Derivative Instruments and Hedging Activities - Offsetting Derivatives (Detail) - USD ($) $ in Thousands	Dec. 31, 2020	Jun. 30, 2020
Derivative [Line Items]
Gross Amount Recognized, Assets	$ 1,003	$ 592
Gross Amounts Offset, Assets	(787)	(357)
Net Amounts Presented, Assets	216	235
Net Amount, Assets	216	235
Gross Amount Recognized, Liabilities	13,080	18,534
Gross Amounts Offset, Liabilities	(787)	(357)
Net Amounts Presented, Liabilities	12,293	18,177
Gross Amounts Not Offset, Cash Collateral Posted, Liabilities	(12,293)	(18,177)
Interest Rate Contract [Member]
Derivative [Line Items]
Gross Amount Recognized, Assets	1,003	592
Gross Amounts Offset, Assets	(787)	(357)
Net Amounts Presented, Assets	216	235
Net Amount, Assets	216	235
Gross Amount Recognized, Liabilities	13,080	18,534
Gross Amounts Offset, Liabilities	(787)	(357)
Net Amounts Presented, Liabilities	12,293	18,177
Gross Amounts Not Offset, Cash Collateral Posted, Liabilities	$ (12,293)	$ (18,177)