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CONSOLIDATED STATEMENTS OF CONDITION (Parenthetical) - USD ($) $ in Thousands | Dec. 31, 2021 | Dec. 31, 2020
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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

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