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Note 4 - Debt and Equity Securities (Tables) | 9 Months Ended
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Sep. 30, 2016
Notes Tables |
Trading Securities [Table Text Block] |
|  | Amortized Cost |  | Fair Value |  | Gross Unrealized Gains |  | Gross Unrealized Losses
|  | (In thousands)
Securites held-to-maturity: |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Municipals |  | $ | 33,274 |  |  | $ | 33,410 |  |  | $ | 136 |  |  | $ | - |
Total |  | $ | 33,274 |  |  | $ | 33,410 |  |  | $ | 136 |  |  | $ | - |
|  | Amortized Cost |  | Fair Value |  | Gross Unrealized Gains |  | Gross Unrealized Losses
|  | (In thousands)
Securites held-to-maturity: |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Municipals |  | $ | 6,180 |  |  | $ | 6,180 |  |  | $ | - |  |  | $ | - |
Total |  | $ | 6,180 |  |  | $ | 6,180 |  |  | $ | - |  |  | $ | - |
|  | Amortized Cost |  | Fair Value |  | Gross Unrealized Gains |  | Gross Unrealized Losses
|  | (In thousands) |  |
Corporate |  | $ | 110,000 |  |  | $ | 104,011 |  |  | $ | 191 |  |  | $ | 6,180 |
Municipals |  |  | 125,667 |  |  |  | 130,380 |  |  |  | 4,713 |  |  |  | - |
Mutual funds |  |  | 21,658 |  |  |  | 21,658 |  |  |  | - |  |  |  | - |
Collateralized loan obligations |  |  | 101,660 |  |  |  | 102,572 |  |  |  | 920 |  |  |  | 8 |
Other |  |  | 7,193 |  |  |  | 7,191 |  |  |  | - |  |  |  | 2 |
Total other securities |  |  | 366,178 |  |  |  | 365,812 |  |  |  | 5,824 |  |  |  | 6,190 |
REMIC and CMO |  |  | 383,912 |  |  |  | 389,426 |  |  |  | 6,144 |  |  |  | 630 |
GNMA |  |  | 7,520 |  |  |  | 7,700 |  |  |  | 180 |  |  |  | - |
FNMA |  |  | 129,791 |  |  |  | 132,831 |  |  |  | 3,085 |  |  |  | 45 |
FHLMC |  |  | 14,802 |  |  |  | 15,110 |  |  |  | 308 |  |  |  | - |
Total mortgage-backed securities |  |  | 536,025 |  |  |  | 545,067 |  |  |  | 9,717 |  |  |  | 675 |
Total securities available for sale |  | $ | 902,203 |  |  | $ | 910,879 |  |  | $ | 15,541 |  |  | $ | 6,865 |
|  | Amortized Cost |  | Fair Value |  | Gross Unrealized Gains |  | Gross Unrealized Losses
|  | (In thousands) |  |
Corporate |  | $ | 115,976 |  |  | $ | 111,674 |  |  | $ | 134 |  |  | $ | 4,436 |
Municipals |  |  | 127,696 |  |  |  | 131,583 |  |  |  | 3,887 |  |  |  | - |
Mutual funds |  |  | 21,290 |  |  |  | 21,290 |  |  |  | - |  |  |  | - |
Collateralized loan obligations |  |  | 53,225 |  |  |  | 52,898 |  |  |  | - |  |  |  | 327 |
Other |  |  | 7,214 |  |  |  | 7,212 |  |  |  | - |  |  |  | 2 |
Total other securities |  |  | 325,401 |  |  |  | 324,657 |  |  |  | 4,021 |  |  |  | 4,765 |
REMIC and CMO |  |  | 469,987 |  |  |  | 469,936 |  |  |  | 3,096 |  |  |  | 3,147 |
GNMA |  |  | 11,635 |  |  |  | 11,798 |  |  |  | 302 |  |  |  | 139 |
FNMA |  |  | 170,327 |  |  |  | 170,057 |  |  |  | 1,492 |  |  |  | 1,762 |
FHLMC |  |  | 16,961 |  |  |  | 16,949 |  |  |  | 87 |  |  |  | 99 |
Total mortgage-backed securities |  |  | 668,910 |  |  |  | 668,740 |  |  |  | 4,977 |  |  |  | 5,147 |
Total securities available for sale |  | $ | 994,311 |  |  | $ | 993,397 |  |  | $ | 8,998 |  |  | $ | 9,912 |
Investments Classified by Contractual Maturity Date [Table Text Block] |
|  | Amortized Cost |  | Fair Value
|  | (In thousands)
Due in one year or less |  | $ | 11,370 |  |  | $ | 11,370 |
Due after one year through five years |  |  | 40 |  |  |  | 40 |
Due after ten years |  |  | 21,864 |  |  |  | 22,000 |
Total securities held-to-maturity |  | $ | 33,274 |  |  | $ | 33,410 |
|  | Amortized Cost |  | Fair Value
|  | (In thousands)
Due in one year or less |  | $ | - |  |  | $ | - |
Due after one year through five years |  |  | 1,795 |  |  |  | 1,821 |
Due after five years through ten years |  |  | 118,691 |  |  |  | 117,707 |
