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Leases - Supplemental Cash Flow Information (Details)
$ in Thousands
12 Months Ended
Dec. 31, 2019
USD ($)
Cash paid for amounts included in the measurement of lease liabilities:  
Operating cash flows for operating leases $ 14,804
Operating cash flows for finance leases 2
Financing cash flows for finance leases 8
Non-cash right-of-use assets obtained in exchange for lease obligations:  
Operating leases 9,530
Finance leases $ 289