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Stock-based Compensation (Tables)
 6 Months Ended
Dec. 31, 2012
Stock-Based Compensation Tables  
Schedule of weighted average assumptions for option awards

   December 31, 2011 
Dividend yield   3.59% 
Expected stock price volatility   33.82% 
Risk-free interest rate   0.64% 
Expected option life (in years)   3.7 yrs 
Weighted average fair value per share of options granted during the period  $4.757 
Schedule of stock option activity

   Employee Stock Options Plan 
           Weighted     
   Number of   Weighted   Average     
   Shares   Average   Remaining   Aggregate 
   Subject   Exercise   Contractual   Intrinsic 
   To Option   Price   Term   Value 
Balance at July 1, 2012   187,050   $20.69    6.96      
Granted   —    —    —      
Exercised   (23,400)  $17.85    —      
Forfeited or expired   (500)  $25.14    —      
Outstanding at December 31, 2012   163,150   $21.08    6.73   $672,374 
Vested or expected to vest at December 31, 2012   155,295   $20.87    6.62   $671,908 
Exercisable at December 31, 2012   105,200   $18.84    5.47   $668,927