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Note 8 - Deposits (Tables) | 12 Months Ended
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Dec. 31, 2017
Notes Tables |
Summary of Deposits [Table Text Block] |
|  | As of December 31, |
|  | 201 7 |  |  | 201 6 |
|  | (In thousands ) |
Demand |  | $ | 2,783,127 |  |  | $ | 2,478,107 |
NOW accounts |  |  | 1,410,519 |  |  |  | 1,230,445 |
Money market accounts |  |  | 2,248,271 |  |  |  | 2,198,938 |
Saving accounts |  |  | 857,199 |  |  |  | 719,949 |
Time deposits |  |  | 5,390,777 |  |  |  | 5,047,287 |
Total |  | $ | 12,689,893 |  |  | $ | 11,674,726 |
Schedule of Maturities for Time Deposits [Table Text Block] |
|  |  | Expected Maturity Date at December 31 , |  |  |  |  |
|  |  | 201 8 |  |  | 201 9 |  |  | 202 0 |  |  | 202 1 |  |  | 202 2 |  |  | Thereafte r |  |  | Tota l |
| (In thousands ) |
Time deposits |  | $ | 4,724,089 |  |  | $ | 532,188 |  |  | $ | 133,824 |  |  | $ | 73 |  |  | $ | 592 |  |  | $ | 11 |  |  | $ | 5,390,777 |
Summary of Interest Expense on Deposits [Table Text Block] |
|  | Year Ended December 31 , |
|  | 201 7 |  |  | 201 6 |  |  | 201 5 |
|  | (In thousands ) |
Interest bearing demand |  | $ | 2,242 |  |  | $ | 1,740 |  |  | $ | 1,406 |
Money market accounts |  |  | 15,062 |  |  |  | 13,308 |  |  |  | 10,138 |
Saving accounts |  |  | 1,772 |  |  |  | 1,046 |  |  |  | 901 |
Time deposits |  |  | 46,768 |  |  |  | 43,327 |  |  |  | 39,443 |
Total |  | $ | 65,844 |  |  | $ | 59,421 |  |  | $ | 51,888 |

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