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Leases (Details) - USD ($)
$ in Thousands
 3 Months Ended 9 Months Ended
Sep. 30, 2021
Sep. 30, 2020
Sep. 30, 2021
Sep. 30, 2020
Dec. 31, 2020
Quantitative Lease Disclosures [Abstract]          
Renewal option period 5 years   5 years    
Assets [Abstract]          
Operating lease right-of-use assets $ 42,458   $ 42,458   $ 29,958
Liabilities [Abstract]          
Sundry payables and accrued expenses 10,476   10,476   8,719
Noncurrent operating lease liabilities 33,246   33,246   22,450
Total operating lease liabilities $ 43,722   $ 43,722   $ 31,169
Operating Leases [Abstract]          
Weighted average remaining lease term 5 years 4 months 24 days   5 years 4 months 24 days   5 years
Weighted average discount rate 3.00%   3.00%   3.60%
Lease Expense [Abstract]          
Operating lease expense [1] $ 2,547 $ 2,290 $ 7,324 $ 6,906  
Excluded expenses of non lease 300 $ 700 1,200 1,600  
Cash Paid for the amounts included in the measurement of lease liabilities [Abstract]          
Operating cash flows from operating leases     7,271 6,810  
Right-of-use assets obtained in exchange for new lease obligations [Abstract]          
Operating leases     19,215 $ 611  
Minimum Lease Payments [Abstract]          
2021 2,723   2,723    
2022 10,422   10,422    
2023 9,441   9,441    
2024 7,128   7,128    
2025 5,802   5,802    
Thereafter 11,664   11,664    
Total lease payments 47,180   47,180    
Less: Interest (3,458)   (3,458)    
Total operating lease liabilities $ 43,722   $ 43,722   $ 31,169
Maximum [Member]          
Quantitative Lease Disclosures [Abstract]          
Remaining operating lease terms 10 years   10 years    
[1] Excludes expenses of approximately $0.3 million and $1.2 million for the three and nine months ended September 30, 2021, respectively, and approximately $0.7 million and $1.6 million for the comparable periods in 2020, 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.