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Note 4 - Debt and Equity Securities (Tables) | 6 Months Ended
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Jun. 30, 2017
Notes Tables |
Trading Securities [Table Text Block] |
|  |  |  |  |  | Gross |  | Gross
|  | Amortized |  |  |  | Unrealized |  | Unrealized
|  | Cost |  | Fair Value |  | Gains |  | Losses
|  | (In thousands)
Securities held-to-maturity: |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Municipals |  | $ | 24,451 |  |  | $ | 22,777 |  |  | $ | - |  |  | $ | 1,674 |
Total other securities |  |  | 24,451 |  |  |  | 22,777 |  |  |  | - |  |  |  | 1,674 |
FNMA |  |  | 7,983 |  |  |  | 7,816 |  |  |  | - |  |  |  | 167 |
Total mortgage-backed securities |  |  | 7,983 |  |  |  | 7,816 |  |  |  | - |  |  |  | 167 |
Total |  | $ | 32,434 |  |  | $ | 30,593 |  |  | $ | - |  |  | $ | 1,841 |
|  |  |  |  |  | Gross |  | Gross
|  | Amortized |  |  |  | Unrealized |  | Unrealized
|  | Cost |  | Fair Value |  | Gains |  | Losses
|  | (In thousands)
Securities held-to-maturity: |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Municipals |  | $ | 37,735 |  |  | $ | 35,408 |  |  | $ | - |  |  | $ | 2,327 |
Total |  | $ | 37,735 |  |  | $ | 35,408 |  |  | $ | - |  |  | $ | 2,327 |
|  |  |  |  |  | Gross |  | Gross
|  | Amortized |  |  |  | Unrealized |  | Unrealized
|  | Cost |  | Fair Value |  | Gains |  | Losses
Securities available for sale: |  | (In thousands)
Corporate |  | $ | 110,000 |  |  | $ | 103,191 |  |  | $ | - |  |  | $ | 6,809 |
Municipals |  |  | 123,606 |  |  |  | 126,596 |  |  |  | 2,990 |  |  |  | - |
Mutual funds |  |  | 21,563 |  |  |  | 21,563 |  |  |  | - |  |  |  | - |
Collateralized loan obligations |  |  | 58,379 |  |  |  | 58,899 |  |  |  | 520 |  |  |  | - |
Other |  |  | 7,444 |  |  |  | 7,444 |  |  |  | - |  |  |  | - |
Total other securities |  |  | 320,992 |  |  |  | 317,693 |  |  |  | 3,510 |  |  |  | 6,809 |
REMIC and CMO |  |  | 409,049 |  |  |  | 408,926 |  |  |  | 2,248 |  |  |  | 2,371 |
GNMA |  |  | 1,153 |  |  |  | 1,248 |  |  |  | 95 |  |  |  | - |
FNMA |  |  | 105,011 |  |  |  | 104,736 |  |  |  | 540 |  |  |  | 815 |
FHLMC |  |  | 5,131 |  |  |  | 5,102 |  |  |  | 24 |  |  |  | 53 |
Total mortgage-backed securities |  |  | 520,344 |  |  |  | 520,012 |  |  |  | 2,907 |  |  |  | 3,239 |
Total |  | $ | 841,336 |  |  | $ | 837,705 |  |  | $ | 6,417 |  |  | $ | 10,048 |
|  |  |  |  |  | Gross |  | Gross
|  | Amortized |  |  |  | Unrealized |  | Unrealized
|  | Cost |  | Fair Value |  | Gains |  | Losses
Securities available for sale: |  | (In thousands)
Corporate |  | $ | 110,000 |  |  | $ | 102,910 |  |  | $ | - |  |  | $ | 7,090 |
Municipals |  |  | 124,984 |  |  |  | 126,903 |  |  |  | 1,983 |  |  |  | 64 |
Mutual funds |  |  | 21,366 |  |  |  | 21,366 |  |  |  | - |  |  |  | - |
Collateralized loan obligations |  |  | 85,470 |  |  |  | 86,365 |  |  |  | 895 |  |  |  | - |
Other |  |  | 7,363 |  |  |  | 7,361 |  |  |  | - |  |  |  | 2 |
