CONDENSED CONSOLIDATED STATEMENTS OF CONDITION (Parenthetical) - USD ($) $ in Thousands |
Jun. 30, 2019 |
Dec. 31, 2018 |
|---|---|---|
| Statement of Financial Position [Abstract] | ||
| Available-for-sale securities, at amortized cost | $ 1,190,869 | $ 1,363,902 |
| Held-to-maturity securities, at fair value | 143,548 | 139,377 |
| Equity Securities, at amortized cost | $ 1,000 | $ 1,000 |
| Common Stock, par value (in dollars per share) | $ 0.1 | $ 0.1 |
| Common Stock, authorized (in shares) | 25,000,000 | 25,000,000 |
| Common Stock, issued (in shares) | 15,196,629 | 15,348,287 |
| Treasury stock, shares (in shares) | 119,784 | 122,227 |