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v3.25.3

Junior Subordinated Debt - Summary of Terms and Recorded Balance of Subordinated Debenture (Detail) - USD ($) $ in Thousands | 3 Months Ended |
--- | --- | ---
Sep. 30, 2025 | Dec. 31, 2024
Subordinated Borrowing [Line Items] |  |
Recorded Book Value | $ 41,238 | $ 101,191
Subordinated debt |  |
Subordinated Borrowing [Line Items] |  |
Face Value | 41,238 |
Recorded Book Value | 41,238 | 101,191
TriCo Cap Trust I | Subordinated debt |  |
Subordinated Borrowing [Line Items] |  |
Face Value | $ 20,619 |
Coupon Rate (Variable) 3 mo. SOFR + | 3.05% |
Current Coupon Rate | 7.63% |
Recorded Book Value | $ 20,619 | 20,619
TriCo Cap Trust II | Subordinated debt |  |
Subordinated Borrowing [Line Items] |  |
Face Value | $ 20,619 |
Coupon Rate (Variable) 3 mo. SOFR + | 2.55% |
Current Coupon Rate | 7.13% |
Recorded Book Value | $ 20,619 | 20,619
North Valley Trust II | Subordinated debt |  |
Subordinated Borrowing [Line Items] |  |
Face Value | $ 0 |
Coupon Rate (Variable) 3 mo. SOFR + | 0.00% |
Current Coupon Rate | 0.00% |
Recorded Book Value | $ 0 | 5,713
North Valley Trust III | Subordinated debt |  |
Subordinated Borrowing [Line Items] |  |
Face Value | $ 0 |
Coupon Rate (Variable) 3 mo. SOFR + | 0.00% |
Current Coupon Rate | 0.00% |
Recorded Book Value | $ 0 | 4,571
North Valley Trust IV | Subordinated debt |  |
Subordinated Borrowing [Line Items] |  |
Face Value | $ 0 |
Coupon Rate (Variable) 3 mo. SOFR + | 0.00% |
Current Coupon Rate | 0.00% |
Recorded Book Value | $ 0 | 7,863
VRB Subordinated | Subordinated debt |  |
Subordinated Borrowing [Line Items] |  |
Face Value | $ 0 |
Coupon Rate (Variable) 3 mo. SOFR + | 0.00% |
Current Coupon Rate | 0.00% |
Recorded Book Value | $ 0 | 16,799
VRB Subordinated - 5% | Subordinated debt |  |
Subordinated Borrowing [Line Items] |  |
Interest rate | 5.00% |
Face Value | $ 0 |
Coupon Rate (Variable) 3 mo. SOFR + | 0.00% |
Current Coupon Rate | 0.00% |
Recorded Book Value | $ 0 | $ 25,007

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