XML 59 R47.htm IDEA: XBRL DOCUMENT v3.20.2

Allowance for Credit Losses on Loans - Analysis of Past Due and Nonaccrual Loans (Detail) - USD ($) $ in Thousands	Sep. 30, 2020	Dec. 31, 2019
Financing Receivable, Past Due [Line Items]
Total	$ 4,826,338	$ 4,307,366
Commercial real estate
Financing Receivable, Past Due [Line Items]
Total	2,936,422	2,818,782
Consumer
Financing Receivable, Past Due [Line Items]
Total	926,835	955,050
Commercial and industrial
Financing Receivable, Past Due [Line Items]
Total	633,897	249,791
Construction
Financing Receivable, Past Due [Line Items]
Total	284,933	249,827
Agriculture production
Financing Receivable, Past Due [Line Items]
Total	40,613	32,633
Leases
Financing Receivable, Past Due [Line Items]
Total	3,638	1,283
CRE non-owner occupied | Commercial real estate
Financing Receivable, Past Due [Line Items]
Total	1,600,284	1,609,556
CRE owner occupied | Commercial real estate
Financing Receivable, Past Due [Line Items]
Total	581,090	546,434
Multifamily | Commercial real estate
Financing Receivable, Past Due [Line Items]
Total	602,199	517,725
Farmland | Commercial real estate
Financing Receivable, Past Due [Line Items]
Total	152,849	145,067
SFR 1-4 1st DT Liens | Commercial real estate
Financing Receivable, Past Due [Line Items]
Total	511,759
SFR 1-4 1st DT Liens | Consumer
Financing Receivable, Past Due [Line Items]
Total		509,508
SFR HELOCs and junior liens | Consumer
Financing Receivable, Past Due [Line Items]
Total	332,820	362,886
Other | Consumer
Financing Receivable, Past Due [Line Items]
Total	82,256	82,656
Financial Asset Originated
Financing Receivable, Past Due [Line Items]
Past due	10,522	10,720
Current	4,815,816	4,296,646
Total	4,826,338	4,307,366
Financial Asset Originated | Commercial real estate
Financing Receivable, Past Due [Line Items]
Past due	3,051	3,148
Current	2,933,371	2,815,634
Total	2,936,422	2,818,782
Financial Asset Originated | Consumer
Financing Receivable, Past Due [Line Items]
Past due	6,074	6,599
Current	920,761	948,451
Total	926,835	955,050
Financial Asset Originated | Commercial and industrial
Financing Receivable, Past Due [Line Items]
Past due	865	924
Current	633,032	248,867
Total	633,897	249,791
Financial Asset Originated | Construction
Financing Receivable, Past Due [Line Items]
Past due	202	0
Current	284,731	249,827
Total	284,933	249,827
Financial Asset Originated | Agriculture production
Financing Receivable, Past Due [Line Items]
Past due	330	49
Current	40,283	32,584
Total	40,613	32,633
Financial Asset Originated | Leases
Financing Receivable, Past Due [Line Items]
Past due	0	0
Current	3,638	1,283
Total	3,638	1,283
Financial Asset Originated | CRE non-owner occupied | Commercial real estate
Financing Receivable, Past Due [Line Items]
Past due	1,397	518
Current	1,598,887	1,609,038
Total	1,600,284	1,609,556
Financial Asset Originated | CRE owner occupied | Commercial real estate
Financing Receivable, Past Due [Line Items]
Past due	1,203	293
Current	579,887	546,141
Total	581,090	546,434
Financial Asset Originated | Multifamily | Commercial real estate
Financing Receivable, Past Due [Line Items]
Past due	0	2,307
Current	602,199	515,418
Total	602,199	517,725
Financial Asset Originated | Farmland | Commercial real estate
Financing Receivable, Past Due [Line Items]
Past due	451	30
Current	152,398	145,037
Total	152,849	145,067
Financial Asset Originated | SFR 1-4 1st DT Liens | Consumer
Financing Receivable, Past Due [Line Items]
Past due	2,513	3,477
Current	509,246	506,031
Total	511,759	509,508
Financial Asset Originated | SFR HELOCs and junior liens | Consumer
