Disclosures About Fair Value of Assets and Liabilities - Fair Value Measurement of Assets Recognized on Nonrecurring Basis (Detail) - USD ($) $ in Thousands	Mar. 31, 2016	Jun. 30, 2015	Mar. 31, 2015
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Impaired loans (collateral-dependent)	$ 5,281	$ 4,907	$ 5,102
Non-recurring [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Impaired loans (collateral-dependent)	126	63
Non-recurring [Member] | Significant Unobservable Inputs (Level 3) [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Impaired loans (collateral-dependent)	$ 126	$ 63