Securities, Securities in Continuous Unrealized Loss Position (Details) $ in Thousands	12 Months Ended
	Jun. 30, 2019 USD ($) Security	Jun. 30, 2018 USD ($) Security
Available-for-sale Securities, Continuous Unrealized Loss Position [Abstract]
Less than 12 months, fair value	$ 856	$ 16,110
Less than 12 months, unrealized losses	$ 20	$ 438
Less than 12 months, number of securities | Security	1	21
More than 12 months, fair value	$ 0	$ 254
More than 12 months, unrealized losses	$ 0	$ 2
More than 12 months, number of securities | Security	0	1
Total, fair value	$ 856	$ 16,364
Total, unrealized losses	$ 20	$ 440
Total, number of securities | Security	1	22
Held-to-maturity Securities, Continuous Unrealized Loss Position [Abstract]
Less than 12 months, fair value	$ 4,791	$ 139,440
Less than 12 months, unrealized losses	$ 23	$ 3,277
Less than 12 months, number of securities | Security	23	218
More than 12 months, fair value	$ 8,348	$ 12,774
More than 12 months, unrealized losses	$ 56	$ 409
More than 12 months, number of securities | Security	18	39
Total, fair value	$ 13,139	$ 152,214
Total, unrealized losses	$ 79	$ 3,686
Total, number of securities | Security	41	257
Total Securities, Continuous Unrealized Loss Position [Abstract]
Less than 12 months, fair value	$ 5,647	$ 155,550
Less than 12 months, unrealized losses	$ 43	$ 3,715
Less than 12 months, number of securities | Security	24	239
More than 12 months, fair value	$ 8,348	$ 13,028
More than 12 months, unrealized losses	$ 56	$ 411
More than 12 months, number of securities | Security	18	40
Total, fair value	$ 13,995	$ 168,578
Total, unrealized losses	$ 99	$ 4,126
Total, number of securities | Security	42	279
Available for sale securities transferred at fair value to held to maturity	$ 0	$ 0
Proceeds from sale of available-for-sale securities	0	0
Gross realized gains (losses) on sale of available-for-sale securities	0	0
Other-than-temporary impairment losses	0	0
U.S. Government Sponsored Enterprises [Member]
Available-for-sale Securities, Continuous Unrealized Loss Position [Abstract]
Less than 12 months, fair value		969
Less than 12 months, unrealized losses		$ 30
Less than 12 months, number of securities | Security		1
More than 12 months, fair value		$ 0
More than 12 months, unrealized losses		$ 0
More than 12 months, number of securities | Security		0
Total, fair value		$ 969
Total, unrealized losses		$ 30
Total, number of securities | Security		1
Held-to-maturity Securities, Continuous Unrealized Loss Position [Abstract]
Less than 12 months, fair value	0	$ 7,018
Less than 12 months, unrealized losses	$ 0	$ 227
Less than 12 months, number of securities | Security	0	1
More than 12 months, fair value	$ 1,986	$ 1,949
More than 12 months, unrealized losses	$ 14	$ 51
More than 12 months, number of securities | Security	1	1
Total, fair value	$ 1,986	$ 8,967
Total, unrealized losses	$ 14	$ 278
Total, number of securities | Security	1	2
State and Political Subdivisions [Member]
Available-for-sale Securities, Continuous Unrealized Loss Position [Abstract]
Less than 12 months, fair value		$ 2,094
Less than 12 months, unrealized losses		$ 1
Less than 12 months, number of securities | Security		4
More than 12 months, fair value		$ 0
More than 12 months, unrealized losses		$ 0
More than 12 months, number of securities | Security		0
Total, fair value		$ 2,094
Total, unrealized losses		$ 1
Total, number of securities | Security		4
Held-to-maturity Securities, Continuous Unrealized Loss Position [Abstract]
Less than 12 months, fair value	$ 3,541	$ 34,743
Less than 12 months, unrealized losses	$ 17	$ 434
Less than 12 months, number of securities | Security	22	167
More than 12 months, fair value	$ 2,111	$ 4,352
