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New accounting pronouncements (Details) - USD ($)
$ in Thousands
Dec. 31, 2021
Dec. 31, 2020
Jan. 01, 2020
Dec. 31, 2019
Jan. 01, 2019
Dec. 31, 2018
New Accounting Pronouncements or Change in Accounting Principle [Line Items]            
Cumulative effect adjustment $ 1,849,541 $ 1,910,528   $ 1,815,705   $ 1,772,278
Reduction to deferred tax liabilities (70,482) (86,018)        
Right of Use Asset-Operating Leases 268,390 296,020        
Lease liability 279,472          
Impact of new accounting pronouncements            
New Accounting Pronouncements or Change in Accounting Principle [Line Items]            
Cumulative effect adjustment       (209)   (6,771)
Impact of new accounting pronouncements | ASU 2016-13            
New Accounting Pronouncements or Change in Accounting Principle [Line Items]            
Allowance for doubtful accounts     $ 279      
Reduction to deferred tax liabilities     70      
Impact of new accounting pronouncements | ASU 2016-02            
New Accounting Pronouncements or Change in Accounting Principle [Line Items]            
Reduction to deferred tax liabilities         $ 1,508  
Right of Use Asset-Operating Leases         336,083  
Lease liability         344,362  
Retained Earnings            
New Accounting Pronouncements or Change in Accounting Principle [Line Items]            
Cumulative effect adjustment $ 2,070,005 $ 2,335,216   2,301,532   2,188,115
Retained Earnings | Impact of new accounting pronouncements            
New Accounting Pronouncements or Change in Accounting Principle [Line Items]            
Cumulative effect adjustment       $ (209)   $ (6,771)
Retained Earnings | Impact of new accounting pronouncements | ASU 2016-13            
New Accounting Pronouncements or Change in Accounting Principle [Line Items]            
Cumulative effect adjustment     $ 209      
Retained Earnings | Impact of new accounting pronouncements | ASU 2016-02            
New Accounting Pronouncements or Change in Accounting Principle [Line Items]            
Cumulative effect adjustment         $ 6,771