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Employee Benefit Plans (Tables) | 9 Months Ended
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Mar. 31, 2015
Compensation and Retirement Disclosure [Abstract] |
Schedule of net periodic pension expense |
​ | ​ | ​ | Three Months | ​ | ​ | Nine Months | ​
For the Periods Ended March 31 | ​ | ​ | 2015 | ​ | ​ | 2014 | ​ | ​ | 2015 | ​ | ​ | 2014 | ​
Service cost – benefits earned during the period | ​ | ​ | ​ | $ | 739 | ​ | ​ | ​ | ​ | $ | 535 | ​ | ​ | ​ | ​ | $ | 2,217 | ​ | ​ | ​ | ​ | $ | 1,843 | ​ | ​
Interest cost on benefit obligation | ​ | ​ | ​ | ​ | 654 | ​ | ​ | ​ | ​ | ​ | 532 | ​ | ​ | ​ | ​ | ​ | 1,963 | ​ | ​ | ​ | ​ | ​ | 1,750 | ​ | ​
Expected return on plan assets | ​ | ​ | ​ | ​ | (707) | ​ | ​ | ​ | ​ | ​ | (476) | ​ | ​ | ​ | ​ | ​ | (2,121) | ​ | ​ | ​ | ​ | ​ | (1,751) | ​ | ​
Amortization of net actuarial loss and prior service costs | ​ | ​ | ​ | ​ | 351 | ​ | ​ | ​ | ​ | ​ | 249 | ​ | ​ | ​ | ​ | ​ | 1,053 | ​ | ​ | ​ | ​ | ​ | 678 | ​ | ​
Net periodic pension expense | ​ | ​ | ​ | $ | 1,037 | ​ | ​ | ​ | ​ | $ | 840 | ​ | ​ | ​ | ​ | $ | 3,112 | ​ | ​ | ​ | ​ | $ | 2,520 | ​ | ​
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- Definition Tabular disclosure of the components of net benefit costs for pension plans and/or other employee benefit plans including service cost, interest cost, expected return on plan assets, gain (loss), prior service cost or credit, transition asset or obligation, and gain (loss) recognized due to settlements or curtailments. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 715 -SubTopic 20 -Section 50 -Paragraph 1 -Subparagraph (h) -URI http://asc.fasb.org/extlink&oid=35743120&loc=d3e1928-114920 + Details
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