More than 12 months, unrealized losses	$ 6	$ 98
More than 12 months, number of securities | Security	13	34
Total, fair value	$ 5,652	$ 39,095
Total, unrealized losses	$ 23	$ 532
Total, number of securities | Security	35	201
Mortgage-backed Securities-Residential [Member]
Available-for-sale Securities, Continuous Unrealized Loss Position [Abstract]
Less than 12 months, fair value	$ 856	$ 2,420
Less than 12 months, unrealized losses	$ 20	$ 98
Less than 12 months, number of securities | Security	1	3
More than 12 months, fair value	$ 0	$ 0
More than 12 months, unrealized losses	$ 0	$ 0
More than 12 months, number of securities | Security	0	0
Total, fair value	$ 856	$ 2,420
Total, unrealized losses	$ 20	$ 98
Total, number of securities | Security	1	3
Held-to-maturity Securities, Continuous Unrealized Loss Position [Abstract]
Less than 12 months, fair value		$ 1,403
Less than 12 months, unrealized losses		$ 7
Less than 12 months, number of securities | Security		3
More than 12 months, fair value		$ 0
More than 12 months, unrealized losses		$ 0
More than 12 months, number of securities | Security		0
Total, fair value		$ 1,403
Total, unrealized losses	$ 0	$ 7
Total, number of securities | Security		3
Mortgage-backed Securities-Multi-Family [Member]
Available-for-sale Securities, Continuous Unrealized Loss Position [Abstract]
Less than 12 months, fair value		$ 9,177
Less than 12 months, unrealized losses		$ 244
Less than 12 months, number of securities | Security		7
More than 12 months, fair value		$ 0
More than 12 months, unrealized losses		$ 0
More than 12 months, number of securities | Security		0
Total, fair value		$ 9,177
Total, unrealized losses		$ 244
Total, number of securities | Security		7
Held-to-maturity Securities, Continuous Unrealized Loss Position [Abstract]
Less than 12 months, fair value	1,250	$ 94,927
Less than 12 months, unrealized losses	$ 6	$ 2,586
Less than 12 months, number of securities | Security	1	45
More than 12 months, fair value	$ 3,799	$ 6,398
More than 12 months, unrealized losses	$ 11	$ 259
More than 12 months, number of securities | Security	3	3
Total, fair value	$ 5,049	$ 101,325
Total, unrealized losses	$ 17	$ 2,845
Total, number of securities | Security	4	48
Corporate Debt Securities [Member]
Available-for-sale Securities, Continuous Unrealized Loss Position [Abstract]
Less than 12 months, fair value		$ 1,450
Less than 12 months, unrealized losses		$ 65
Less than 12 months, number of securities | Security		6
More than 12 months, fair value		$ 254
More than 12 months, unrealized losses		$ 2
More than 12 months, number of securities | Security		1
Total, fair value		$ 1,704
Total, unrealized losses		$ 67
Total, number of securities | Security		7
Held-to-maturity Securities, Continuous Unrealized Loss Position [Abstract]
Less than 12 months, fair value	$ 0	$ 457
Less than 12 months, unrealized losses	$ 0	$ 9
Less than 12 months, number of securities | Security	0	1
More than 12 months, fair value	$ 452	$ 0
More than 12 months, unrealized losses	$ 25	$ 0
More than 12 months, number of securities | Security	1	0
Total, fair value	$ 452	$ 457
Total, unrealized losses	$ 25	$ 9
Total, number of securities | Security	1	1
Other Securities [Member]
Held-to-maturity Securities, Continuous Unrealized Loss Position [Abstract]
Less than 12 months, fair value		$ 892
Less than 12 months, unrealized losses		$ 14
Less than 12 months, number of securities | Security		1
More than 12 months, fair value		$ 75
More than 12 months, unrealized losses		$ 1
More than 12 months, number of securities | Security		1
Total, fair value		$ 967
Total, unrealized losses	$ 0	$ 15
Total, number of securities | Security		2