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Note 4 - Debt and Equity Securities (Tables) | 6 Months Ended
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Jun. 30, 2015
Investments, Debt and Equity Securities [Abstract] |
Trading Securities [Table Text Block] |
|  | Amortized Cost |  | Fair Value |  | Gross Unrealized Gains |  | Gross Unrealized Losses
|  | (In thousands)
Securites held-to-maturity: |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Municipals |  | $ | 7,220 |  |  | $ | 7,220 |  |  | $ | - |  |  | $ | - |
Total |  | $ | 7,220 |  |  | $ | 7,220 |  |  | $ | - |  |  | $ | - |
|  | Amortized Cost |  | Gross Unrealized Fair Value |  | Gross Unrealized Gains |  | Losses
|  | (In thousands)
Securites available for sale: |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Corporate |  | $ | 105,852 |  |  | $ | 104,648 |  |  | $ | 521 |  |  | $ | 1,725 |
Municipals |  |  | 136,927 |  |  |  | 139,911 |  |  |  | 3,114 |  |  |  | 130 |
Mutual funds |  |  | 21,193 |  |  |  | 21,193 |  |  |  | - |  |  |  | - |
Other |  |  | 42,004 |  |  |  | 42,071 |  |  |  | 69 |  |  |  | 2 |
Total other securities |  |  | 305,976 |  |  |  | 307,823 |  |  |  | 3,704 |  |  |  | 1,857 |
REMIC and CMO |  |  | 530,684 |  |  |  | 532,662 |  |  |  | 6,165 |  |  |  | 4,187 |
GNMA |  |  | 12,802 |  |  |  | 13,080 |  |  |  | 401 |  |  |  | 123 |
FNMA |  |  | 170,838 |  |  |  | 170,534 |  |  |  | 1,635 |  |  |  | 1,939 |
FHLMC |  |  | 13,259 |  |  |  | 13,398 |  |  |  | 139 |  |  |  | - |
Total mortgage-backed securities |  |  | 727,583 |  |  |  | 729,674 |  |  |  | 8,340 |  |  |  | 6,249 |
Total securities available for sale |  | $ | 1,033,559 |  |  | $ | 1,037,497 |  |  | $ | 12,044 |  |  | $ | 8,106 |
|  | Amortized Cost |  | Fair Value |  | Gross Unrealized Gains |  | Gross Unrealized Losses
|  | (In thousands)
Securites available for sale: |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Corporate |  | $ | 90,719 |  |  | $ | 91,273 |  |  | $ | 1,268 |  |  | $ | 714 |
Municipals |  |  | 145,864 |  |  |  | 148,896 |  |  |  | 3,093 |  |  |  | 61 |
Mutual funds |  |  | 21,118 |  |  |  | 21,118 |  |  |  | - |  |  |  | - |
Other |  |  | 7,098 |  |  |  | 7,090 |  |  |  | - |  |  |  | 8 |
Total other securities |  |  | 264,799 |  |  |  | 268,377 |  |  |  | 4,361 |  |  |  | 783 |
REMIC and CMO |  |  | 504,207 |  |  |  | 505,768 |  |  |  | 6,188 |  |  |  | 4,627 |
GNMA |  |  | 13,862 |  |  |  | 14,159 |  |  |  | 421 |  |  |  | 124 |
FNMA |  |  | 169,956 |  |  |  | 170,367 |  |  |  | 2,128 |  |  |  | 1,717 |
FHLMC |  |  | 14,505 |  |  |  | 14,639 |  |  |  | 142 |  |  |  | 8 |
Total mortgage-backed securities |  |  | 702,530 |  |  |  | 704,933 |  |  |  | 8,879 |  |  |  | 6,476 |
Total securities available for sale |  | $ | 967,329 |  |  | $ | 973,310 |  |  | $ | 13,240 |  |  | $ | 7,259 |
Other than Temporary Impairment, Credit Losses Recognized in Earnings [Table Text Block] |
|  | For the three months ended June 30, |  | For the six months ended June 30,
|  | 2015 |  | 2014 |  | 2015 |  | 2014
|  | (In thousands)
Beginning balance |  | $ | - |  |  | $ | 3,738 |  |  | $ | - |  |  | $ | 3,738 |
Recognition of actual losses |  |  | - |  |  |  | - |  |  |  | - |  |  |  | - |
OTTI charges due to credit loss recorded in earnings |  |  | - |  |  |  | - |  |  |  | - |  |  |  | - |
Securities sold during the period |  |  | - |  |  |  | - |  |  |  | - |  |  |  | - |
Securities where there is an intent to sell or requirement to sell |  |  | - |  |  |  | - |  |  |  | - |  |  |  | - |
Ending balance |  | $ | - |  |  | $ | 3,738 |  |  | $ | - |  |  | $ | 3,738 |
Schedule of Realized Gain (Loss) [Table Text Block] |
|  | For the three months ended June 30, |  | For the six months ended June 30,
|  | 2015 |  | 2014 |  | 2015 |  | 2014
|  | (In thousands)
Gross gains from the sale of securities |  | $ | 233 |  |  | $ | - |  |  | $ | 233 |  |  | $ | - |
