Note 22 - Parent Corporation Only Financial Statements - Condensed Statements of Cash Flows (Details) - USD ($) $ in Thousands	3 Months Ended								12 Months Ended
	Dec. 31, 2024	Sep. 30, 2024	Jun. 30, 2024	Mar. 31, 2024	Dec. 31, 2023	Sep. 30, 2023	Jun. 30, 2023	Mar. 31, 2023	Dec. 31, 2024	Dec. 31, 2023	Dec. 31, 2022
Segment consolidated net income	$ 20,371	$ 17,161	$ 19,056	$ 17,205	$ 19,273	$ 21,407	$ 21,394	$ 24,929	$ 73,793	$ 87,003	$ 125,211
(Gain) loss on equity securities, net									(2)	117	1,521
Amortization of subordinated debt issuance costs									505	1,184	304
(Increase) decrease in other assets									8,691	(7,514)	(12,413)
Decrease in other liabilities									(40,118)	(9,248)	48,322
Net cash provided by (used in) operating activities									60,700	92,891	176,777
Net cash used in investing activities									55,151	(248,038)	(1,543,232)
Cash dividends paid on preferred stock									(6,036)	(6,036)	(6,037)
Cash dividends paid on common stock									(27,281)	(25,912)	(23,428)
Proceeds from exercise of stock options									0	96	124
Net cash used in financing activities									(2,077)	129,546	1,369,234
Increase (decrease) increase in cash and cash equivalents									113,774	(25,601)	2,779
Cash and cash equivalents at beginning of period				242,714				268,315	242,714	268,315	265,536
Cash and cash equivalents at end of period	356,488				242,714				356,488	242,714	268,315
Parent Company [Member]
Segment consolidated net income									73,793	87,003	125,211
Equity in undistributed earnings of subsidiary									(33,072)	(41,691)	(96,026)
(Gain) loss on equity securities, net									(164)	131	45
Amortization of subordinated debt issuance costs									505	1,184	304
(Increase) decrease in other assets									(3)	699	0
Decrease in other liabilities									(122)	(1,384)	(14)
Net cash provided by (used in) operating activities									40,937	45,942	29,520
Payments for investments and advances in subsidiaries									0	(32,250)	0
Repayment of investments and advances in subsidiaries									0	32,250	0
Purchases of equity securities									(1,533)	(2,870)	(3,538)
Net cash used in investing activities									(1,533)	(2,870)	(3,538)
Repayment of subordinated debt									0	(75,000)	0
Cash dividends paid on preferred stock									(6,036)	(6,036)	(6,037)
Cash dividends paid on common stock									(27,281)	(25,912)	(23,428)
Purchase of treasury stock									(5,820)	(17,497)	(13,127)
Proceeds from exercise of stock options									0	96	124
Net cash used in financing activities									(39,137)	(124,349)	(42,468)
Increase (decrease) increase in cash and cash equivalents									267	(81,277)	(16,486)
Cash and cash equivalents at beginning of period				$ 35,885				$ 117,162	35,885	117,162	133,648
Cash and cash equivalents at end of period	$ 36,152				$ 35,885				$ 36,152	$ 35,885	$ 117,162