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Stock Based Compensation (Tables)
 12 Months Ended
Jun. 30, 2015
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, 2012
464

 
$
16.19

 
 
Granted
—

 
—

 
 
Forfeited
—

 
—

 
 
Exercised
(320
)
 
13.68

 
 
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 June 30, 2015
100

 
$
23.07

 
$
4,164

Vested June 30, 2015
100

 
$
23.07

 
$
4,164

Exercisable June 30, 2015
100

 
$
23.07

 
$
4,164
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, 2012
332

 
$
23.13

Granted
53

 
36.78

Vested
(125
)
 
23.17

Forfeited
(8
)
 
23.11

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 June 30, 2015
72

 
$
34.28
Schedule of Nonvested Restricted Stock Units Activity [Table Text Block]
The following table summarizes non-vested unit awards as of June 30, 2015, as well as activity for the year then ended:
Unit awards
Shares
 
Weighted
Average
Grant Date
Fair Value
Outstanding July 1, 2012
672

 
$
18.05

Granted
174

 
42.39

Vested
—

 
—

Forfeited
(32
)
 
22.45

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 June 30, 2015
499

 
$
48.13
ScheduleOfShareBasedPaymentAwardRSUValuationAssumptionsTableTextBlock [Table Text Block]
The weighted average assumptions used in the model to measure fair value at the grant dates are as follows:
 
Year Ended June 30,
 
2015
 
2014
 
2013
Volatility
17.8
%
 
21.6
%
 
23.3
%
Risk free interest rate
1.06
%
 
0.91
%
 
0.33
%
Dividend yield
1.5
%
 
1.6
%
 
1.2
%
Stock Beta
0.765

 
0.837

 
0.864