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Shareholders' Equity (Narrative) (Details) - USD ($)
$ / shares in Units, $ in Thousands
 3 Months Ended 9 Months Ended
Sep. 30, 2023
Mar. 31, 2023
Sep. 30, 2022
Jun. 30, 2022
Mar. 31, 2022
Sep. 30, 2023
Sep. 30, 2022
Dec. 31, 2022
Equity [Abstract]                
Common shares, shares authorized (in shares) 100,000,000         100,000,000   100,000,000
Preferred stock, shares authorized (in shares) 50,000,000         50,000,000   50,000,000
Cash dividends declared per common share (in usd per share) $ 0 $ 0.05 $ 0.05 $ 0.05 $ 0.05 $ 0.05 $ 0.15  
Dividend declared   $ 2,700         $ 8,100  
Total authorizations which remain available for use $ 55,900         $ 55,900    
Common shares acquired (in shares)           3,100,000 139,000,000,000  
Common shares, at cost 30,517   $ 3,252     $ 50,488 $ 3,252  
Deferred tax (benefit) expense included in OCI $ (8,200)   $ (24,400)     $ (200) $ (92,200)