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Leases - Maturity of Lease Liability - Lessor (Details)
$ in Thousands
Mar. 31, 2019
USD ($)
Leases [Abstract]  
2019 $ 5,241
2020 6,109
2021 4,042
2022 2,914
2023 1,345
2024 and thereafter 4,400
Total sublease income $ 24,051