Note 4 - Securities (Tables)
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3 Months Ended |
Mar. 31, 2017 |
Notes Tables |
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Unrealized Gain (Loss) on Investments [Table Text Block] |
| | Amortized Cost | | Gross Unrealized Gain | | Gross Unrealized Loss | | Fair Value | March 31, 2017 | | (In Thousands) | Available for sale debt securities | | | | | | | | | | | | | | | | | U.S. Treasury and government sponsored agencies | | $ | | | | $ | | | | $ | | ) | | $ | | | Mortgage-backed securities | | | | | | | | | | | | ) | | | | | State and municipal securities | | | | | | | | | | | | ) | | | | | Corporate debt | | | | | | | | | | | | | | | | | Total | | $ | | | | $ | | | | $ | | ) | | $ | | | Held to maturity debt securities | | | | | | | | | | | | | | | | | Mortgage-backed securities | | $ | | | | $ | | | | $ | | ) | | $ | | | State and municipal securities | | | | | | | | | | | | ) | | | | | Corporate debt | | | | | | | | | | | | ) | | | | | Total | | $ | | | | $ | | | | $ | | ) | | $ | | | | | | | | | | | | | | | | | | | | December 31, 2016 | | | | | | | | | | | | | | | | | Available for sale debt securities | | | | | | | | | | | | | | | | | U.S. Treasury and government sponsored agencies | | $ | | | | $ | | | | $ | | ) | | $ | | | Mortgage-backed securities | | | | | | | | | | | | ) | | | | | State and municipal securities | | | | | | | | | | | | ) | | | | | Corporate debt | | | | | | | | | | | | | | | | | Total | | $ | | | | $ | | | | $ | | ) | | $ | | | Held to maturity debt securities | | | | | | | | | | | | | | | | | Mortgage-backed securities | | $ | | | | $ | | | | $ | | ) | | $ | | | State and municipal securities | | | | | | | | | | | | ) | | | | | Corporate debt | | | | | | | | | | | | ) | | | | | Total | | $ | | | | $ | | | | $ | | ) | | $ | | |
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Fair Value, Assets Measured on Recurring Basis [Table Text Block] |
| | March 31, 2017 | | December 31, 2016 | | | Amortized Cost | | Fair Value | | Amortized Cost | | Fair Value | | | (In thousands) | Available for sale debt securities | | | | | | | | | | | | | | | | | Due within one year | | $ | | | | $ | | | | $ | | | | $ | | | Due from one to five years | | | | | | | | | | | | | | | | | Due from five to ten years | | | | | | | | | | | | | | | | | Mortgage-backed securities | | | | | | | | | | | | | | | | | | | $ | | | | $ | | | | $ | | | | $ | | | | | | | | | | | | | | | | | | | | Held to maturity debt securities | | | | | | | | | | | | | | | | | Due from one to five years | | $ | | | | $ | | | | $ | | | | $ | | | Due from five to ten years | | | | | | | | | | | | | | | | | Due after ten years | | | | | | | | | | | | | | | | | Mortgage-backed securities | | | | | | | | | | | | | | | | | | | $ | | | | $ | | | | $ | | | | $ | | |
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Gain (Loss) on Investments [Table Text Block] |
| | Less Than Twelve Months | | Twelve Months or More | | Total | | | Gross | | | | Gross | | | | Gross | | | | | Unrealized | | | | Unrealized | | | | Unrealized | | | | | Losses | | Fair Value | | Losses | | Fair Value | | Losses | | Fair Value | | | (In Thousands) | March 31, 2017: | | | | | | | | | | | | | | | | | | | | | | | | | U.S. Treasury and government sponsored agencies | | $ | (106 | ) | | $ | 7,902 | | | $ | - | | | $ | - | | | $ | (106 | ) | | $ | 7,902 | | Mortgage-backed securities | | | (2,424 | ) | | | 188,130 | | | | - | | | | - | | | | (2,424 | ) | | | 188,130 | | State and municipal securities | | | (263 | ) | | | 36,644 | | | | (11 | ) | | | 1,412 | | | | (274 | ) | | | 38,056 | | Corporate debt | | | (16 | ) | | | 3,030 | | | | - | | | | - | | | | (16 | ) | | | 3,030 | | Total | | $ | (2,809 | ) | | $ | 235,706 | | | $ | (11 | ) | | $ | 1,412 | | | $ | (2,820 | ) | | $ | 237,118 | | | | | | | | | | | | | | | | | | | | | | | | | | | December 31, 2016: | | | | | | | | | | | | | | | | | | | | | | | | | U.S. Treasury and government sponsored agencies | | $ | (126 | ) | | $ | 10,865 | | | $ | - | | | $ | - | | | $ | (126 | ) | | $ | 10,865 | | Mortgage-backed securities | | | (3,413 | ) | | | 174,225 | | | | - | | | | - | | | | (3,413 | ) | | | 174,225 | | State and municipal securities | | | (698 | ) | | | 64,502 | | | | (8 | ) | | | 1,021 | | | | (706 | ) | | | 65,523 | | Corporate debt | | | (15 | ) | | | 3,034 | | | | - | | | | - | | | | (15 | ) | | | 3,034 | | Total | | $ | (4,252 | ) | | $ | 252,626 | | | $ | (8 | ) | | $ | 1,021 | | | $ | (4,260 | ) | | $ | 253,647 | |
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