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Employee Benefit Plans

3 Months Ended

Sep. 30, 2014

Compensation and Retirement Disclosure [Abstract]

Employee Benefit Plans

   7.    Employee Benefit Plans

The Company maintains a noncontributory defined benefit pension plan for all domestic nonunion employees employed on or prior to December 31, 2013, who meet certain requirements of age, length of service and hours worked per year. Plan benefits are based upon years of service and average compensation, as defined within the plan.

Net periodic pension expense was:

​	​	​	​	Three Months												​
​	For the Periods Ended September 30	​	​	2014					​	​	2013					​
​	Service cost – benefits earned during the period	​	​	​	$	821		​	​	​	​	$	704		​	​
​	Interest cost on benefit obligation	​	​	​	​	734		​	​	​	​	​	641		​	​
​	Expected return on plan assets	​	​	​	​	(766	)	​	​	​	​	​	(698	)	​	​
​	Amortization of net actuarial (gain) loss and prior service costs	​	​	​	​	286		​	​	​	​	​	203		​	​
​	Net periodic pension expense	​	​	​	$	1,075		​	​	​	​	$	850		​	​
​	​	​	​				​		​	​				​		​

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- Definition

The entire disclosure for an entity's employee compensation and benefit plans, including, but not limited to, postemployment and postretirement benefit plans, defined benefit pension plans, defined contribution plans, non-qualified and supplemental benefit plans, deferred compensation, share-based compensation, life insurance, severance, health care, unemployment and other benefit plans.

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