Financing Receivable, Past Due [Line Items]
Past due	3,137	2,926
Current	329,683	359,960
Total	332,820	362,886
Financial Asset Originated | Other | Consumer
Financing Receivable, Past Due [Line Items]
Past due	424	196
Current	81,832	82,460
Total	82,256	82,656
Financial Asset, 30 to 59 Days Past Due | Financial Asset Originated
Financing Receivable, Past Due [Line Items]
Past due	4,039	3,812
Financial Asset, 30 to 59 Days Past Due | Financial Asset Originated | Commercial real estate
Financing Receivable, Past Due [Line Items]
Past due	1,742	581
Financial Asset, 30 to 59 Days Past Due | Financial Asset Originated | Consumer
Financing Receivable, Past Due [Line Items]
Past due	1,794	2,579
Financial Asset, 30 to 59 Days Past Due | Financial Asset Originated | Commercial and industrial
Financing Receivable, Past Due [Line Items]
Past due	365	603
Financial Asset, 30 to 59 Days Past Due | Financial Asset Originated | Construction
Financing Receivable, Past Due [Line Items]
Past due	138	0
Financial Asset, 30 to 59 Days Past Due | Financial Asset Originated | Agriculture production
Financing Receivable, Past Due [Line Items]
Past due	0	49
Financial Asset, 30 to 59 Days Past Due | Financial Asset Originated | Leases
Financing Receivable, Past Due [Line Items]
Past due	0	0
Financial Asset, 30 to 59 Days Past Due | Financial Asset Originated | CRE non-owner occupied | Commercial real estate
Financing Receivable, Past Due [Line Items]
Past due	960	268
Financial Asset, 30 to 59 Days Past Due | Financial Asset Originated | CRE owner occupied | Commercial real estate
Financing Receivable, Past Due [Line Items]
Past due	782	0
Financial Asset, 30 to 59 Days Past Due | Financial Asset Originated | Multifamily | Commercial real estate
Financing Receivable, Past Due [Line Items]
Past due	0	283
Financial Asset, 30 to 59 Days Past Due | Financial Asset Originated | Farmland | Commercial real estate
Financing Receivable, Past Due [Line Items]
Past due	0	30
Financial Asset, 30 to 59 Days Past Due | Financial Asset Originated | SFR 1-4 1st DT Liens | Consumer
Financing Receivable, Past Due [Line Items]
Past due	434	1,149
Financial Asset, 30 to 59 Days Past Due | Financial Asset Originated | SFR HELOCs and junior liens | Consumer
Financing Receivable, Past Due [Line Items]
Past due	1,205	1,258
Financial Asset, 30 to 59 Days Past Due | Financial Asset Originated | Other | Consumer
Financing Receivable, Past Due [Line Items]
Past due	155	172
Financial Asset, 60 to 89 Days Past Due | Financial Asset Originated
Financing Receivable, Past Due [Line Items]
Past due	1,548	1,385
Financial Asset, 60 to 89 Days Past Due | Financial Asset Originated | Commercial real estate
Financing Receivable, Past Due [Line Items]
Past due	131	136
Financial Asset, 60 to 89 Days Past Due | Financial Asset Originated | Consumer
Financing Receivable, Past Due [Line Items]
Past due	645	952
Financial Asset, 60 to 89 Days Past Due | Financial Asset Originated | Commercial and industrial
Financing Receivable, Past Due [Line Items]
Past due	395	297
Financial Asset, 60 to 89 Days Past Due | Financial Asset Originated | Construction
Financing Receivable, Past Due [Line Items]
Past due	47	0
Financial Asset, 60 to 89 Days Past Due | Financial Asset Originated | Agriculture production
Financing Receivable, Past Due [Line Items]
Past due	330	0
Financial Asset, 60 to 89 Days Past Due | Financial Asset Originated | Leases
Financing Receivable, Past Due [Line Items]
Past due	0	0
Financial Asset, 60 to 89 Days Past Due | Financial Asset Originated | CRE non-owner occupied | Commercial real estate
