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Commitments, Contingencies and Other Items (Future Minimum Payments, Operating Leases) (Details)
$ in Thousands
Dec. 31, 2018
USD ($)
Commitments and Contingencies Disclosure [Abstract]  
2019 $ 7,137
2020 5,294
2021 4,934
2022 4,225
2023 1,530
After 2023 298
Future minimum lease payments under existing operating leases $ 23,418