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v3.23.3

Borrowings - Summary of Terms and Recorded Balance of Subordinated Debenture (Detail) - USD ($) $ in Thousands | 9 Months Ended |
--- | --- | ---
Sep. 30, 2023 | Dec. 31, 2022
Subordinated Borrowing [Line Items] |  |
Recorded Book Value | $ 101,080 | $ 101,040
Subordinated Debt |  |
Subordinated Borrowing [Line Items] |  |
Face Value | 98,889 |
TriCo Cap Trust I |  |
Subordinated Borrowing [Line Items] |  |
Recorded Book Value | 20,619 | 20,619
TriCo Cap Trust I | Subordinated Debt |  |
Subordinated Borrowing [Line Items] |  |
Face Value | $ 20,619 |
Current Coupon Rate | 8.62% |
TriCo Cap Trust II |  |
Subordinated Borrowing [Line Items] |  |
Recorded Book Value | $ 20,619 | 20,619
TriCo Cap Trust II | Subordinated Debt |  |
Subordinated Borrowing [Line Items] |  |
Face Value | $ 20,619 |
Current Coupon Rate | 8.16% |
North Valley Trust II |  |
Subordinated Borrowing [Line Items] |  |
Recorded Book Value | $ 5,576 | 5,503
North Valley Trust II | Subordinated Debt |  |
Subordinated Borrowing [Line Items] |  |
Face Value | $ 6,186 |
Current Coupon Rate | 8.88% |
North Valley Trust III |  |
Subordinated Borrowing [Line Items] |  |
Recorded Book Value | $ 4,449 | 4,383
North Valley Trust III | Subordinated Debt |  |
Subordinated Borrowing [Line Items] |  |
Face Value | $ 5,155 |
Current Coupon Rate | 8.41% |
North Valley Trust IV |  |
Subordinated Borrowing [Line Items] |  |
Recorded Book Value | $ 7,557 | 7,393
North Valley Trust IV | Subordinated Debt |  |
Subordinated Borrowing [Line Items] |  |
Face Value | $ 10,310 |
Current Coupon Rate | 7.00% |
VRB Subordinated - 6% |  |
Subordinated Borrowing [Line Items] |  |
Recorded Book Value | $ 17,046 | 17,187
VRB Subordinated - 6% | Subordinated Debt |  |
Subordinated Borrowing [Line Items] |  |
Interest rate | 6.00% |
Face Value | $ 16,000 |
Current Coupon Rate | 6.00% |
VRB Subordinated - 5% |  |
Subordinated Borrowing [Line Items] |  |
Recorded Book Value | $ 25,214 | $ 25,336
VRB Subordinated - 5% | Subordinated Debt |  |
Subordinated Borrowing [Line Items] |  |
Interest rate | 5.00% |
Face Value | $ 20,000 |
Current Coupon Rate | 5.00% |
LIBOR | TriCo Cap Trust I | Subordinated Debt |  |
Subordinated Borrowing [Line Items] |  |
Coupon Rate (Variable) 3 mo. LIBOR + | 3.05% |
LIBOR | TriCo Cap Trust II | Subordinated Debt |  |
Subordinated Borrowing [Line Items] |  |
Coupon Rate (Variable) 3 mo. LIBOR + | 2.55% |
LIBOR | North Valley Trust II | Subordinated Debt |  |
Subordinated Borrowing [Line Items] |  |
Coupon Rate (Variable) 3 mo. LIBOR + | 3.25% |
LIBOR | North Valley Trust III | Subordinated Debt |  |
Subordinated Borrowing [Line Items] |  |
Coupon Rate (Variable) 3 mo. LIBOR + | 2.80% |
LIBOR | North Valley Trust IV | Subordinated Debt |  |
Subordinated Borrowing [Line Items] |  |
Coupon Rate (Variable) 3 mo. LIBOR + | 1.33% |

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