CONSOLIDATED STATEMENTS OF CONDITION (Parenthetical) - USD ($) $ in Thousands	Jun. 30, 2022	Dec. 31, 2021
Statement of Financial Position [Abstract]
Available-for-sale securities, at amortized cost	$ 2,075,020	$ 2,063,790
Securities - held-to-maturity	274,660	282,288
Equity securities, at amortized cost	$ 818	$ 902
Common stock, par value (in dollars per share)	$ 0.10	$ 0.10
Common stock, authorized (in shares)	25,000,000	25,000,000
Common stock, issued (in shares)	14,540,514	14,696,911
Treasury stock, shares (in shares)	123,030	124,709