Deposits - Certificates of Deposit By Maturity (Detail) - USD ($) $ in Thousands	Jun. 30, 2019	Jun. 30, 2018
Deposits [Abstract]
One year or less	$ 1,486,448	$ 1,123,977
After one year to two years	513,532	493,166
After two years to three years	101,377	199,289
After three years to four years	69,381	101,276
After four years to five years	26,633	81,355
After five years	7,086	17,575
Total certificates of deposit	$ 2,204,457	$ 2,016,638