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Note 21 - Parent Company Financial Information - Condensed Statements of Cash Flows (Details) - USD ($) $ in Thousands | 3 Months Ended | 12 Months Ended
--- | --- | ---
Dec. 31, 2022 | Sep. 30, 2022 | Jun. 30, 2022 | Mar. 31, 2022 | Dec. 31, 2021 | Sep. 30, 2021 | Jun. 30, 2021 | Mar. 31, 2021 | Dec. 31, 2022 | Dec. 31, 2021 | Dec. 31, 2020
Net income | $ 12,583 | $ 13,351 | $ 11,213 | $ 9,515 | $ 10,555 | $ 12,608 | $ 13,403 | $ 14,602 | $ 46,662 | $ 51,168 | $ 35,926
Decrease (increase) in other operating activities |  |  |  |  |  |  |  |  | 3,671 | 1,300 | (6,662)
Net cash provided by operating activities |  |  |  |  |  |  |  |  | 59,024 | 48,215 | 45,844
Investing activities |  |  |  |  |  |  |  |  |  |  |
Payments to acquire securities available for sale |  |  |  |  |  |  |  |  | (269,337) | (22,394) | (10,267)
Net cash provided by investing activities |  |  |  |  |  |  |  |  | (536,779) | 35,350 | 17,798
Financing activities |  |  |  |  |  |  |  |  |  |  |
Payments for repurchase of common stock |  |  |  |  |  |  |  |  | 21,311 | 28,882 | 21,872
Payments of common stock dividends |  |  |  |  |  |  |  |  | (18,515) | (18,059) | (17,876)
Net Cash Provided by (Used in) Financing Activities, Total |  |  |  |  |  |  |  |  | (28,838) | 137,313 | 175,910
Cash and cash equivalents increase (decrease) |  |  |  |  |  |  |  |  | (506,593) | 220,878 | 239,552
Cash and cash equivalents at beginning of period |  |  |  | 677,439 |  |  |  | 456,561 | 677,439 | 456,561 | 217,009
Cash and cash equivalents at end of period | 170,846 |  |  |  | 677,439 |  |  |  | 170,846 | 677,439 | 456,561
Parent Company [Member] |  |  |  |  |  |  |  |  |  |  |
Net income |  |  |  |  |  |  |  |  | 46,662 | 51,168 | 35,926
Decrease (increase) in other operating activities |  |  |  |  |  |  |  |  | 8,442 | 253 | 1,047
Net cash provided by operating activities |  |  |  |  |  |  |  |  | 55,104 | 51,421 | 36,973
Investing activities |  |  |  |  |  |  |  |  |  |  |
Payments to acquire securities available for sale |  |  |  |  |  |  |  |  | (19,372) | 0 | 0
Proceeds from maturities, calls, sales of investment securities |  |  |  |  |  |  |  |  | 11,807 | (9,919) | 0
Dividends in excess of undistributed net income of subsidiaries |  |  |  |  |  |  |  |  | 0 | 1,305 | (13,284)
Net cash provided by investing activities |  |  |  |  |  |  |  |  | (7,565) | (8,614) | (13,284)
Financing activities |  |  |  |  |  |  |  |  |  |  |
Proceeds from issuance of common stock |  |  |  |  |  |  |  |  | 172 | 0 | 0
Payments for repurchase of common stock |  |  |  |  |  |  |  |  | (21,311) | (28,882) | (21,872)
Payments of common stock dividends |  |  |  |  |  |  |  |  | (18,515) | (18,059) | (17,876)
Net change in other financing activities |  |  |  |  |  |  |  |  | 1,375 | 1,773 | 2,150
Net Cash Provided by (Used in) Financing Activities, Total |  |  |  |  |  |  |  |  | (38,279) | (45,168) | (37,598)
Cash and cash equivalents increase (decrease) |  |  |  |  |  |  |  |  | 9,260 | (2,361) | (13,909)
Cash and cash equivalents at beginning of period |  |  |  | $ 7,728 |  |  |  | $ 10,089 | 7,728 | 10,089 | 23,998
Cash and cash equivalents at end of period | $ 16,988 |  |  |  | $ 7,728 |  |  |  | $ 16,988 | $ 7,728 | $ 10,089

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