Disclosures about Fair Value of Assets and Liabilities - Reconciliation of Beginning and Ending Balances of Recurring Fair Value Measurements Recognized in Accompanying Balance Sheet (Detail) - Mortgage Servicing Rights [Member] $ in Thousands	9 Months Ended
	Mar. 31, 2017 USD ($)
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Beginning Balance	$ 440
Total realized and unrealized gains and losses included in net income	77
Servicing rights that result from asset transfers	170
Payments received and loans refinanced	(60)
Ending Balance	627
Total gains or losses for the period included in net income attributable to the change in unrealized gains or losses related to assets and liabilities still held at the reporting date	$ 77