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Deferred tax reconciliation (Details 5) - USD ($)
$ in Thousands
 12 Months Ended
Dec. 31, 2022
Dec. 31, 2021
Dec. 31, 2020
Income Tax Disclosure [Abstract]      
Change in net deferred income tax liability from the preceding table $ 39,341    
Deferred taxes associated with other comprehensive loss (3,507)    
Excess deferred income tax amortization (9,008)    
Other (3,500)    
Deferred income taxes $ 23,326 $ 60,250 $ (1,801)