Note 2 - Bank Acquisition - Unaudited Pro Forma Information (Details) - Commonwealth [Member] $ / shares in Units, shares in Thousands, $ in Thousands	3 Months Ended
	Mar. 31, 2022 USD ($) $ / shares shares
Net interest income	$ 53,793
Provision for credit losses	(2,150)	[1]
Non-interest income	22,143
Non-interest expense	47,289	[2]
Income before income tax expense	30,797
Income tax expense	6,467
Net income	24,330
Less net income attributed to non-controlling interest	51
Net income available to stockholders	$ 24,279
Basic (in dollars per share) | $ / shares	$ 0.84
Diluted (in dollars per share) | $ / shares	$ 0.83
Basic weighted average shares outstanding (in shares) | shares	29,056
Diluted weighted average shares outstanding (in shares) | shares	29,364

[1] Excludes $4.4 million in merger related credit loss expense for the three months ended March 31, 2022.

[2] Excludes $24.1 million in merger expenses for the three months ended March 31, 2022.