Total other securities |  |  | 349,183 |  |  |  | 344,905 |  |  |  | 2,878 |  |  |  | 7,156 |
REMIC and CMO |  |  | 402,636 |  |  |  | 401,370 |  |  |  | 1,607 |  |  |  | 2,873 |
GNMA |  |  | 1,319 |  |  |  | 1,427 |  |  |  | 108 |  |  |  | - |
FNMA |  |  | 109,493 |  |  |  | 108,351 |  |  |  | 463 |  |  |  | 1,605 |
FHLMC |  |  | 5,378 |  |  |  | 5,328 |  |  |  | 35 |  |  |  | 85 |
Total mortgage-backed securities |  |  | 518,826 |  |  |  | 516,476 |  |  |  | 2,213 |  |  |  | 4,563 |
Total |  | $ | 868,009 |  |  | $ | 861,381 |  |  | $ | 5,091 |  |  | $ | 11,719 |
Investments Classified by Contractual Maturity Date [Table Text Block] |
|  | Amortized |  |
Securities held-to-maturity: |  | Cost |  | Fair Value
|  | (In thousands)
Due in one year or less |  | $ | 2,585 |  |  | $ | 2,585 |
Due after ten years |  |  | 21,866 |  |  |  | 20,192 |
Total other securities |  |  | 24,451 |  |  |  | 22,777 |
Mortgage-backed securities |  |  | 7,983 |  |  |  | 7,816 |
Total |  | $ | 32,434 |  |  | $ | 30,593 |
|  | Amortized |  |
Securities available for sale: |  | Cost |  | Fair Value
|  | (In thousands)
Due in one year or less |  | $ | - |  |  | $ | - |
Due after one year through five years |  |  | 1,751 |  |  |  | 1,762 |
Due after five years through ten years |  |  | 123,872 |  |  |  | 120,810 |
Due after ten years |  |  | 173,806 |  |  |  | 173,558 |
Mutual funds |  |  | 21,563 |  |  |  | 21,563 |
Total other securities |  |  | 320,992 |  |  |  | 317,693 |
Mortgage-backed securities |  |  | 520,344 |  |  |  | 520,012 |
Total |  | $ | 841,336 |  |  | $ | 837,705 |
Available-for-sale Securities, Continuous Unrealized Loss Position, Fair Value [Table Text Block] |
|  | At June 30, 2017
|  |  |  | Total |  | Less than 12 months |  | 12 months or more
|  |  |  |  |  | Unrealized |  |  |  | Unrealized |  |  |  | Unrealized
|  | Count |  | Fair Value |  | Losses |  | Fair Value |  | Losses |  | Fair Value |  | Losses
|  | (Dollars in thousands)
Held-to-maturity securities |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Municipals |  |  | 1 |  |  | $ | 20,192 |  |  | $ | 1,674 |  |  | $ | 20,192 |  |  | $ | 1,674 |  |  | $ | - |  |  | $ | - |
Total other securities |  |  | 1 |  |  |  | 20,192 |  |  |  | 1,674 |  |  |  | 20,192 |  |  |  | 1,674 |  |  |  | - |  |  |  | - |
FNMA |  |  | 1 |  |  |  | 7,816 |  |  |  | 167 |  |  |  | 7,816 |  |  |  | 167 |  |  |  | - |  |  |  | - |
Total mortgage-backed securities |  |  | 1 |  |  |  | 7,816 |  |  |  | 167 |  |  |  | 7,816 |  |  |  | 167 |  |  |  | - |  |  |  | - |
Total |  |  | 2 |  |  | $ | 28,008 |  |  | $ | 1,841 |  |  | $ | 28,008 |  |  | $ | 1,841 |  |  | $ | - |  |  | $ | - |
Available for sale securities |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Corporate |  |  | 14 |  |  | $ | 103,191 |  |  | $ | 6,809 |  |  | $ | 9,475 |  |  | $ | 525 |  |  | $ | 93,716 |  |  | $ | 6,284 |
Total other securities |  |  | 14 |  |  |  | 103,191 |  |  |  | 6,809 |  |  |  | 9,475 |  |  |  | 525 |  |  |  | 93,716 |  |  |  | 6,284 |
