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Note 11 - Stockholders' Equity and Earnings Per Share (Tables) | 12 Months Ended
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Dec. 31, 2021
Notes Tables |
Schedule of Accumulated Other Comprehensive Income (Loss) [Table Text Block] |
|  | 2021 |  |  | 2020 |
|  | Pre-tax |  |  | Tax expense/ (benefit) |  |  | Net-of-tax |  |  | Pre-tax |  |  | Tax expense/ (benefit) |  |  | Net-of-tax |
|  | (In thousands) |
Beginning balance, loss, net of tax |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Securities available-for-sale |  |  |  |  |  |  |  |  |  | $ | 12,200 |  |  |  |  |  |  |  |  |  |  | $ | 5,714 |
Cash flow hedge derivatives |  |  |  |  |  |  |  |  |  |  | (6,890 | ) |  |  |  |  |  |  |  |  |  |  | (3,412 | )
Total |  |  |  |  |  |  |  |  |  | $ | 5,310 |  |  |  |  |  |  |  |  |  |  | $ | 2,302 |
Net unrealized gains/(losses) arising during the period |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Securities available-for-sale |  | $ | (16,167 | ) |  | $ | (4,779 | ) |  | $ | (11,388 | ) |  | $ | 10,903 |  |  | $ | 3,223 |  |  | $ | 7,680 |
Cash flow hedge derivatives |  |  | 5,131 |  |  |  | 1,517 |  |  |  | 3,614 |  |  |  | (4,938 | ) |  |  | (1,460 | ) |  |  | (3,478 | )
Total |  |  | (11,036 | ) |  |  | (3,262 | ) |  |  | (7,774 | ) |  |  | 5,965 |  |  |  | 1,763 |  |  |  | 4,202 |
Reclassification adjustment for net gains in net income |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Securities available-for-sale |  |  | (853 | ) |  |  | (252 | ) |  |  | (601 | ) |  |  | (1,695 | ) |  |  | (501 | ) |  |  | (1,194 | )
Cash flow hedge derivatives |  |  | — |  |  |  | — |  |  |  | — |  |  |  | — |  |  |  | — |  |  |  | — |
Total |  |  | (853 | ) |  |  | (252 | ) |  |  | (601 | ) |  |  | (1,695 | ) |  |  | (501 | ) |  |  | (1,194 | )
Total other comprehensive income/(loss) |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Securities available-for-sale |  |  | (17,020 | ) |  |  | (5,031 | ) |  |  | (11,989 | ) |  |  | 9,208 |  |  |  | 2,722 |  |  |  | 6,486 |
Cash flow hedge derivatives |  |  | 5,131 |  |  |  | 1,517 |  |  |  | 3,614 |  |  |  | (4,938 | ) |  |  | (1,460 | ) |  |  | (3,478 | )
Total |  | $ | (11,889 | ) |  | $ | (3,514 | ) |  | $ | (8,375 | ) |  | $ | 4,270 |  |  | $ | 1,262 |  |  | $ | 3,008 |
Ending balance, gain/(loss), net of tax |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Securities available-for-sale |  |  |  |  |  |  |  |  |  | $ | 211 |  |  |  |  |  |  |  |  |  |  | $ | 12,200 |
Cash flow hedge derivatives |  |  |  |  |  |  |  |  |  |  | (3,276 | ) |  |  |  |  |  |  |  |  |  |  | (6,890 | )
Total |  |  |  |  |  |  |  |  |  | $ | (3,065 | ) |  |  |  |  |  |  |  |  |  | $ | 5,310 |
Schedule of Earnings Per Share, Basic and Diluted [Table Text Block] |
|  | Year Ended December 31, |
|  | 2021 |  |  | 2020 |  |  | 2019 |
|  |  |  |  |  |  |  |  |  | Per |  |  |  |  |  |  |  |  |  |  | Per |  |  |  |  |  |  |  |  |  |  | Per |
|  | Income |  |  | Shares |  |  | Share |  |  | Income |  |  | Shares |  |  | Share |  |  | Income |  |  | Shares |  |  | Share |
|  | (Numerator) |  |  | (Denominator) |  |  | Amount |  |  | (Numerator) |  |  | (Denominator) |  |  | Amount |  |  | (Numerator) |  |  | (Denominator) |  |  | Amount |
|  | (In thousands, except shares and per share data) |
Net income |  | $ | 298,304 |  |  |  |  |  |  |  |  |  |  | $ | 228,860 |  |  |  |  |  |  |  |  |  |  | $ | 279,135 |  |  |  |  |  |  |  |  |
Basic EPS, income |  | $ | 298,304 |  |  |  | 78,268,369 |  |  | $ | 3.81 |  |  | $ | 228,860 |  |  |  | 79,584,560 |  |  | $ | 2.88 |  |  | $ | 279,135 |  |  |  | 79,999,703 |  |  | $ | 3.49 |
Effect of dilutive stock options and RSU |  |  |  | 302,269 |  |  |  |  |  |  |  |  |  |  |  | 193,287 |  |  |  |  |  |  |  |  |  |  |  | 248,190 |  |  |  |  |
Diluted EPS, income |  | $ | 298,304 |  |  |  | 78,570,638 |  |  | $ | 3.80 |  |  | $ | 228,860 |  |  |  | 79,777,847 |  |  | $ | 2.87 |  |  | $ | 279,135 |  |  |  | 80,247,893 |  |  | $ | 3.48 |

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