CONSOLIDATED STATEMENTS OF CONDITION (Parenthetical) - USD ($) $ in Thousands	Dec. 31, 2021	Dec. 31, 2020
Statement of Financial Position [Abstract]
Available-for-sale securities, amortized cost	$ 2,063,790	$ 1,599,894
Securities - held-to-maturity	282,288	0
Equity securities, amortized cost	$ 902	$ 929
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)	14,696,911	14,964,389
Treasury stock, shares (in shares)	122,824	124,849