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Bank segment (HEI only) - Derivative Financial Instruments (Details) - USD ($)
$ in Thousands
12 Months Ended
Dec. 31, 2022
Dec. 31, 2021
Dec. 31, 2020
Derivative instrument      
Net gains (losses) recognized in the Statement of Income $ (600) $ (3,409) $ 3,781
Derivative, gain (loss), statement of income or comprehensive income Revenues Revenues Revenues
Not Designated as Hedging Instrument      
Derivative instrument      
Asset derivatives $ 27 $ 638  
Liability derivatives 0 11  
Interest rate lock commitments      
Derivative instrument      
Notional amount 1,720 39,377  
Fair value 9 638  
Interest rate lock commitments | Not Designated as Hedging Instrument      
Derivative instrument      
Asset derivatives 9 638  
Liability derivatives 0 0  
Net gains (losses) recognized in the Statement of Income (629) (3,898) $ 4,239
Forward commitments      
Derivative instrument      
Notional amount 1,500 38,000  
Fair value 18 (11)  
Forward commitments | Not Designated as Hedging Instrument      
Derivative instrument      
Asset derivatives 18 0  
Liability derivatives 0 11  
Net gains (losses) recognized in the Statement of Income $ 29 $ 489 $ (458)