Indemnification Asset - Additional Information (Detail) - USD ($) $ in Thousands		3 Months Ended
May 09, 2017	Mar. 31, 2017
Fdic Indemnification Asset [Abstract]
Payment made to FDIC	$ 184	$ (72)
Gain on termination of loss share agreement	$ 712

Federal deposit insurance corporation indemnification asset, cash received (payments made).

No definition available.

Name:	tcbk_FederalDepositInsuranceCorporationIndemnificationAssetCashReceivedPaymentsMade
Namespace Prefix:	tcbk_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	duration