Securities, Securities in Continuous Unrealized Loss Position (Details) $ in Thousands	3 Months Ended		9 Months Ended
	Mar. 31, 2019 USD ($) Security	Mar. 31, 2018 USD ($)	Mar. 31, 2019 USD ($) Security	Mar. 31, 2018 USD ($)	Jun. 30, 2018 USD ($) Security
Available-for-sale Securities, Continuous Unrealized Loss Position [Abstract]
Less than 12 months, fair value	$ 871		$ 871		$ 16,110
Less than 12 months, unrealized losses	$ 41		$ 41		$ 438
Less than 12 months, number of securities | Security	1		1		21
More than 12 months, fair value	$ 5,799		$ 5,799		$ 254
More than 12 months, unrealized losses	$ 38		$ 38		$ 2
More than 12 months, number of securities | Security	10		10		1
Total, fair value	$ 6,670		$ 6,670		$ 16,364
Total, unrealized losses	$ 79		$ 79		$ 440
Total, number of securities | Security	11		11		22
Held-to-maturity Securities, Continuous Unrealized Loss Position [Abstract]
Less than 12 months, fair value	$ 39,009		$ 39,009		$ 139,440
Less than 12 months, unrealized losses	$ 284		$ 284		$ 3,277
Less than 12 months, number of securities | Security	99		99		218
More than 12 months, fair value	$ 33,293		$ 33,293		$ 12,774
More than 12 months, unrealized losses	$ 216		$ 216		$ 409
More than 12 months, number of securities | Security	87		87		39
Total, fair value	$ 72,302		$ 72,302		$ 152,214
Total, unrealized losses	$ 500		$ 500		$ 3,686
Total, number of securities | Security	186		186		257
Total Securities, Continuous Unrealized Loss Position [Abstract]
Less than 12 months, fair value	$ 39,880		$ 39,880		$ 155,550
Less than 12 months, unrealized losses	$ 325		$ 325		$ 3,715
Less than 12 months, number of securities | Security	100		100		239
More than 12 months, fair value	$ 39,092		$ 39,092		$ 13,028
More than 12 months, unrealized losses	$ 254		$ 254		$ 411
More than 12 months, number of securities | Security	97		97		40
Total, fair value	$ 78,972		$ 78,972		$ 168,578
Total, unrealized losses	$ 579		$ 579		$ 4,126
Total, number of securities | Security	197		197		279
Proceeds from sale of available-for-sale securities, debt	$ 0	$ 0	$ 0	$ 0
Gross realized gains (losses) on sale of available-for-sale securities	0	0	0	0
Other-than-temporary impairment losses	0	$ 0	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		0		$ 7,018
Less than 12 months, unrealized losses	$ 0		$ 0		$ 227
Less than 12 months, number of securities | Security	0		0		1
More than 12 months, fair value	$ 6,197		$ 6,197		$ 1,949
More than 12 months, unrealized losses	$ 50		$ 50		$ 51
More than 12 months, number of securities | Security	3		3		1
Total, fair value	$ 6,197		$ 6,197		$ 8,967
Total, unrealized losses	$ 50		$ 50		$ 278
Total, number of securities | Security	3		3		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	$ 11,292		$ 11,292		$ 34,743
Less than 12 months, unrealized losses	$ 71		$ 71		$ 434
Less than 12 months, number of securities | Security	89		89		167
More than 12 months, fair value	$ 7,197		$ 7,197		$ 4,352
More than 12 months, unrealized losses	$ 48		$ 48		$ 98
More than 12 months, number of securities | Security	68		68		34
Total, fair value	$ 18,489		$ 18,489		$ 39,095
Total, unrealized losses	$ 119		$ 119		$ 532
Total, number of securities | Security	157		157		201
Mortgage-backed Securities-Residential [Member]
Available-for-sale Securities, Continuous Unrealized Loss Position [Abstract]
Less than 12 months, fair value	$ 871		$ 871		$ 2,420
Less than 12 months, unrealized losses	$ 41		$ 41		$ 98
Less than 12 months, number of securities | Security	1		1		3
More than 12 months, fair value	$ 1,114		$ 1,114		$ 0
More than 12 months, unrealized losses	$ 5		$ 5		$ 0
More than 12 months, number of securities | Security	2		2		0
Total, fair value	$ 1,985		$ 1,985		$ 2,420
Total, unrealized losses	$ 46		$ 46		$ 98
Total, number of securities | Security	3		3		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		$ 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	0		0		$ 9,177
Less than 12 months, unrealized losses	$ 0		$ 0		$ 244
Less than 12 months, number of securities | Security	0		0		7
More than 12 months, fair value	$ 2,927		$ 2,927		$ 0
More than 12 months, unrealized losses	$ 26		$ 26		$ 0
More than 12 months, number of securities | Security	2		2		0
Total, fair value	$ 2,927		$ 2,927		$ 9,177
Total, unrealized losses	$ 26		$ 26		$ 244
Total, number of securities | Security	2		2		7
Held-to-maturity Securities, Continuous Unrealized Loss Position [Abstract]
Less than 12 months, fair value	$ 27,717		$ 27,717		$ 94,927
Less than 12 months, unrealized losses	$ 213		$ 213		$ 2,586
Less than 12 months, number of securities | Security	10		10		45
More than 12 months, fair value	$ 18,961		$ 18,961		$ 6,398
More than 12 months, unrealized losses	$ 101		$ 101		$ 259
More than 12 months, number of securities | Security	14		14		3
Total, fair value	$ 46,678		$ 46,678		$ 101,325
Total, unrealized losses	$ 314		$ 314		$ 2,845
Total, number of securities | Security	24		24		48
Corporate Debt Securities [Member]
Available-for-sale Securities, Continuous Unrealized Loss Position [Abstract]
Less than 12 months, fair value	$ 0		$ 0		$ 1,450
Less than 12 months, unrealized losses	$ 0		$ 0		$ 65
Less than 12 months, number of securities | Security	0		0		6
More than 12 months, fair value	$ 1,758		$ 1,758		$ 254
More than 12 months, unrealized losses	$ 7		$ 7		$ 2
More than 12 months, number of securities | Security	6		6		1
Total, fair value	$ 1,758		$ 1,758		$ 1,704
Total, unrealized losses	$ 7		$ 7		$ 67
Total, number of securities | Security	6		6		7
Held-to-maturity Securities, Continuous Unrealized Loss Position [Abstract]
Less than 12 months, fair value	$ 0		$ 0		$ 457
Less than 12 months, unrealized losses	$ 0		$ 0		$ 9
Less than 12 months, number of securities | Security	0		0		1
More than 12 months, fair value	$ 460		$ 460		$ 0
More than 12 months, unrealized losses	$ 15		$ 15		$ 0
More than 12 months, number of securities | Security	1		1		0
Total, fair value	$ 460		$ 460		$ 457
Total, unrealized losses	$ 15		$ 15		$ 9
Total, number of securities | Security	1		1		1
Other Securities [Member]
Held-to-maturity Securities, Continuous Unrealized Loss Position [Abstract]
Less than 12 months, fair value	$ 0		$ 0		$ 892
Less than 12 months, unrealized losses	$ 0		$ 0		$ 14
Less than 12 months, number of securities | Security	0		0		1
More than 12 months, fair value	$ 478		$ 478		$ 75
More than 12 months, unrealized losses	$ 2		$ 2		$ 1
More than 12 months, number of securities | Security	1		1		1
Total, fair value	$ 478		$ 478		$ 967
Total, unrealized losses	$ 2		$ 2		$ 15
Total, number of securities | Security	1		1		2