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Property, Plant and Equipment and Leases - Schedule of Future Minimum Lease Payments (Details) $ in Thousands	Dec. 31, 2017 USD ($)
Operating
2018	$ 4,341
2019	4,136
2020	3,786
2021	3,482
2022	3,578
2023 and beyond	3,202
Total	22,525
Capital
2018	22
2019	21
2020	20
2021	20
2022	19
2023 and beyond	51
Total	$ 153

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Amount of minimum lease payments for capital leases.

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