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Employee Benefits - Postretirement Plan Benefit Payments Expected Future Service (Detail) $ in Thousands	Jun. 30, 2020 USD ($)
Retirement Benefits [Abstract]
2021	$ 137
2022	168
2023	183
2024	199
2025	195
2026-2030	$ 986

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Amount of benefits for defined benefit plan expected to be paid in five fiscal years after fifth fiscal year following latest fiscal year.

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Amount of benefits for defined benefit plan expected to be paid in next fiscal year following latest fiscal year.

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Amount of benefits for defined benefit plan expected to be paid in fifth fiscal year following latest fiscal year.

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Amount of benefits for defined benefit plan expected to be paid in fourth fiscal year following latest fiscal year.

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Amount of benefits for defined benefit plan expected to be paid in third fiscal year following latest fiscal year.

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Amount of benefits for defined benefit plan expected to be paid in second fiscal year following latest fiscal year.

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