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Leases - Schedule of Future Payments Under Operating Lease Agreements, ASC 840 (Details)
$ in Thousands
Dec. 31, 2018
USD ($)
Operating Leases  
2019 $ 16,925
2020 14,212
2021 10,538
2022 8,178
2023 6,529
Thereafter 21,196
Total minimum lease payments $ 77,578