Securities, Securities in Continuous Unrealized Loss Position (Details) $ in Thousands	12 Months Ended
	Jun. 30, 2017 USD ($) Security	Jun. 30, 2016 USD ($) Security
Available-for-sale Securities, Continuous Unrealized Loss Position [Abstract]
Less than 12 months, fair value	$ 8,412	$ 924
Less than 12 months, unrealized losses	$ 92	$ 5
Less than 12 months, number of securities | Security	7	1
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	$ 8,412	$ 924
Total, unrealized losses	$ 92	$ 5
Total, number of securities | Security	7	1
Held-to-maturity Securities, Continuous Unrealized Loss Position [Abstract]
Less than 12 months, fair value	$ 42,072	$ 771
Less than 12 months, unrealized losses	$ 346	$ 6
Less than 12 months, number of securities | Security	84	5
More than 12 months, fair value	$ 588	$ 175
More than 12 months, unrealized losses	$ 20	$ 1
More than 12 months, number of securities | Security	7	2
Total, fair value	$ 42,660	$ 946
Total, unrealized losses	$ 366	$ 7
Total, number of securities | Security	91	7
Total Securities, Continuous Unrealized Loss Position [Abstract]
Less than 12 months, fair value	$ 50,484	$ 1,695
Less than 12 months, unrealized losses	$ 438	$ 11
Less than 12 months, number of securities | Security	91	6
More than 12 months, fair value	$ 588	$ 175
More than 12 months, unrealized losses	$ 20	$ 1
More than 12 months, number of securities | Security	7	2
Total, fair value	$ 51,072	$ 1,870
Total, unrealized losses	$ 458	$ 12
Total, number of securities | Security	98	8
Available for sale securities transferred at fair value to held to maturity	$ 0	$ 0
Gross realized gains on sale of available-for-sale securities	0	0
Other-than-temporary impairment losses	0	0
Net realized gains (losses)	0	0
Mortgage-backed Securities-Residential [Member]
Available-for-sale Securities, Continuous Unrealized Loss Position [Abstract]
Less than 12 months, fair value	1,164	924
Less than 12 months, unrealized losses	$ 27	$ 5
Less than 12 months, number of securities | Security	1	1
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	$ 1,164	$ 924
Total, unrealized losses	$ 27	$ 5
Total, number of securities | Security	1	1
Mortgage-backed Securities-Multi-Family [Member]
Available-for-sale Securities, Continuous Unrealized Loss Position [Abstract]
Less than 12 months, fair value	$ 6,488
Less than 12 months, unrealized losses	$ 62
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	$ 6,488
Total, unrealized losses	$ 62
Total, number of securities | Security	4
Corporate Debt Securities [Member]
Available-for-sale Securities, Continuous Unrealized Loss Position [Abstract]
Less than 12 months, fair value	$ 760
Less than 12 months, unrealized losses	$ 3
Less than 12 months, number of securities | Security	2
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	$ 760
Total, unrealized losses	$ 3
Total, number of securities | Security	2
U.S. Government Sponsored Enterprises [Member]
Held-to-maturity Securities, Continuous Unrealized Loss Position [Abstract]
Less than 12 months, fair value	$ 5,947
Less than 12 months, unrealized losses	$ 53
Less than 12 months, number of securities | Security	2
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	$ 5,947
Total, unrealized losses	$ 53	$ 0
Total, number of securities | Security	2
State and Political Subdivisions [Member]
Held-to-maturity Securities, Continuous Unrealized Loss Position [Abstract]
Less than 12 months, fair value	$ 8,976	272
Less than 12 months, unrealized losses	$ 76	$ 2
Less than 12 months, number of securities | Security	64	1
More than 12 months, fair value	$ 514	$ 175
More than 12 months, unrealized losses	$ 19	$ 1
More than 12 months, number of securities | Security	6	2
Total, fair value	$ 9,490	$ 447
Total, unrealized losses	$ 95	$ 3
Total, number of securities | Security	70	3
Mortgage-backed Securities-Residential [Member]
Held-to-maturity Securities, Continuous Unrealized Loss Position [Abstract]
Less than 12 months, fair value	$ 1,864
Less than 12 months, unrealized losses	$ 2
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	$ 1,864
Total, unrealized losses	$ 2	$ 0
Total, number of securities | Security	1
Mortgage-backed Securities-Multi-Family [Member]
Held-to-maturity Securities, Continuous Unrealized Loss Position [Abstract]
Less than 12 months, fair value	$ 23,823	499
Less than 12 months, unrealized losses	$ 199	$ 4
Less than 12 months, number of securities | Security	15	4
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	$ 23,823	$ 499
Total, unrealized losses	$ 199	$ 4
Total, number of securities | Security	15	4
Corporate Debt Securities [Member]
Held-to-maturity Securities, Continuous Unrealized Loss Position [Abstract]
Less than 12 months, fair value	$ 995
Less than 12 months, unrealized losses	$ 5
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	$ 995
Total, unrealized losses	$ 5	$ 0
Total, number of securities | Security	1
Other Securities [Member]
Held-to-maturity Securities, Continuous Unrealized Loss Position [Abstract]
Less than 12 months, fair value	$ 467
Less than 12 months, unrealized losses	$ 11
Less than 12 months, number of securities | Security	1
More than 12 months, fair value	$ 74
More than 12 months, unrealized losses	$ 1
More than 12 months, number of securities | Security	1
Total, fair value	$ 541
Total, unrealized losses	$ 12	$ 0
Total, number of securities | Security	2