Gross losses from the sale of securities |  |  | (169 | ) |  |  | - |  |  |  | (169 | ) |  |  | - |
Net gains from the sale of securities |  | $ | 64 |  |  | $ | - |  |  | $ | 64 |  |  | $ | - |
Investments Classified by Contractual Maturity Date [Table Text Block] |
|  | Amortized Cost |  | Fair Value
|  | (In thousands)
Securities held-to-maturity:(1) |  |  |  |  |  |  |  |
Due in one year or less |  | $ | 6,140 |  |  | $ | 6,140 |
Due after one year through five years |  |  | 1,080 |  |  |  | 1,080 |
Total securities held-to-maturity |  | $ | 7,220 |  |  | $ | 7,220 |
|  | Amortized Cost |  | Fair Value
|  | (In thousands)
Securities available for sale:(1) |  |  |  |  |  |  |  |
Due in one year or less |  | $ | 32,046 |  |  | $ | 32,232 |
Due after one year through five years |  |  | 15,000 |  |  |  | 15,298 |
Due after five years through ten years |  |  | 92,077 |  |  |  | 90,741 |
Due after ten years |  |  | 166,853 |  |  |  | 169,552 |
Total other securities |  |  | 305,976 |  |  |  | 307,823 |
Mortgage-backed securities |  |  | 727,583 |  |  |  | 729,674 |
Total securities available for sale |  | $ | 1,033,559 |  |  | $ | 1,037,497 |
Available-for-sale Securities, Continuous Unrealized Loss Position, Fair Value [Table Text Block] |
|  | Total |  | Less than 12 months |  | 12 months or more
|  | Fair Value |  | Unrealized Losses |  | Fair Value |  | Unrealized Losses |  | Fair Value |  | Unrealized Losses
|  | (In thousands)
Corporate |  | $ | 53,275 |  |  | $ | 1,725 |  |  | $ | 38,413 |  |  | $ | 1,587 |  |  | $ | 14,862 |  |  | $ | 138 |
Municipals |  |  | 17,077 |  |  |  | 130 |  |  |  | 17,077 |  |  |  | 130 |  |  |  | - |  |  |  | - |
Other |  |  | 298 |  |  |  | 2 |  |  |  | 298 |  |  |  | 2 |  |  |  | - |  |  |  | - |
Total other securities |  |  | 70,650 |  |  |  | 1,857 |  |  |  | 55,788 |  |  |  | 1,719 |  |  |  | 14,862 |  |  |  | 138 |
REMIC and CMO |  |  | 245,107 |  |  |  | 4,187 |  |  |  | 141,760 |  |  |  | 1,205 |  |  |  | 103,347 |  |  |  | 2,982 |
GNMA |  |  | 7,727 |  |  |  | 123 |  |  |  | 7,727 |  |  |  | 123 |  |  |  | - |  |  |  | - |
FNMA |  |  | 100,608 |  |  |  | 1,939 |  |  |  | 68,604 |  |  |  | 1,040 |  |  |  | 32,004 |  |  |  | 899 |
Total mortgage-backed securities |  |  | 353,442 |  |  |  | 6,249 |  |  |  | 218,091 |  |  |  | 2,368 |  |  |  | 135,351 |  |  |  | 3,881 |
Total securities available for sale |  | $ | 424,092 |  |  | $ | 8,106 |  |  | $ | 273,879 |  |  | $ | 4,087 |  |  | $ | 150,213 |  |  | $ | 4,019 |
|  | Total |  | Less than 12 months |  | 12 months or more
|  | Fair Value |  | Unrealized Losses |  | Fair Value |  | Unrealized Losses |  | Fair Value |  | Unrealized Losses
|  | (In thousands)
Corporate |  | $ | 39,287 |  |  | $ | 714 |  |  | $ | 9,573 |  |  | $ | 428 |  |  | $ | 29,714 |  |  | $ | 286 |
Municipals |  |  | 8,810 |  |  |  | 61 |  |  |  | 3,546 |  |  |  | 11 |  |  |  | 5,264 |  |  |  | 50 |
Other |  |  | 292 |  |  |  | 8 |  |  |  | - |  |  |  | - |  |  |  | 292 |  |  |  | 8 |
Total other securities |  |  | 48,389 |  |  |  | 783 |  |  |  | 13,119 |  |  |  | 439 |  |  |  | 35,270 |  |  |  | 344 |
REMIC and CMO |  |  | 216,190 |  |  |  | 4,627 |  |  |  | 77,382 |  |  |  | 399 |  |  |  | 138,808 |  |  |  | 4,228 |
GNMA |  |  | 8,358 |  |  |  | 124 |  |  |  | - |  |  |  | - |  |  |  | 8,358 |  |  |  | 124 |
FNMA |  |  | 95,148 |  |  |  | 1,717 |  |  |  | - |  |  |  | - |  |  |  | 95,148 |  |  |  | 1,717 |
FHLMC |  |  | 6,773 |  |  |  | 8 |  |  |  | 6,773 |  |  |  | 8 |  |  |  | - |  |  |  | - |
Total mortgage-backed securities |  |  | 326,469 |  |  |  | 6,476 |  |  |  | 84,155 |  |  |  | 407 |  |  |  | 242,314 |  |  |  | 6,069 |
Total securities available for sale |  | $ | 374,858 |  |  | $ | 7,259 |  |  | $ | 97,274 |  |  | $ | 846 |  |  | $ | 277,584 |  |  | $ | 6,413 |

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