Fair Value Measurement (Details Textual) (USD $) In Thousands, unless otherwise specified	3 Months Ended	12 Months Ended
Mar. 31, 2013	Dec. 31, 2012
Fair Value Measurement (Textual) [Abstract]
Transfers between any levels	$ 0	$ 0
Carrying value of loans fully charged-off	$ 0

Fair value measurement transfers from one level to another.

No definition available.

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