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Note 7 - Deposits (Tables) | 12 Months Ended
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Dec. 31, 2020
Notes Tables |
Summary of Deposits [Table Text Block] |
|  | As of December 31, |
|  | 2020 |  |  | 2019 |
|  | (In thousands) |
Demand |  | $ | 3,365,086 |  |  | $ | 2,871,444 |
NOW accounts |  |  | 1,926,135 |  |  |  | 1,358,152 |
Money market accounts |  |  | 3,359,191 |  |  |  | 2,260,764 |
Saving accounts |  |  | 785,672 |  |  |  | 758,903 |
Time deposits |  |  | 6,673,317 |  |  |  | 7,443,045 |
Total |  | $ | 16,109,401 |  |  | $ | 14,692,308 |
Schedule of Maturities for Time Deposits [Table Text Block] |
|  | Expected Maturity Date at December 31, |  |  |  |  |
|  | 2021 |  |  | 2022 |  |  | 2023 |  |  | 2024 |  |  | 2025 |  |  | Thereafter |  |  | Total |
|  | (In thousands) |
Time deposits |  | $ | 6,507,616 |  |  | $ | 107,311 |  |  | $ | 58,261 |  |  | $ | 69 |  |  | $ | 48 |  |  | $ | 12 |  |  | $ | 6,673,317 |
Summary of Interest Expense on Deposits [Table Text Block] |
|  | Year Ended December 31, |
|  | 2020 |  |  | 2019 |  |  | 2018 |
|  | (In thousands) |
Interest bearing demand |  | $ | 2,816 |  |  | $ | 2,371 |  |  | $ | 2,718 |
Money market accounts |  |  | 21,574 |  |  |  | 21,508 |  |  |  | 16,202 |
Saving accounts |  |  | 1,006 |  |  |  | 1,432 |  |  |  | 1,583 |
Time deposits |  |  | 111,629 |  |  |  | 152,791 |  |  |  | 86,368 |
Total |  | $ | 137,025 |  |  | $ | 178,102 |  |  | $ | 106,871 |

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