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Goodwill and Other Intangible Assets - Additional Information (Detail) (USD $)
Oct. 03, 2014
Sep. 23, 2011
May 28, 2010
North Valley Bancorp [Member]      
Finite-Lived Intangible Assets [Line Items]      
Additions to core deposit intangibles $ 6,614,000tcbk_AdditionsToCoreDepositIntangibles
/ us-gaap_BusinessAcquisitionAxis
= tcbk_NorthValleyBancorpMember		    
Citizens [Member]      
Finite-Lived Intangible Assets [Line Items]      
Additions to core deposit intangibles   898,000tcbk_AdditionsToCoreDepositIntangibles
/ us-gaap_BusinessAcquisitionAxis
= tcbk_CitizensMember		  
Granite [Member]      
Finite-Lived Intangible Assets [Line Items]      
Additions to core deposit intangibles     $ 562,000tcbk_AdditionsToCoreDepositIntangibles
/ us-gaap_BusinessAcquisitionAxis
= tcbk_GraniteMember