized gains/(losses) on available-for-sale securities, Pre-tax Amount	$ 160	$ (735)
Reclassifications for net (gains)/ losses included in net income, Pre-tax Amount	(108)	151
Pre-tax, Total	52	(584)
Net unrealized gains/(losses) on available-for-sale securities, Tax (Expense)/Benefit	(70)	320
Reclassifications for net (gains)/ losses included in net income, Tax (Expense)/Benefit	47	(66)
Tax (Expense)/Benefit, Total	(23)	254
Net unrealized gains/(losses) on available-for-sale securities, Net-of-tax Amount	90	(415)
Reclassification for net (gains)/losses included in net income, Net-of-tax Amount	(61)	85
Net-of-tax Amount, Total	$ 29	$ (330)