Minimum Regulatory Capital Requirements (Details) $ in Thousands	Mar. 31, 2026 USD ($)	Dec. 31, 2025 USD ($)
Statistical Disclosure for Banks [Abstract]
Capital conservation buffer	2.50%
Consolidated
Actual
CET1 (to risk weighted assets)	$ 564,073	$ 544,988
CET1 (to risk weighted assets), ratio	0.0897	0.0921
Tier 1 Capital (to risk weighted assets)	$ 594,052	$ 574,967
Tier 1 Capital (to risk weighted assets), ratio	0.0945	0.0972
Total Capital (to risk weighted assets)	$ 719,136	$ 678,300
Total Capital (to risk weighted assets), ratio	0.1144	0.1147
Tier 1 capital (to average assets)	$ 594,052	$ 574,967
Tier 1 capital (to average assets), ratio	0.0945	0.0824
For Capital Adequacy Purposes
CET1 (to risk weighted assets)	$ 282,892	$ 266,226
CET1 (to risk weighted assets), ratio	4.50%	4.50%
Tier 1 Capital (to risk weighted assets)	$ 377,189	$ 354,968
Tier 1 Capital (to risk weighted assets), ratio	0.0600	0.0600
Total Capital (to risk weighted assets)	$ 502,919	$ 473,290
Total Capital (to risk weighted assets), ratio	0.0800	0.0800
Tier 1 capital (to average assets)	$ 280,835	$ 279,168
Tier 1 capital (to average assets), ratio	0.0400	0.0400
Northpointe Bank
Actual
CET1 (to risk weighted assets)	$ 684,674	$ 663,255
CET1 (to risk weighted assets), ratio	0.1089	0.1121
Tier 1 Capital (to risk weighted assets)	$ 684,674	$ 663,255
Tier 1 Capital (to risk weighted assets), ratio	0.1089	0.1121
Total Capital (to risk weighted assets)	$ 694,758	$ 671,588
Total Capital (to risk weighted assets), ratio	0.1105	0.1135
Tier 1 capital (to average assets)	$ 684,674	$ 663,255
Tier 1 capital (to average assets), ratio	0.1089	0.0950
For Capital Adequacy Purposes
CET1 (to risk weighted assets)	$ 282,882	$ 266,213
CET1 (to risk weighted assets), ratio	4.50%	4.50%
Tier 1 Capital (to risk weighted assets)	$ 377,176	$ 354,951
Tier 1 Capital (to risk weighted assets), ratio	0.0600	0.0600
Total Capital (to risk weighted assets)	$ 502,902	$ 473,268
Total Capital (to risk weighted assets), ratio	0.0800	0.0800
Tier 1 capital (to average assets)	$ 280,823	$ 279,158
Tier 1 capital (to average assets), ratio	0.0400	0.0400
To be Well Capitalized Under Prompt Corrective Action Provisions
CET1 (to risk weighted assets)	$ 408,608	$ 384,530
CET1 (to risk weighted assets), ratio	6.50%	6.50%
Tier 1 Capital (to risk weighted assets)	$ 502,902	$ 473,268
Tier 1 Capital (to risk weighted assets), ratio	0.0800	0.0800
Total Capital (to risk weighted assets)	$ 628,627	$ 591,585
Total Capital (to risk weighted assets), ratio	0.1000	0.1000
Tier 1 capital (to average assets)	$ 351,029	$ 348,947
Tier 1 capital (to average assets), ratio	0.0500	0.0500

Capital Conservation Buffer

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Compliance with Regulatory Capital Requirements under Banking Regulations, Actual

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Compliance With Regulatory Capital Requirements Under Banking Regulations, Capital Adequecy Requirements

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Amount of total capital as defined by regulatory framework.

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Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Topic 942
-SubTopic 505
-Name Accounting Standards Codification
-Section 50
-Paragraph 1
-Subparagraph (c)(1)
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147477270/942-505-50-1

Reference 2: http://www.xbrl.org/2003/role/disclosureRef
-Topic 942
-SubTopic 505
-Name Accounting Standards Codification
-Section 50
-Paragraph 1B
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147477270/942-505-50-1B

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