Note 3 - Acquisitions - Fair Values of Assets Acquired and Liabilities Assumed (Details) - USD ($) $ in Thousands					12 Months Ended
	Jul. 10, 2021	Dec. 15, 2020	Apr. 24, 2020	Jan. 01, 2020	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2022
Cash consideration					$ 9,807	$ 48,920
Goodwill resulting from acquisition	$ 10,331				$ 55,300		$ 55,300
As Recorded by Summit [Member]
Cash consideration	9,807	$ 21,705	$ 12,965	$ 14,250
Total consideration	9,807	21,705	12,965	29,691
Cash and cash equivalents	946	13,030	800	60,284
Cash and cash equivalents, estimated fair value adjustments	0	0	0	0
Purchased performing	53,918	122,786	33,942	38,153
Purchased performing, estimated fair value adjustments	478	(968)	(1,185)	188
Purchased credit deteriorated	397	0		1,308
Purchased credit deteriorated, estimated fair value adjustments	(91)	0		(569)
Premises and equipment	3,302	144	2,334	664
Premises and equipment, estimated fair value adjustments	(129)	(27)	(42)	(142)
Core deposit intangibles	178	81	125	717
Core deposit intangibles, estimated fair value adjustments	178	81	125	717
Other assets	260	6,375	114	4,250
Other assets, estimated fair value adjustments	0	477	0	(74)
Total identifiable assets acquired	59,001	144,194	37,315	195,414
Total identifiable assets acquired, estimated fair value adjustments	436	759	(1,102)	385
Deposits	164,040	104,664	188,732	173,266
Deposits, estimated fair value adjustments	959	1,065	598	239
Other liabilities	45	270	102	3,279
Other liabilities, estimated fair value adjustments	0	0	0	(7)
Total identifiable liabilities assumed	164,085	129,216	188,834	176,545
Total identifiable liabilities assumed, estimated fair value adjustments	959	1,762	598	232
Net liabilities assumed	(105,084)	14,978	(151,519)	18,869
Net liabilities assumed, estimated fair value adjustments	(523)	(1,003)	(1,700)	153
Goodwill resulting from acquisition		6,727	14,665	10,822
Securities available for sale, at fair value		1,632		90,028
Securities available for sale, at fair value, estimated fair value adjustments		19		(47)
Allowance for credit losses on loans		0		0
Allowance for credit losses on loans, estimated fair value adjustments		1,227		312
Property held for sale		146		10
Property held for sale, estimated fair value adjustments		(50)		0
Short-term borrowings		3,000
Short-term borrowings, estimated fair value adjustments		0
Long-term borrowings		21,282
Long-term borrowings, estimated fair value adjustments		697
Stock consideration				15,441
WinFirst Financial Corp [Member]
Total consideration		21,700
Cash and cash equivalents		13,030
Purchased performing		123,754
Purchased credit deteriorated		0
Premises and equipment		171
Core deposit intangibles		0
Other assets		5,898
Total identifiable assets acquired		143,435
Deposits		103,599
Other liabilities		270
Total identifiable liabilities assumed		127,454
Net liabilities assumed		15,981
Goodwill resulting from acquisition		6,730
Securities available for sale, at fair value		1,613
Allowance for credit losses on loans		(1,227)
Property held for sale		196
Short-term borrowings		3,000
Long-term borrowings		$ 20,585
MVB [Member]
Total consideration	9,800
Cash and cash equivalents	946		800
Purchased performing	53,440		35,127
Purchased credit deteriorated	488
Premises and equipment	3,431		2,376
Core deposit intangibles	0		0
Other assets	260		114
Total identifiable assets acquired	58,565		38,417
Deposits	163,081		188,134
Other liabilities	45		102
Total identifiable liabilities assumed	163,126		188,236
Net liabilities assumed	(104,561)		(149,819)
Net cash received from MVB	94,753		$ 136,854
Goodwill resulting from acquisition	$ 10,330
Cornerstone Financial Services Inc [Member]
Cash consideration				14,300
Total consideration				15,400
Cash and cash equivalents				60,284
Purchased performing				37,965
Purchased credit deteriorated				1,877
Premises and equipment				806
Core deposit intangibles				0
Other assets				4,324
Total identifiable assets acquired				195,029
Deposits				173,027
Other liabilities				3,286
Total identifiable liabilities assumed				176,313
Net liabilities assumed				18,716
Goodwill resulting from acquisition				10,820
Securities available for sale, at fair value				90,075
Allowance for credit losses on loans				(312)
Property held for sale				$ 10