Changes in Accumulated Other Comprehensive Income (AOCI) by Component - Amounts Reclassified from Accumulated Other Comprehensive Income (Detail) - USD ($) $ in Thousands	12 Months Ended
	Jun. 30, 2015	Jun. 30, 2014
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]
Tax expense	$ (1,835)	$ (1,862)
Net Income	3,274	3,477
Amounts Reclassified from AOCI [Member]
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]
Total reclassified amount before tax	(231)	(183)
Tax expense	93	74
Net Income	(138)	(109)
Unrealized Gains (Losses) on Available-for-Sale Securities [Member] | Amounts Reclassified from AOCI [Member]
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]
Net realized gains on sale of available-for-sale securities	(24)	(123)
Amortization of Defined Benefit Pension Items [Member] | Amounts Reclassified from AOCI [Member]
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]
Transition obligation	24	32
Actuarial losses	(183)	(44)
Prior service costs	$ (48)	$ (48)