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Earnings Per Share: Schedule of Earnings Per Share, Basic and Diluted (Details) - USD ($)
$ / shares in Units, shares in Thousands, $ in Thousands
 3 Months Ended 12 Months Ended
Jun. 30, 2015
Mar. 31, 2015
Dec. 31, 2014
Sep. 30, 2014
Jun. 30, 2014
Mar. 31, 2014
Dec. 31, 2013
Sep. 30, 2013
Jun. 30, 2015
Jun. 30, 2014
Jun. 30, 2013
Earnings Per Share, Diluted, by Common Class, Including Two Class Method [Line Items]                      
Income (Numerator), basic and diluted earnings per share $ 2,485 $ 2,600 $ 2,328 $ 2,390 $ 2,091 $ 1,399 $ 1,603 $ 1,513 $ 9,803 $ 6,606 $ 25,797
Basic EPS, Shares (Denominator)                 8,996,952 9,926,323 10,601,145
Diluted EPS, Shares (Denominator)                 9,173,857 10,110,785 10,835,200
Basic EPS, Per-Share Amount (in dollars per share) $ 0.29 $ 0.29 $ 0.26 $ 0.26 $ 0.22 $ 0.14 $ 0.16 $ 0.15 $ 1.09 $ 0.67 $ 2.43
Diluted EPS, Per-Share Amount (in dollars per share) $ 0.28 $ 0.29 $ 0.25 $ 0.25 $ 0.22 $ 0.14 $ 0.16 $ 0.14 $ 1.07 $ 0.65 $ 2.38
Stock Options                      
Earnings Per Share, Diluted, by Common Class, Including Two Class Method [Line Items]                      
Effect of dilutive shares                 115,341 153,219 160,861
Restricted Stock                      
Earnings Per Share, Diluted, by Common Class, Including Two Class Method [Line Items]                      
Effect of dilutive shares                 61,564 31,243 73,194