Annual report pursuant to Section 13 and 15(d)

Leases (Details)

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Leases (Details) - USD ($)
$ in Thousands
12 Months Ended
Dec. 31, 2019
Dec. 31, 2018
Dec. 31, 2017
Leases [Abstract]      
Operating lease cost $ 4,900 $ 4,200 $ 3,800
2020 5,420    
2021 4,907    
2022 3,898    
2023 3,638    
2024 842    
Thereafter 2,419    
Total undiscounted cash flows 21,124    
Less amount representing interest (2,321)    
Present value of lease liabilities $ 18,803    
Weighted-average remaining lease term 4 years 8 months 12 days    
Weighted-average discount rate 4.90%