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Leases (Details) - USD ($)
$ in Thousands
 12 Months Ended
Dec. 31, 2020
Dec. 31, 2019
Components of Lease Expense [Abstract]    
Operating lease cost $ 30,710 $ 30,225
Short-term lease cost 1,454 1,212
Variable lease cost 5,752 6,074
Total lease cost [1] 37,916 37,511
Supplemental Information Related to Leases [Abstract]    
Cash paid for amounts included in the measurement of operating lease liabilities 30,307 30,077
Right-of-use assets obtained in exchange for new operating lease liabilities [2] 32,710 $ 113,222
Future Lease Payments for Operating Leases [Abstract]    
2021 29,819  
2022 23,861  
2023 17,787  
2024 11,487  
2025 and therafter 12,294  
Total lease payments 95,248  
Less: imputed interest 5,751  
Total operating lease liabilities $ 89,497  
Average Lease Terms and Discount Rates [Abstract]    
Weighted-average remaining lease term - Operating leases 4 years 18 days 4 years 18 days
Weighted-average discount rate - Operating leases 3.10% 3.90%
ASU 2016-02 [Member]    
Future Lease Payments for Operating Leases [Abstract]    
Total operating lease liabilities $ 82,600  
Maximum [Member]    
Operating Lease [Abstract]    
Lease term 5 years  
[1] Sublease income was immaterial
[2] Includes the right-of-use assets obtained in exchange for lease liabilities for the year 2019 - $82.6 million which were recognized upon adoption of ASC Topic 842 at January 1, 2019.