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Income Taxes (Details) - USD ($)
$ in Thousands
 12 Months Ended
Dec. 31, 2022
Dec. 31, 2021
Dec. 31, 2020
Current tax expense      
Current period $ 48,808 $ 102,297 $ 13,599
Adjustment for prior periods (2,723) 12 (363)
Current tax expense (income) and adjustments for current tax of prior periods 46,085 102,309 13,236
Deferred tax expense      
Origination and reversal of temporary differences (5,742) 310 370
Investment tax credits and operating loss carryforward 755 8,038 (1,894)
Deferred tax expense (income) (4,987) 8,348 (1,524)
Total income tax expense $ 41,098 $ 110,657 $ 11,712