Financing Receivable, Past Due [Line Items]
Past due	131	136
Financial Asset, 60 to 89 Days Past Due | Financial Asset Originated | CRE owner occupied | Commercial real estate
Financing Receivable, Past Due [Line Items]
Past due	0
Financial Asset, 60 to 89 Days Past Due | Financial Asset Originated | Multifamily | Commercial real estate
Financing Receivable, Past Due [Line Items]
Past due	0	0
Financial Asset, 60 to 89 Days Past Due | Financial Asset Originated | Farmland | Commercial real estate
Financing Receivable, Past Due [Line Items]
Past due	0	0
Financial Asset, 60 to 89 Days Past Due | Financial Asset Originated | SFR 1-4 1st DT Liens | Consumer
Financing Receivable, Past Due [Line Items]
Past due	74	371
Financial Asset, 60 to 89 Days Past Due | Financial Asset Originated | SFR HELOCs and junior liens | Consumer
Financing Receivable, Past Due [Line Items]
Past due	492	580
Financial Asset, 60 to 89 Days Past Due | Financial Asset Originated | Other | Consumer
Financing Receivable, Past Due [Line Items]
Past due	79	1
Financial Asset, Equal to or Greater than 90 Days Past Due | Financial Asset Originated
Financing Receivable, Past Due [Line Items]
Past due	4,935	5,523
Financial Asset, Equal to or Greater than 90 Days Past Due | Financial Asset Originated | Commercial real estate
Financing Receivable, Past Due [Line Items]
Past due	1,178	2,431
Financial Asset, Equal to or Greater than 90 Days Past Due | Financial Asset Originated | Consumer
Financing Receivable, Past Due [Line Items]
Past due	3,635	3,068
Financial Asset, Equal to or Greater than 90 Days Past Due | Financial Asset Originated | Commercial and industrial
Financing Receivable, Past Due [Line Items]
Past due	105	24
Financial Asset, Equal to or Greater than 90 Days Past Due | Financial Asset Originated | Construction
Financing Receivable, Past Due [Line Items]
Past due	17	0
Financial Asset, Equal to or Greater than 90 Days Past Due | Financial Asset Originated | Agriculture production
Financing Receivable, Past Due [Line Items]
Past due	0	0
Financial Asset, Equal to or Greater than 90 Days Past Due | Financial Asset Originated | Leases
Financing Receivable, Past Due [Line Items]
Past due	0	0
Financial Asset, Equal to or Greater than 90 Days Past Due | Financial Asset Originated | CRE non-owner occupied | Commercial real estate
Financing Receivable, Past Due [Line Items]
Past due	306	114
Financial Asset, Equal to or Greater than 90 Days Past Due | Financial Asset Originated | CRE owner occupied | Commercial real estate
Financing Receivable, Past Due [Line Items]
Past due	421	293
Financial Asset, Equal to or Greater than 90 Days Past Due | Financial Asset Originated | Multifamily | Commercial real estate
Financing Receivable, Past Due [Line Items]
Past due	0	2,024
Financial Asset, Equal to or Greater than 90 Days Past Due | Financial Asset Originated | Farmland | Commercial real estate
Financing Receivable, Past Due [Line Items]
Past due	451	0
Financial Asset, Equal to or Greater than 90 Days Past Due | Financial Asset Originated | SFR 1-4 1st DT Liens | Consumer
Financing Receivable, Past Due [Line Items]
Past due	2,005	1,957
Financial Asset, Equal to or Greater than 90 Days Past Due | Financial Asset Originated | SFR HELOCs and junior liens | Consumer
Financing Receivable, Past Due [Line Items]
Past due	1,440	1,088
Financial Asset, Equal to or Greater than 90 Days Past Due | Financial Asset Originated | Other | Consumer
Financing Receivable, Past Due [Line Items]
Past due	$ 190	$ 23

