Employee Benefit Plans - Components of Net Periodic Pension Cost (Details) - USD ($) $ in Thousands |
12 Months Ended | ||||
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Jun. 30, 2019 |
Jun. 30, 2018 |
Jun. 30, 2017 |
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| Components of net periodic pension cost | |||||
| Service cost | [1] | $ 4,220 | $ 4,127 | $ 4,015 | |
| Interest cost | 1,132 | 1,302 | 1,117 | ||
| Return on plan assets | (476) | (428) | (393) | ||
| Amortization of transitional obligation | 0 | 0 | 251 | ||
| Amortization of prior service cost | 21 | 26 | 46 | ||
| Amortization of net loss | 1,047 | 1,731 | 1,617 | ||
| Net periodic pension cost | $ 5,944 | $ 6,758 | $ 6,653 | ||
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- Definition Amount of gain (loss) recognized in net periodic benefit (cost) credit of defined benefit plan. Reference 1: http://www.xbrl.org/2003/role/disclosureRef
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- Definition Amount of prior service cost (credit) recognized in net periodic benefit cost (credit) of defined benefit plan. Reference 1: http://www.xbrl.org/2003/role/exampleRef
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- Definition Amount of transition asset (obligation) recognized in net periodic benefit (cost) credit of defined benefit plan. Reference 1: http://www.xbrl.org/2003/role/disclosureRef
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- Definition Amount of expected return (loss) recognized in net periodic benefit (cost) credit, calculated based on expected long-term rate of return and market-related value of plan assets of defined benefit plan. Reference 1: http://www.xbrl.org/2003/role/exampleRef
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- Definition Amount of cost recognized for passage of time related to defined benefit plan. Reference 1: http://www.xbrl.org/2003/role/disclosureRef
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- Definition Amount of net periodic benefit cost (credit) for defined benefit plan. Reference 1: http://www.xbrl.org/2003/role/disclosureRef
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- References No definition available.
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- Definition Amount of cost for actuarial present value of benefits attributed to service rendered by employee for defined benefit plan. Reference 1: http://www.xbrl.org/2003/role/disclosureRef
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