Borrowings (Parentheticals) (Details)	Jun. 30, 2019	Jun. 30, 2018
FHLB variable rate advance (2.01%)
Federal Home Loan Bank, Advances [Line Items]
Federal Home Loan Bank, Interest rate		2.01%
FHLB fixed rate advance (2.04%, matured 7/2/18)
Federal Home Loan Bank, Advances [Line Items]
Federal Home Loan Bank, Interest rate		2.04%
FHLB fixed rate advance (2.03%, matured 7/3/18)
Federal Home Loan Bank, Advances [Line Items]
Federal Home Loan Bank, Interest rate		2.03%
FHLB fixed rate advance (2.03%, matured 7/5/18)
Federal Home Loan Bank, Advances [Line Items]
Federal Home Loan Bank, Interest rate		2.03%
FHLB fixed rate advance (1.92%, matured 7/10/18)
Federal Home Loan Bank, Advances [Line Items]
Federal Home Loan Bank, Interest rate		1.92%
FHLB fixed rate advance (1.73%, matured 7/11/18)
Federal Home Loan Bank, Advances [Line Items]
Federal Home Loan Bank, Interest rate		1.73%
FHLB fixed rate advance (1.78%, matured 7/23/18)
Federal Home Loan Bank, Advances [Line Items]
Federal Home Loan Bank, Interest rate		1.78%
FHLB fixed rate advance (1.80%, matured 7/30/18)
Federal Home Loan Bank, Advances [Line Items]
Federal Home Loan Bank, Interest rate		1.80%
FHLB fixed rate advance (2.07%, matured 8/9/18)
Federal Home Loan Bank, Advances [Line Items]
Federal Home Loan Bank, Interest rate		2.07%
FHLB fixed rate advance (2.09%, matured 8/13/18)
Federal Home Loan Bank, Advances [Line Items]
Federal Home Loan Bank, Interest rate		2.09%
FHLB fixed rate advance (2.12%, matured 9/17/18)
Federal Home Loan Bank, Advances [Line Items]
Federal Home Loan Bank, Interest rate		2.12%
FHLB fixed rate advance (2.12%, matured 9/19/18)
Federal Home Loan Bank, Advances [Line Items]
Federal Home Loan Bank, Interest rate		2.12%
FHLB fixed rate advance (2.15%, matured 10/15/18)
Federal Home Loan Bank, Advances [Line Items]
Federal Home Loan Bank, Interest rate		2.15%
FHLB fixed rate advance (2.22%, matured 11/13/18)
Federal Home Loan Bank, Advances [Line Items]
Federal Home Loan Bank, Interest rate		2.22%
FHLB fixed rate advance (2.22%, matured 11/14/18)
Federal Home Loan Bank, Advances [Line Items]
Federal Home Loan Bank, Interest rate		2.22%
FHLB fixed rate advance (2.45%, matures 7/1/19)
Federal Home Loan Bank, Advances [Line Items]
Federal Home Loan Bank, Interest rate	2.45%
FHLB fixed rate advance (2.43%, matures 7/2/19)
Federal Home Loan Bank, Advances [Line Items]
Federal Home Loan Bank, Interest rate	2.43%
FHLB fixed rate advance (2.45%, matures 7/3/19)
Federal Home Loan Bank, Advances [Line Items]
Federal Home Loan Bank, Interest rate	2.45%
FHLB fixed rate advance (2.43%, matures 7/3/19)
Federal Home Loan Bank, Advances [Line Items]
Federal Home Loan Bank, Interest rate	2.43%
FHLB fixed rate advance (2.649%, matures 7/23/19)
Federal Home Loan Bank, Advances [Line Items]
Federal Home Loan Bank, Interest rate	2.649%
FHLB fixed rate advance (2.649%, matures 7/24/19)
Federal Home Loan Bank, Advances [Line Items]
Federal Home Loan Bank, Interest rate	2.649%
FHLB fixed rate advance (2.647%, matures 7/25/19)
Federal Home Loan Bank, Advances [Line Items]
Federal Home Loan Bank, Interest rate	2.647%