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Income Taxes Income Taxes (Effective Tax Rate) (Details) - USD ($)
$ in Thousands
 3 Months Ended 12 Months Ended
Jun. 30, 2017
Mar. 31, 2017
Dec. 31, 2016
Sep. 30, 2016
Jun. 30, 2016
Mar. 31, 2016
Dec. 31, 2015
Sep. 30, 2015
Jun. 30, 2017
Jun. 30, 2016
Jun. 30, 2015
Income Tax Reconciliation [Abstract]                      
Federal income tax statutory rate, Amount                 $ 2,988 $ 4,496 $ 5,892
State income tax, Amount                 629 902 1,239
Changes in taxes resulting from:                      
Bank-owned life insurance, Amount                 (57) (65) (65)
Non-deductible expenses, Amount                 43 45 43
Non-deductible stock-based compensation, Amount                 6 (6) 139
Other, Amount                 0 0 29
Provision for income taxes $ 560 $ 690 $ 1,095 $ 1,264 $ 1,863 $ 1,051 $ 708 $ 1,750 $ 3,609 $ 5,372 $ 7,277
Effective Income Tax Rate Reconciliation [Abstract]                      
Federal income tax statutory rate, Tax Rate                 33.90% 35.00% 34.50%
State income tax, Tax Rate                 7.10% 7.00% 7.30%
Changes in taxes resulting from:                      
Bank-owned life insurance, Tax Rate                 0.70% 0.50% 0.40%
Non-deductible expenses, Tax Rate                 0.50% 0.40% 0.30%
Non-deductible stock-based compensation, Tax Rate                 (0.10%) 0.10% (0.80%)
Other, Tax Rate                 0.00% 0.00% 0.10%
Effective income tax, Tax Rate                 40.90% 41.80% 42.60%