Note 21 - Parent Corporation Only Financial Statements - 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	$ 32,557	$ 28,915	$ 32,358	$ 31,381	$ 33,038	$ 32,097	$ 32,219	$ 32,999	$ 125,211	$ 130,353	$ 71,289
Loss on equity securities, net									1,521	373	(202)
Amortization of subordinated debt issuance costs									304	303	323
Decrease (increase) in other assets									(12,413)	46,086	(22,498)
Decrease in other liabilities									48,322	10,526	(4,174)
Net cash provided by (used in) operating activities									176,777	202,273	81,125
Net cash used in investing activities									(1,543,232)	(689,860)	(323,365)
Cash dividends paid on preferred stock									(6,037)	(1,717)	0
Cash dividends paid on common stock									(23,428)	(17,493)	(14,317)
Proceeds from preferred stock offering									0	110,927	0
Proceeds from exercise of stock options									124	106	233
Net cash (used in) provided by financing activities									1,369,234	449,367	344,513
Decrease (increase) in cash and cash equivalents									2,779	(38,220)	102,273
Cash and cash equivalents at beginning of period				265,536				303,756	265,536	303,756	201,483
Cash and cash equivalents at end of period	268,315				265,536				268,315	265,536	303,756
Parent Company [Member]
Net income									125,211	130,353	71,289
Equity in undistributed earnings of subsidiary									(96,026)	(113,396)	(63,669)
Loss on equity securities, net									45	55	0
Amortization of subordinated debt issuance costs									304	303	323
Decrease (increase) in other assets									0	50,590	(50,001)
Decrease in other liabilities									(14)	(287)	(391)
Net cash provided by (used in) operating activities									29,520	67,618	(42,449)
Sale of equity securities									(3,538)	(780)	0
Repayment of short-term borrowing									0	0	(3,000)
Net cash used in investing activities									(3,538)	(780)	(3,000)
Proceeds from (repayment of) proceeds from subordinated debt									0	(50,000)	73,440
Cash dividends paid on preferred stock									(6,037)	(1,717)	0
Cash dividends paid on common stock									(23,428)	(17,493)	(14,317)
Purchase of treasury stock									(13,127)	(9,401)	(911)
Proceeds from preferred stock offering									0	110,927	0
Proceeds from exercise of stock options									124	106	233
Net cash (used in) provided by financing activities									(42,468)	32,422	58,445
Decrease (increase) in cash and cash equivalents									(16,486)	99,260	12,996
Cash and cash equivalents at beginning of period				$ 133,648				$ 34,388	133,648	34,388	21,392
Cash and cash equivalents at end of period	$ 117,162				$ 133,648				$ 117,162	$ 133,648	$ 34,388