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Note 22 - Business Segment Information - Intercompany Eliminations (Details) - Intersegment Eliminations - Commercial Banking - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2024	Dec. 31, 2023	Dec. 31, 2022
Equity in net income of subsidiary bank	$ 140,197	$ 137,451	$ 128,940
Investment in subsidiary bank	1,259,571	1,122,803	965,973
QCBT
Equity in net income of subsidiary bank	22,430	21,766	33,850
Investment in subsidiary bank	280,945	260,160	238,631
CRBT
Equity in net income of subsidiary bank	72,061	72,378	53,576
Investment in subsidiary bank	423,857	353,299	277,812
CSB
Equity in net income of subsidiary bank	19,566	18,027	17,225
Investment in subsidiary bank	173,133	153,838	122,826
GB
Equity in net income of subsidiary bank	26,140	25,280	24,289
Investment in subsidiary bank	$ 381,636	$ 355,506	$ 326,704

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+ References

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+ References

Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
-Topic 210
-SubTopic 10
-Name Accounting Standards Codification
-Section S99
-Paragraph 1
-Subparagraph (SX 210.5-02(18))
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147480566/210-10-S99-1

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