Consolidated Balance Sheets (Parenthetical) - USD ($) $ in Thousands	Dec. 31, 2022	Dec. 31, 2021
Statement of Financial Position [Abstract]
Debt Securities, Available-for-sale, Amortized Cost	$ 1,854,852	$ 1,727,363
Preferred Stock, Shares Authorized	200,000	200,000
Preferred Stock, Shares Issued	0	0
Common Stock, No Par Value	$ 0	$ 0
Common Stock, Shares Authorized	20,000,000	20,000,000
Common Stock, Shares, Issued	17,623,104	17,623,118
Treasury Stock, Shares	1,359,521	1,403,555