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Leases Operating Leases (Details)
$ in Thousands
Dec. 31, 2018
USD ($)
Leases [Abstract]  
For the year ended 2019 $ 7,068
For the year ended 2020 5,635
For the year ended 2021 4,509
For the year ended 2022 3,523
For the year ended 2023 2,659
For the year ended 2024 and beyond $ 7,779