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Junior Subordinated Debt - Summary of Terms and Recorded Balance of Subordinated Debenture (Detail) - USD ($) $ in Thousands | 12 Months Ended |  |
--- | --- | --- | ---
Dec. 31, 2022 | Mar. 25, 2022 | Dec. 31, 2021
Subordinated Borrowing [Line Items] |  |  |
Recorded Book Value | $ 101,040 |  | $ 58,079
Senior Subordinated Notes |  |  |
Subordinated Borrowing [Line Items] |  |  |
Face Value | 98,889 | $ 36,000 |
TriCo Cap Trust I |  |  |
Subordinated Borrowing [Line Items] |  |  |
Recorded Book Value | 20,619 |  | 20,619
TriCo Cap Trust I | Senior Subordinated Notes |  |  |
Subordinated Borrowing [Line Items] |  |  |
Face Value | $ 20,619 |  |
Current Coupon Rate | 7.13% |  |
TriCo Cap Trust II |  |  |
Subordinated Borrowing [Line Items] |  |  |
Recorded Book Value | $ 20,619 |  | 20,619
TriCo Cap Trust II | Senior Subordinated Notes |  |  |
Subordinated Borrowing [Line Items] |  |  |
Face Value | $ 20,619 |  |
Current Coupon Rate | 6.87% |  |
North Valley Trust II |  |  |
Subordinated Borrowing [Line Items] |  |  |
Recorded Book Value | $ 5,503 |  | 5,403
North Valley Trust II | Senior Subordinated Notes |  |  |
Subordinated Borrowing [Line Items] |  |  |
Face Value | $ 6,186 |  |
Current Coupon Rate | 7.69% |  |
North Valley Trust III |  |  |
Subordinated Borrowing [Line Items] |  |  |
Recorded Book Value | $ 4,383 |  | 4,291
North Valley Trust III | Senior Subordinated Notes |  |  |
Subordinated Borrowing [Line Items] |  |  |
Face Value | $ 5,155 |  |
Current Coupon Rate | 7.12% |  |
North Valley Trust IV |  |  |
Subordinated Borrowing [Line Items] |  |  |
Recorded Book Value | $ 7,393 |  | 7,147
North Valley Trust IV | Senior Subordinated Notes |  |  |
Subordinated Borrowing [Line Items] |  |  |
Face Value | $ 10,310 |  |
Current Coupon Rate | 6.10% |  |
VRB Subordinated - 6% |  |  |
Subordinated Borrowing [Line Items] |  |  |
Recorded Book Value | $ 17,187 |  | 0
VRB Subordinated - 6% | Senior Subordinated Notes |  |  |
Subordinated Borrowing [Line Items] |  |  |
Interest rate | 6.00% |  |
Face Value | $ 16,000 | 16,000 |
Current Coupon Rate | 6.00% |  |
VRB Subordinated - 5% |  |  |
Subordinated Borrowing [Line Items] |  |  |
Recorded Book Value | $ 25,336 |  | $ 0
VRB Subordinated - 5% | Senior Subordinated Notes |  |  |
Subordinated Borrowing [Line Items] |  |  |
Interest rate | 5.00% |  |
Face Value | $ 20,000 | $ 20,000 |
Current Coupon Rate | 5.00% |  |
LIBOR PLUS | TriCo Cap Trust I | Senior Subordinated Notes |  |  |
Subordinated Borrowing [Line Items] |  |  |
Coupon Rate (Variable) 3 mo. LIBOR + | 3.05% |  |
LIBOR PLUS | TriCo Cap Trust II | Senior Subordinated Notes |  |  |
Subordinated Borrowing [Line Items] |  |  |
Coupon Rate (Variable) 3 mo. LIBOR + | 2.55% |  |
LIBOR PLUS | North Valley Trust II | Senior Subordinated Notes |  |  |
Subordinated Borrowing [Line Items] |  |  |
Coupon Rate (Variable) 3 mo. LIBOR + | 3.25% |  |
LIBOR PLUS | North Valley Trust III | Senior Subordinated Notes |  |  |
Subordinated Borrowing [Line Items] |  |  |
Coupon Rate (Variable) 3 mo. LIBOR + | 2.80% |  |
LIBOR PLUS | North Valley Trust IV | Senior Subordinated Notes |  |  |
Subordinated Borrowing [Line Items] |  |  |
Coupon Rate (Variable) 3 mo. LIBOR + | 1.33% |  |

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- Definition Including the current and noncurrent portions, carrying value as of the balance sheet date of long-term debt (with maturities initially due after one year or beyond the operating cycle if longer) identified as Junior Subordinated Notes, which have a lower priority than senior instruments. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 944 -SubTopic 210 -Section S99 -Paragraph 1 -Subparagraph (SX 210.7-03(16)(a)) -URI https://asc.fasb.org/extlink&oid=126734703&loc=d3e572229-122910 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02(22)) -URI https://asc.fasb.org/extlink&oid=120391452&loc=d3e13212-122682 Reference 3: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 942 -SubTopic 210 -Section S99 -Paragraph 1 -Subparagraph (SX 210.9-03(16)) -URI https://asc.fasb.org/extlink&oid=126897435&loc=d3e534808-122878 + Details
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