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Employee Benefit Plans - Estimated future benefit payments including benefits attributable to future service (Details 4)
$ in Thousands
Jun. 30, 2017
USD ($)
Compensation and Retirement Disclosure [Abstract]  
2018 $ 2,156
2019 2,388
2020 2,612
2021 2,815
2022 3,014
2023-2027 $ 17,073