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7. Leases (Details)
$ in Thousands
9 Months Ended
Sep. 30, 2019
USD ($)
Leases [Abstract]  
Operating lease cost $ 3,816
Cash paid for amounts included in the measurement of lease liabilities 650
Operating cash flows from operating leases 0
Right-of-use assets obtained in exchange for new finance operating liabilities $ 9
Weighted-average remaining lease term - operating leases 4 years
Weighted-average discount rate - operating leases 2.88%