Interest-Bearing Deposits - Additional Information (Detail) - USD ($)	Jun. 30, 2018	Jun. 30, 2017
Banking and Thrift [Abstract]
Interest-bearing deposits in denominations of $100,000 or more	$ 218,149,000	$ 181,146,000

Amount of time deposit liabilities, including certificates of deposit, in denominations of $100,000 or more.

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher SEC
-Name Industry Guide
-Number 3
-Section V
-Paragraph D-E