Due after ten years |  |  | 224,034 |  |  |  | 224,626 |
Total other securities |  |  | 344,520 |  |  |  | 344,154 |
Mutual funds |  |  | 21,658 |  |  |  | 21,658 |
Mortgage-backed securities |  |  | 536,025 |  |  |  | 545,067 |
Total securities available for sale |  | $ | 902,203 |  |  | $ | 910,879 |
Available-for-sale Securities, Continuous Unrealized Loss Position, Fair Value [Table Text Block] |
|  |  |  | Total |  | Less than 12 months |  | 12 months or more
|  | Count |  | Fair Value |  | Unrealized Losses |  | Fair Value |  | Unrealized Losses |  | Fair Value |  | Unrealized Losses
|  |  |  | (Dollars in thousands) |  |
Corporate |  |  | 13 |  |  | $ | 93,820 |  |  | $ | 6,180 |  |  | $ | 19,294 |  |  | $ | 706 |  |  | $ | 74,526 |  |  | $ | 5,474 |
Collateralized loan obligations |  |  | 1 |  |  |  | 7,474 |  |  |  | 8 |  |  |  | - |  |  |  | - |  |  |  | 7,474 |  |  |  | 8 |
Other |  |  | 1 |  |  |  | 299 |  |  |  | 2 |  |  |  | - |  |  |  | - |  |  |  | 299 |  |  |  | 2 |
Total other securities |  |  | 15 |  |  |  | 101,593 |  |  |  | 6,190 |  |  |  | 19,294 |  |  |  | 706 |  |  |  | 82,299 |  |  |  | 5,484 |
REMIC and CMO |  |  | 11 |  |  |  | 55,603 |  |  |  | 630 |  |  |  | 19,707 |  |  |  | 131 |  |  |  | 35,896 |  |  |  | 499 |
FNMA |  |  | 1 |  |  |  | 6,694 |  |  |  | 45 |  |  |  | - |  |  |  | - |  |  |  | 6,694 |  |  |  | 45 |
Total mortgage-backed securities |  |  | 12 |  |  |  | 62,297 |  |  |  | 675 |  |  |  | 19,707 |  |  |  | 131 |  |  |  | 42,590 |  |  |  | 544 |
Total securities available for sale |  |  | 27 |  |  | $ | 163,890 |  |  | $ | 6,865 |  |  | $ | 39,001 |  |  | $ | 837 |  |  | $ | 124,889 |  |  | $ | 6,028 |
|  |  |  | Total |  | Less than 12 months |  | 12 months or more
|  | Count |  | Fair Value |  | Unrealized Losses |  | Fair Value |  | Unrealized Losses |  | Fair Value |  | Unrealized Losses
|  |  |  | (Dollars in thousands) |  |
Corporate |  |  | 12 |  |  | $ | 85,563 |  |  | $ | 4,436 |  |  | $ | 76,218 |  |  | $ | 3,782 |  |  | $ | 9,345 |  |  | $ | 654 |
Collateralized loan obligations |  |  | 7 |  |  |  | 52,898 |  |  |  | 327 |  |  |  | 52,898 |  |  |  | 327 |  |  |  | - |  |  |  | - |
Other |  |  | 1 |  |  |  | 298 |  |  |  | 2 |  |  |  | - |  |  |  | - |  |  |  | 298 |  |  |  | 2 |
Total other securities |  |  | 20 |  |  |  | 138,759 |  |  |  | 4,765 |  |  |  | 129,116 |  |  |  | 4,109 |  |  |  | 9,643 |  |  |  | 656 |
REMIC and CMO |  |  | 33 |  |  |  | 238,132 |  |  |  | 3,147 |  |  |  | 182,010 |  |  |  | 1,642 |  |  |  | 56,122 |  |  |  | 1,505 |
GNMA |  |  | 1 |  |  |  | 6,977 |  |  |  | 139 |  |  |  | 6,977 |  |  |  | 139 |  |  |  | - |  |  |  | - |
FNMA |  |  | 20 |  |  |  | 102,225 |  |  |  | 1,762 |  |  |  | 75,769 |  |  |  | 1,043 |  |  |  | 26,456 |  |  |  | 719 |
FHLMC |  |  | 3 |  |  |  | 14,715 |  |  |  | 99 |  |  |  | 14,715 |  |  |  | 99 |  |  |  | - |  |  |  | - |
Total mortgage-backed securities |  |  | 57 |  |  |  | 362,049 |  |  |  | 5,147 |  |  |  | 279,471 |  |  |  | 2,923 |  |  |  | 82,578 |  |  |  | 2,224 |
Total securities available for sale |  |  | 77 |  |  | $ | 500,808 |  |  | $ | 9,912 |  |  | $ | 408,587 |  |  | $ | 7,032 |  |  | $ | 92,221 |  |  | $ | 2,880 |
Schedule of Realized Gain (Loss) [Table Text Block] |
|  | For the three months ended September 30, |  | For the nine months ended September 30,
|  | 2016 |  | 2015 |  | 2016 |  | 2015
|  | (In thousands)
Gross gains from the sale of securities |  | $ | - |  |  | $ | 2,666 |  |  | $ | 2,370 |  |  | $ | 2,899 |
Gross losses from the sale of securities |  |  | - |  |  |  | (2,563 | ) |  |  | (7 | ) |  |  | (2,732 | )
Net gains from the sale of securities |  | $ | - |  |  | $ | 103 |  |  | $ | 2,363 |  |  | $ | 167 |

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