X

- Definition

Amount of financing receivable not past due.

+ References

Reference 1: http://www.xbrl.org/2003/role/exampleRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 326
-SubTopic 20
-Section 55
-Paragraph 80
-URI http://asc.fasb.org/extlink&oid=118955255&loc=SL82922355-210448

Reference 2: http://www.xbrl.org/2009/role/commonPracticeRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 326
-SubTopic 20
-Section 50
-Paragraph 14
-URI http://asc.fasb.org/extlink&oid=119407570&loc=SL82919253-210447

+ Details

Name:	us-gaap_FinancingReceivableRecordedInvestmentCurrent
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant

X

- Definition

Amount of financing receivable past due.

+ References

Reference 1: http://www.xbrl.org/2003/role/exampleRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 326
-SubTopic 20
-Section 55
-Paragraph 80
-URI http://asc.fasb.org/extlink&oid=118955255&loc=SL82922355-210448

Reference 2: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 326
-SubTopic 20
-Section 50
-Paragraph 14
-URI http://asc.fasb.org/extlink&oid=119407570&loc=SL82919253-210447

Reference 3: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 310
-SubTopic 10
-Section 50
-Paragraph 7A
-URI http://asc.fasb.org/extlink&oid=118936363&loc=SL6953401-111524

+ Details

Name:	us-gaap_FinancingReceivableRecordedInvestmentPastDue
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant

X

- Definition

Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

+ References

No definition available.

+ Details

Name:	us-gaap_FinancingReceivableRecordedInvestmentPastDueLineItems
Namespace Prefix:	us-gaap_
Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration

X

- Definition

Amount, before allowance for credit loss, of financing receivable.

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 326
-SubTopic 20
-Section 50
-Paragraph 5
-Subparagraph (b)
-URI http://asc.fasb.org/extlink&oid=119407570&loc=SL82919230-210447

+ Details

Name:	us-gaap_NotesReceivableGross
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant

X

- Details

Name:	us-gaap_FinancingReceivablePortfolioSegmentAxis=us-gaap_CommercialRealEstatePortfolioSegmentMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	us-gaap_FinancingReceivablePortfolioSegmentAxis=us-gaap_ConsumerPortfolioSegmentMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	us-gaap_FinancingReceivablePortfolioSegmentAxis=tcbk_CommercialAndIndustrialPortfolioSegmentMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	us-gaap_FinancingReceivablePortfolioSegmentAxis=tcbk_ConstructionPortfolioSegmentMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	us-gaap_FinancingReceivablePortfolioSegmentAxis=tcbk_AgricultureProductionPortfolioSegmentMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	us-gaap_FinancingReceivablePortfolioSegmentAxis=us-gaap_FinanceLeasesPortfolioSegmentMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis=tcbk_CRENonOwnerOccupiedMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis=tcbk_CREOwnerOccupiedMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis=srt_MultifamilyMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis=tcbk_AgricultureLoanMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis=tcbk_SFR141stDTLiensMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis=us-gaap_HomeEquityLoanMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis=tcbk_OtherLoansMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	us-gaap_CreditLossStatusAxis=us-gaap_FinancialAssetOriginatedMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	us-gaap_FinancingReceivablesPeriodPastDueAxis=us-gaap_FinancingReceivables30To59DaysPastDueMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	us-gaap_FinancingReceivablesPeriodPastDueAxis=us-gaap_FinancingReceivables60To89DaysPastDueMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	us-gaap_FinancingReceivablesPeriodPastDueAxis=us-gaap_FinancingReceivablesEqualToGreaterThan90DaysPastDueMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type: