Disclosures about Fair Value of Assets - Reconciliation of Beginning and Ending Balances of Recurring Fair Value Measurements Recognized in Accompanying Balance Sheet (Detail) - Mortgage Servicing Rights [Member] $ in Thousands	3 Months Ended
	Sep. 30, 2016 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	1
Servicing rights that result from asset transfers	96
Payments received and loans refinanced	(19)
Ending Balance	518
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	$ 1