REMIC and CMO |  |  | 31 |  |  |  | 188,993 |  |  |  | 2,371 |  |  |  | 176,158 |  |  |  | 1,815 |  |  |  | 12,835 |  |  |  | 556 |
FNMA |  |  | 14 |  |  |  | 52,826 |  |  |  | 815 |  |  |  | 47,153 |  |  |  | 605 |  |  |  | 5,673 |  |  |  | 210 |
FHLMC |  |  | 1 |  |  |  | 3,981 |  |  |  | 53 |  |  |  | 3,981 |  |  |  | 53 |  |  |  | - |  |  |  | - |
Total mortgage-backed securities |  |  | 46 |  |  |  | 245,800 |  |  |  | 3,239 |  |  |  | 227,292 |  |  |  | 2,473 |  |  |  | 18,508 |  |  |  | 766 |
Total |  |  | 60 |  |  | $ | 348,991 |  |  | $ | 10,048 |  |  | $ | 236,767 |  |  | $ | 2,998 |  |  | $ | 112,224 |  |  | $ | 7,050 |
|  | At December 31, 2016
|  |  |  | Total |  | Less than 12 months |  | 12 months or more
|  |  |  |  |  | Unrealized |  |  |  | Unrealized |  |  |  | Unrealized
|  | Count |  | Fair Value |  | Losses |  | Fair Value |  | Losses |  | Fair Value |  | Losses
|  | (Dollars in thousands)
Held-to-maturity securities |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Municipals |  |  | 1 |  |  | $ | 19,538 |  |  | $ | 2,327 |  |  | $ | 19,538 |  |  | $ | 2,327 |  |  | $ | - |  |  | $ | - |
Total |  |  | 1 |  |  | $ | 19,538 |  |  | $ | 2,327 |  |  | $ | 19,538 |  |  | $ | 2,327 |  |  | $ | - |  |  | $ | - |
Available for sale securities |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Corporate |  |  | 14 |  |  | $ | 102,910 |  |  | $ | 7,090 |  |  | $ | 28,476 |  |  | $ | 1,524 |  |  | $ | 74,434 |  |  | $ | 5,566 |
Municipals |  |  | 4 |  |  |  | 16,047 |  |  |  | 64 |  |  |  | 16,047 |  |  |  | 64 |  |  |  | - |  |  |  | - |
Other |  |  | 1 |  |  |  | 298 |  |  |  | 2 |  |  |  | - |  |  |  | - |  |  |  | 298 |  |  |  | 2 |
Total other securities |  |  | 19 |  |  |  | 119,255 |  |  |  | 7,156 |  |  |  | 44,523 |  |  |  | 1,588 |  |  |  | 74,732 |  |  |  | 5,568 |
REMIC and CMO |  |  | 35 |  |  |  | 222,807 |  |  |  | 2,873 |  |  |  | 208,827 |  |  |  | 2,268 |  |  |  | 13,980 |  |  |  | 605 |
FNMA |  |  | 18 |  |  |  | 80,924 |  |  |  | 1,605 |  |  |  | 74,972 |  |  |  | 1,250 |  |  |  | 5,952 |  |  |  | 355 |
FHLMC |  |  | 1 |  |  |  | 3,993 |  |  |  | 85 |  |  |  | 3,993 |  |  |  | 85 |  |  |  | - |  |  |  | - |
Total mortgage-backed securities |  |  | 54 |  |  |  | 307,724 |  |  |  | 4,563 |  |  |  | 287,792 |  |  |  | 3,603 |  |  |  | 19,932 |  |  |  | 960 |
Total |  |  | 73 |  |  | $ | 426,979 |  |  | $ | 11,719 |  |  | $ | 332,315 |  |  | $ | 5,191 |  |  | $ | 94,664 |  |  | $ | 6,528 |
Schedule of Realized Gain (Loss) [Table Text Block] |
|  | For the three months ended |  | For the six months ended
|  | June 30, |  | June 30,
|  | 2017 |  | 2016 |  | 2017 |  | 2016
|  | (In thousands)
Gross gains from the sale of securities |  | $ | - |  |  | $ | 2,370 |  |  | $ | - |  |  | $ | 2,370 |
Gross losses from the sale of securities |  |  | - |  |  |  | (7 | ) |  |  | - |  |  |  | (7 | )
Net gains from the sale of securities |  | $ | - |  |  | $ | 2,363 |  |  | $ | - |  |  | $ | 2,363 |

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