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Employee Benefit Plans (Tables)
12 Months Ended
Jun. 30, 2015
Compensation and Retirement Disclosure [Abstract]  
Schedule of changes in projected benefit obligation, plan assets and the funded status
For the Years Ended June 30
2015
2014
Change in projected benefit obligation
Projected benefit obligation at beginning of year
$ 57,599 $ 46,569
Service cost
2,954 2,457
Interest cost
2,618 2,333
Benefits paid
(1,116) (1,092)
Actuarial (gain) loss
550 7,332
Projected benefit obligation at end of year
$ 62,605 $ 57,599
Change in plan assets
Fair value of plan assets at beginning of year
$ 39,581 $ 31,501
Actual return on plan assets
(1,248) 4,339
Employer contributions
6,815 4,833
Benefits paid
(1,116) (1,092)
Fair value of plan assets at end of year
$ 44,032 $ 39,581
Funded status at end of year
$

(18,573)
$ (18,018)


Schedule of accumulated other comprehensive (income) loss related to the pension plan
For the Years Ended June 30
2015
2014
Balance at beginning of period
$ 16,663 $ 12,240
Amortization of net actuarial loss (gain) and prior service costs
(1,405) (903)
Current period net actuarial loss (gain)
4,626 5,326
Net change
3,221 4,423
Balance at end of period
$ 19,884 $ 16,663


Schedule of net periodic pension expense
For the Years Ended June 30
2015
2014
2013
Service cost−benefits earned during the year
$ 2,954 $ 2,457 $​ 2,729
Interest cost on benefit obligation
2,618 2,333 2,058
Expected return on plan assets
(2,828) (2,334) (2,136)
Amortization of net actuarial loss and prior service costs
1,405 904 1,405
Net periodic pension expense
$ 4,149 $ 3,360 $ 4,056
Schedule of significant actuarial assumptions
For the Years Ended June 30
2015
2014
2013
Discount rate for service and interest
4.5%​
5.0%​
4.4%​
Expected rate of return on plan assets
6.7%​
7.0%​
7.5%​
Rate of compensation increase
3.0%–3.75%​
3.0%–4.5%​
3.0%–4.5%​
Discount rate for year-end benefit obligation
4.6%​
4.5%​
5.0%​


Schedule of estimated future benefit payments, including benefits attributable to future service
For the Years Ended June 30
2016
$ 1,685
2017
1,938
2018
2,173
2019
2,433
2020
2,724
2021–2024
17,886


Schedule of weighted-average asset allocation of plan assets
Target
Allocation
Percentage of Plan Assets
For the years ended June 30
2016
2015
2014
Debt securities
10%–35%​
19% 20%
Equity securities
20%–50%​
35% 35%
Global asset allocation/risk parity(1)
20%–40%​
35% 35%
Other
0%–25%​
11% 10%
(1)
The global asset allocation/risk parity category consists of a variety of asset classes including, but not limited to, global bonds, global equities, real estate and commodities.
Schedule of fair values of the Company's plan assets by asset category
Fair Value Measurements Using
As of June 30, 2015
Level 1
Level 2
Level 3
Total
Cash and cash equivalents
$ 129 $ $ $ 129
Common-collective funds
Global large cap equities
10,995 10,995
Fixed income securities
8,565 8,565
Global asset allocations/risk parity
6,685 6,685
Mutual funds
Global equities
4,366 4,366
Global asset allocations/risk parity
4,303 4,303
Other
Global asset allocations/risk parity
4,251 4,251
Other
4,738 4,738
$ 8,798 $ 26,245 $ 8,989 $ 44,032
Fair Value Measurements Using
As of June 30, 2014
Level 1
Level 2
Level 3
Total
Cash and cash equivalents
$ 138 $ $ $ 138
Common-collective funds
Global large cap equities
9,909 9,909
Fixed income securities
3,935 3,935
Global asset allocations/risk parity
5,803 5,803
Mutual funds
Global equities
3,925 3,925
Fixed income securities
1,913 1,913
Global asset allocations/risk parity
3,927 3,927
Other
Fixed income securities
2,007 2,007
Global asset allocations/risk parity
3,954 3,954
Other
4,070 4,070
$ 9,903 $ 19,647 $ 10,031 $ 39,581


Schedule of summary of the changes in the fair value of level 3 assets
Change in Fair Value Level 3 assets
2015
2014
Balance at beginning of period
$ 10,031 $ 280
Redemptions
(2,026) 22
Purchases
1,280 9,773
Change in fair value
(296) (44)
Balance at end of period
$ 8,989 $ 10,031