Cash and Due From Banks (Details) - USD ($) $ in Millions	Dec. 31, 2019	Jun. 30, 2019
Cash and Due From Banks
Requirements for cash and reserve balances with Federal Reserve Bank deposits	$ 1.9	$ 1.5

Amount of pass-through reserves deposited with Federal Reserve Banks from member institutions of Federal Home Loan Banks (FHLBanks).

No definition available.

Name:	us-gaap_CashPassThroughReserveFederalHomeLoanBank
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant