Note 2 - Debt Securities (Tables)
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12 Months Ended |
Dec. 31, 2018 |
Notes Tables |
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Unrealized Gain (Loss) on Investments [Table Text Block] |
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Amortized
Cost
| | Gross Unrealized Gain | | Gross Unrealized Loss | |
Market
Value
| December 31, 2018 | | | Securities Available for Sale | | | | | | | | | U.S. Treasury and government sponsored agencies | | $ | 77,534 | | | $ | 78 | | | $ | (619 | ) | | $ | 76,993 | | Mortgage-backed securities | | | 309,244 | | | | 591 | | | | (5,531 | ) | | | 304,304 | | State and municipal securities | | | 106,465 | | | | 208 | | | | (679 | ) | | | 105,994 | | Corporate debt | | | 102,982 | | | | 668 | | | | (757 | ) | | | 102,893 | | Total | | $ | 596,225 | | | $ | 1,545 | | | $ | (7,586 | ) | | $ | 590,184 | | | | | | | | | | | | | | | | | | | December 31, 2017 | | | | | | | | | | | | | | | | | Securities Available for Sale | | | | | | | | | | | | | | | | | U.S. Treasury and government sponsored agencies | | $ | 55,567 | | | $ | 38 | | | $ | (249 | ) | | $ | 55,356 | | Mortgage-backed securities | | | 278,177 | | | | 1,006 | | | | (2,685 | ) | | | 276,498 | | State and municipal securities | | | 134,641 | | | | 761 | | | | (553 | ) | | | 134,849 | | Corporate debt | | | 69,996 | | | | 1,416 | | | | (35 | ) | | | 71,377 | | Total | | $ | 538,381 | | | $ | 3,221 | | | $ | (3,522 | ) | | $ | 538,080 | | Securities Held to Maturity | | | | | | | | | | | | | | | | | State and municipal securities | | | 250 | | | | - | | | | - | | | | 250 | | Total | | $ | 250 | | | $ | - | | | $ | - | | | $ | 250 | |
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Fair Value, Assets Measured on Recurring Basis [Table Text Block] |
| | December 31, 2018 | | December 31, 2017 | | | | Amortized Cost | | | | Market Value | | | | Amortized Cost | | | | Market Value | | | | (In Thousands) | Debt securities available for sale | | | | | | | | | | | | | | | | | Due within one year | | $ | 38,343 | | | $ | 38,225 | | | $ | 22,122 | | | $ | 22,172 | | Due from one to five years | | | 167,873 | | | | 166,380 | | | | 160,773 | | | | 160,563 | | Due from five to ten years | | | 77,811 | | | | 78,276 | | | | 73,362 | | | | 74,684 | | Due after ten years | | | 2,954 | | | | 2,999 | | | | 3,947 | | | | 4,163 | | Mortgage-backed securities | | | 309,244 | | | | 304,304 | | | | 278,177 | | | | 276,498 | | | | $ | 596,225 | | | $ | 590,184 | | | $ | 538,381 | | | $ | 538,080 | | | | | | | | | | | | | | | | | | | Debt securities held to maturity | | | | | | | | | | | | | | | | | Due from one to five years | | $ | - | | | $ | - | | | $ | 250 | | | $ | 250 | | | | $ | - | | | $ | - | | | $ | 250 | | | $ | 250 | |
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Gain (Loss) on Securities [Table Text Block] |
| | Less Than Twelve Months | | Twelve Months or More | | Total | | | | Gross Unrealized Losses | | |
| Fair Value | | | | Gross Unrealized Losses | | |
| Fair Value | | | | Gross Unrealized Losses | | |
| Fair Value | | | | (In Thousands) | December 31, 2018 | | | | | | | | | | | | | U.S. Treasury and government sponsored agencies | | $ | (8 | ) | | $ | 1,001 | | | $ | (611 | ) | | $ | 50,878 | | | $ | (619 | ) | | $ | 51,879 | | Mortgage-backed securities | | | (539 | ) | | | 67,721 | | | | (4,992 | ) | | | 204,260 | | | | (5,531 | ) | | | 271,981 | | State and municipal securities | | | (101 | ) | | | 20,821 | | | | (578 | ) | | | 52,190 | | | | (679 | ) | | | 73,011 | | Corporate debt | | | (315 | ) | | | 36,245 | | | | (442 | ) | | | 13,474 | | | | (757 | ) | | | 49,719 | | Total | | $ | (963 | ) | | $ | 125,788 | | | $ | (6,623 | ) | | $ | 320,802 | | | $ | (7,586 | ) | | $ | 446,590 | | | | | | | | | | | | | | | | | | | | | | | | | | | December 31, 2017 | | | | | | | | | | | | | | | | | | | | | | | | | U.S. Treasury and government sponsored agencies | | $ | (151 | ) | | $ | 33,401 | | | $ | (98 | ) | | $ | 2,926 | | | $ | (249 | ) | | $ | 36,327 | | Mortgage-backed securities | | | (986 | ) | | | 140,432 | | | | (1,699 | ) | | | 75,903 | | | | (2,685 | ) | | | 216,335 | | State and municipal securities | | | (450 | ) | | | 66,637 | | | | (103 | ) | | | 6,648 | | | | (553 | ) | | | 73,285 | | Corporate debt | | | (35 | ) | | | 6,955 | | | | - | | | | - | | | | (35 | ) | | | 6,955 | | Total | | $ | (1,622 | ) | | $ | 247,425 | | | $ | (1,900 | ) | | $ | 85,477 | | | $ | (3,522 | ) | | $ | 332,902 | |
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Available-for-sale Securities [Table Text Block] |
| | Years Ended December 31, | | | 2018 | | 2017 | | 2016 | | | (In Thousands) | Sale proceeds | | $ | 5,736 | | | $ | 3,500 | | | $ | 6,085 | | Gross realized gains | | $ | 15 | | | $ | - | | | $ | 4 | | Gross realized losses | | | - | | | | - | | | | (7 | ) | Net realized gain (loss) | | $ | 15 | | | $ | - | | | $ | (3 | ) |
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