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Leases - Previous lease accounting, maturities of lease liabilities (Details)
$ in Thousands
Dec. 31, 2018
USD ($)
Rent Payments  
2019 $ 9,402
2020 9,601
2021 9,341
2022 9,011
2023 9,169
Thereafter 43,556
Total lease payments 90,080
Sublease Receipts  
2019 (1,087)
2020 (873)
2021 (775)
2022 (804)
2023 (827)
Thereafter (1,382)
Total Sublease receipts (5,748)
Total Cash Outflows  
2019 8,315
2020 8,728
2021 8,566
2022 8,207
2023 8,342
Thereafter 42,174
Total Cash Outflows $ 84,332