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Note 11 - Other Borrowings and Subordinated Debentures (Tables) | 12 Months Ended
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Dec. 31, 2017
Notes Tables |
Schedule of Debt [Table Text Block] |
(In thousands) |  | 2017 |  | 2016
Other Borrowings |  |  |  |  |  |  |  |
FHLB advances, net of discount, due 2018 to 2033, 1.20% to 7.37% secured by residential real estate loans |  | $ | 1,261,642 |  |  | $ | 225,230 |
Revolving credit agreement, due 10/5/2018, floating rate of 1.50% above the one month LIBOR rate, unsecured |  |  | 75,000 |  |  |  | -- |
Notes payable, due 10/15/2020, 3.85%, fixed rate, unsecured |  |  | 43,382 |  |  |  | 47,929 |
Total other borrowings |  |  | 1,380,024 |  |  |  | 273,159 |
Subordinated Debentures |  |  |  |  |  |  |  |
Trust preferred securities, due 12/30/2033, floating rate of 2.80% above the three month LIBOR rate, reset quarterly, callable without penalty |  |  | 20,620 |  |  |  | 20,620 |
Trust preferred securities, net of discount, due 6/30/2035, floating rate of 1.75% above the three month LIBOR rate, reset quarterly, callable without penalty |  |  | 9,327 |  |  |  | 9,225 |
Trust preferred securities, net of discount, due 9/15/2037, floating rate of 1.37% above the three month LIBOR rate, reset quarterly |  |  | 10,284 |  |  |  | 10,130 |
Trust preferred securities, net of discount, due 12/5/2033, floating rate of 2.88% above the three month LIBOR rate, reset quarterly, callable without penalty |  |  | 5,156 |  |  |  | 5,161 |
Trust preferred securities, net of discount, due 10/18/2034, floating rate of 2.00% above the three month LIBOR rate, reset quarterly, callable without penalty |  |  | 5,148 |  |  |  | 5,105 |
Trust preferred securities, net of discount, due 6/6/2037, floating rate of 1.57% above the three month LIBOR rate, reset quarterly, callable without penalty |  |  | 10,288 |  |  |  | 10,156 |
Trust preferred securities, due 12/15/2035, floating rate of 1.45% above the three month LIBOR rate, reset quarterly, callable without penalty |  |  | 6,702 |  |  |  | -- |
Trust preferred securities, due 6/26/2033, floating rate of 3.10% above the three month LIBOR rate, reset quarterly, callable without penalty |  |  | 20,619 |  |  |  | -- |
Trust preferred securities, due 10/7/2033, floating rate of 2.85% above the three month LIBOR rate, reset quarterly, callable without penalty |  |  | 25,774 |  |  |  | -- |
Trust preferred securities, due 9/15/2037, floating rate of 2.00% above the three month LIBOR rate, reset quarterly, callable without penalty |  |  | 8,248 |  |  |  | -- |
Other subordinated debentures, net of discount, due 9/30/2023, floating rate equal to daily average of prime rate, reset quarterly |  |  | 18,399 |  |  |  | -- |
Total subordinated debentures |  |  | 140,565 |  |  |  | 60,397 |
Total other borrowings and subordinated debentures |  | $ | 1,520,589 |  |  | $ | 333,556 |
Schedule of Maturities of Long-term Debt [Table Text Block] |
Year |  | (In thousands)
2018 |  | $ | 23,093 |
2019 |  |  | 7,486 |
2020 |  |  | 36,222 |
2021 |  |  | 2,165 |
2022 |  |  | 1,314 |
Thereafter |  |  | 148,307 |
Total |  | $ | 218,587 |

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- Definition Tabular disclosure of the combined aggregate amount of maturities and sinking fund requirements for all long-term borrowings for each of the five years following the date of the latest balance sheet date presented. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 470 -SubTopic 10 -Section 50 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=6802200&loc=d3e1835-112601 + Details
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