v3.25.4
Regulatory Capital Matters - Schedule of Actual and required capital amounts (Details)
$ in Thousands
Dec. 31, 2025
USD ($)
Dec. 31, 2024
USD ($)
Parent Company    
Compliance with Regulatory Capital Requirements under Banking Regulations [Line Items]    
Total risk-based capital to risk-weighted assets, Actual Amount $ 1,187,736 $ 1,128,334
Total risk-based capital to risk-weighted assets, Actual Ratio 0.1573 0.1542
Total risk-based capital to risk-weighted assets, For Capital Adequacy Purposes, Amount $ 604,008 $ 585,567
Total risk-based capital to risk-weighted assets, For Capital Adequacy Purposes, Ratio 0.0800 0.0800
Tier 1 risk-based capital to risk-weighted assets, Actual Amount $ 1,065,783 $ 964,517
Tier 1 risk-based capital to risk-weighted assets, Actual Ratio 0.1412 0.1318
Tier 1 risk-based capital to risk-weighted assets, For Capital Adequacy Purposes, Amount $ 453,006 $ 439,175
Tier 1 risk-based capital to risk-weighted assets, For Capital Adequacy Purposes, Ratio 0.0600 0.0600
Common Equity Tier 1 (CET 1) to risk-weighted assets, Actual Amount $ 1,065,783 $ 964,517
Common Equity Tier 1 (CET 1) to risk-weighted assets, Actual Ratio 0.1412 0.1318
Common Equity Tier 1 (CET 1) to risk-weighted assets, For Capital Adequacy Purposes, Amount $ 339,755 $ 329,381
Common Equity Tier 1 (CET 1) to risk-weighted assets, For Capital Adequacy Purposes, Ratio 0.0450 0.0450
Tier 1 leverage capital to average assets, Actual Amount $ 1,065,783 $ 964,517
Tier 1 leverage capital to average assets, Actual Ratio 0.1275 0.1211
Tier 1 leverage capital to average assets, For Capital Adequacy Purposes, Amount $ 334,328 $ 318,646
Tier 1 leverage capital to average assets, For Capital Adequacy Purposes, Ratio 0.0400 0.0400
Dividends from Sunflower Wealth Advisors, LLC    
Compliance with Regulatory Capital Requirements under Banking Regulations [Line Items]    
Total risk-based capital to risk-weighted assets, Actual Amount $ 1,119,717 $ 1,018,866
Total risk-based capital to risk-weighted assets, Actual Ratio 0.1485 0.1394
Total risk-based capital to risk-weighted assets, For Capital Adequacy Purposes, Amount $ 603,066 $ 584,594
Total risk-based capital to risk-weighted assets, For Capital Adequacy Purposes, Ratio 0.0800 0.0800
Total risk-based capital to risk-weighted assets, To be Well-Capitalized under Prompt Corrective Action Provisions, Amount $ 753,832 $ 730,742
Total risk-based capital to risk-weighted assets, To be Well-Capitalized under Prompt Corrective Action Provisions, Ratio 0.1000 0.1000
Tier 1 risk-based capital to risk-weighted assets, Actual Amount $ 1,034,444 $ 930,890
Tier 1 risk-based capital to risk-weighted assets, Actual Ratio 0.1372 0.1274
Tier 1 risk-based capital to risk-weighted assets, For Capital Adequacy Purposes, Amount $ 452,299 $ 438,445
Tier 1 risk-based capital to risk-weighted assets, For Capital Adequacy Purposes, Ratio 0.0600 0.0600
Tier 1 risk-based capital to risk-weighted assets, To be Well-Capitalized under Prompt Corrective Action Provisions, Amount $ 603,066 $ 584,594
Tier 1 risk-based capital to risk-weighted assets, To be Well-Capitalized under Prompt Corrective Action Provisions, Ratio 0.0800 0.0800
Common Equity Tier 1 (CET 1) to risk-weighted assets, Actual Amount $ 1,034,444 $ 930,890
Common Equity Tier 1 (CET 1) to risk-weighted assets, Actual Ratio 0.1372 0.1274
Common Equity Tier 1 (CET 1) to risk-weighted assets, For Capital Adequacy Purposes, Amount $ 339,225 $ 328,834
Common Equity Tier 1 (CET 1) to risk-weighted assets, For Capital Adequacy Purposes, Ratio 0.0450 0.0450
Common Equity Tier 1 (CET 1) to risk-weighted assets, To be Well-Capitalized under Prompt Corrective Action Provisions, Amount $ 489,991 $ 474,982
Common Equity Tier 1 (CET 1) to risk-weighted assets, To be Well-Capitalized under Prompt Corrective Action Provisions, Ratio 0.0650 0.0650
Tier 1 leverage capital to average assets, Actual Amount $ 1,034,444 $ 930,890
Tier 1 leverage capital to average assets, Actual Ratio 0.1238 0.1169
Tier 1 leverage capital to average assets, For Capital Adequacy Purposes, Amount $ 334,290 $ 318,647
Tier 1 leverage capital to average assets, For Capital Adequacy Purposes, Ratio 0.0400 0.0400
Tier 1 leverage capital to average assets, To be Well-Capitalized under Prompt Corrective Action Provisions, Amount $ 417,862 $ 398,308
Tier 1 leverage capital to average assets, To be Well-Capitalized under Prompt Corrective Action Provisions, Ratio 0.0500 0.0500