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Leases (Details) - USD ($)
$ in Thousands
 3 Months Ended
Mar. 31, 2020
Mar. 31, 2019
Dec. 31, 2019
Quantitative Lease Disclosures [Abstract]      
Renewal option period 5 years    
Assets [Abstract]      
Operating lease right-of-use assets $ 34,292   $ 36,020
Liabilities [Abstract]      
Sundry payables and accrued expenses 8,593   8,739
Noncurrent operating lease liabilities 26,841   28,376
Present value of lease liabilities $ 35,434   $ 37,115
Operating Leases [Abstract]      
Weighted average remaining lease term 5 years 6 months   5 years 7 months 6 days
Weighted average discount rate 3.70%   3.70%
Lease Expense [Abstract]      
Operating lease expense $ 2,313 [1] $ 2,224  
Excluded expenses of non lease 400 500  
Cash Paid for the amounts included in the measurement of lease liabilities [Abstract]      
Operating cash flows from operating leases 2,476 2,161  
Right-of-use assets obtained in exchange for new lease obligations [Abstract]      
Operating leases 251 $ 566  
Minimum Lease Payments [Abstract]      
2020 6,702    
2021 8,325    
2022 6,987    
2023 5,675    
2024 3,881    
Thereafter 7,844    
Total lease payments 39,414    
Less: Interest (3,980)    
Present value of lease liabilities $ 35,434   $ 37,115
Maximum [Member]      
Quantitative Lease Disclosures [Abstract]      
Remaining operating lease terms 10 years    
[1] Excludes expenses of approximately $0.4 million and $0.5 million for the three months ended March 31, 2020 and 2019, respectively, related to non-lease components such as maintenance, property taxes, etc., and operating lease expense for leases with an initial term of 12 months or less, which is not material.