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Stock Based Compensation (Tables)
 12 Months Ended
Jun. 30, 2016
Disclosure of Compensation Related Costs, Share-based Payments [Abstract]  
Schedule of Share-based Compensation, Stock Options, Activity [Table Text Block]
A summary of option plan activity under the plan is as follows:
 
Number of Shares
 
Weighted Average Exercise Price
 
Aggregate
 Intrinsic
 Value
Outstanding July 1, 2013
144

 
21.79

 
 
Granted
—

 
—

 
 
Forfeited
—

 
—

 
 
Exercised
(19
)
 
18.42

 
 
Outstanding July 1, 2014
125

 
22.29

 
 
Granted
—

 
—

 
 
Forfeited
—

 
—

 
 
Exercised
(25
)
 
19.17

 
 
Outstanding July 1, 2015
100

 
23.07

 
 
Granted
—

 
—

 
 
Forfeited
—

 
—

 
 
Exercised
(50
)
 
23.99

 
 
Outstanding June 30, 2016
50

 
$
22.14

 
$
3,256

Vested June 30, 2016
50

 
$
22.14

 
$
3,256

Exercisable June 30, 2016
50

 
$
22.14

 
$
3,256
Schedule of Nonvested Restricted Stock Activity [Table Text Block]
The following table summarizes non-vested share awards activity:
Share awards
Shares
 
Weighted
Average
Grant Date
Fair Value
Outstanding July 1, 2013
252

 
25.92

Granted
30

 
54.13

Vested
(143
)
 
24.41

Forfeited
(1
)
 
22.17

Outstanding July 1, 2014
138

 
33.56

Granted
12

 
57.77

Vested
(71
)
 
35.69

Forfeited
(7
)
 
46.39

Outstanding July 1, 2015
72

 
34.28

Granted
22

 
66.31

Vested
(24
)
 
43.45

Forfeited
(12
)
 
23.82

Outstanding June 30, 2016
58

 
$
44.95
Schedule of Nonvested Restricted Stock Units Activity [Table Text Block]
The following table summarizes non-vested unit awards as of June 30, 2016, as well as activity for the year then ended:
Unit awards
Shares
 
Weighted
Average
Grant Date
Fair Value
 
Aggregate
Intrinsic
Value
Outstanding July 1, 2013
814

 
23.08

 
 
Granted
164

 
48.21

 
 
Vested
(168
)
 
15.77

 
 
Forfeited
(101
)
 
15.77

 
 
Outstanding July 1, 2014
709

 
31.66

 
 
Granted
178

 
53.62

 
 
Vested
(277
)
 
19.69

 
 
Forfeited
(111
)
 
22.74

 
 
Outstanding July 1, 2015
499

 
48.13

 
 
Granted
130

 
75.99

 
 
Vested
(99
)
 
44.09

 
 
Forfeited
(101
)
 
45.89

 
 
Outstanding June 30, 2016
429

 
$58.06
 
$37,415
ScheduleOfShareBasedPaymentAwardRSUValuationAssumptionsTableTextBlock [Table Text Block]
The weighted average assumptions used in this model to estimate fair value at the grant dates are as follows:
 
Year Ended June 30,
 
2016

 
2015

 
2014

Volatility
15.6
%
 
17.8
%
 
21.6
%
Risk free interest rate
1.06
%
 
1.06
%
 
0.91
%
Dividend yield
1.5
%
 
1.5
%
 
1.6
%
Stock Beta
0.741

 
0.765

 
0.837