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Stock Options and Other Equity-Based Incentive Instruments - Stock Option Activity (Detail) (USD $)
 3 Months Ended
Mar. 31, 2015
Mar. 31, 2015
Share-based Compensation, Shares Authorized under Stock Option Plans, Exercise Price Range [Line Items]    
Options outstanding, Number of Shares, beginning balance 1,102,850us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingNumber  
Options granted, Number of Shares 0us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsGrantsInPeriodGross  
Options exercised, Number of Shares (47,000)us-gaap_StockIssuedDuringPeriodSharesStockOptionsExercised  
Options forfeited, Number of Shares 0us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsForfeituresInPeriod  
Options outstanding, Number of Shares, ending balance 1,055,850us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingNumber  
Options outstanding, Weighted Average Exercise Price, beginning balance $ 18.25us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingWeightedAverageExercisePrice  
Options granted, Weighted Average Exercise Price $ 0us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardOptionsGrantsInPeriodWeightedAverageExercisePrice  
Options exercised, Weighted Average Exercise Price $ 18.86us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardOptionsExercisesInPeriodWeightedAverageExercisePrice  
Options forfeited, Weighted Average Exercise Price $ 0us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardOptionsForfeituresInPeriodWeightedAverageExercisePrice  
Options outstanding, Weighted Average Exercise Price, ending balance $ 18.22us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingWeightedAverageExercisePrice  
Outstanding, Weighted Average Fair Value on Date of Grant, beginning balance $ 0us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedWeightedAverageGrantDateFairValue $ 0us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedWeightedAverageGrantDateFairValue
Options granted, Weighted Average Fair Value on Date of Grant $ 0us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsGrantsInPeriodWeightedAverageGrantDateFairValue  
Options exercised, Weighted Average Fair Value on Date of Grant $ 0tcbk_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsExercisedInPeriodWeightedAverageGrantDateFairValue  
Options forfeited, Weighted Average Fair Value on Date of Grant $ 0us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsForfeituresWeightedAverageGrantDateFairValue  
Minimum [Member]    
Share-based Compensation, Shares Authorized under Stock Option Plans, Exercise Price Range [Line Items]    
Options outstanding, Option Price per Share, beginning balance $ 12.63tcbk_ShareBasedCompensationArrangementsByShareBasedPaymentAwardOptionsOutstandingOptionPricePerShare
/ us-gaap_RangeAxis
= us-gaap_MinimumMember		  
Options granted, Option Price per Share $ 0tcbk_ShareBasedCompensationArrangementsByShareBasedPaymentAwardOptionsGrantsInPeriodOptionPricePerShare
/ us-gaap_RangeAxis
= us-gaap_MinimumMember		  
Options exercised, Option Price per Share $ 15.34tcbk_ShareBasedCompensationArrangementsByShareBasedPaymentAwardOptionsExercisesInPeriodOptionPricePerShare
/ us-gaap_RangeAxis
= us-gaap_MinimumMember		  
Options forfeited, Option Price per Share $ 0tcbk_ShareBasedCompensationArrangementsByShareBasedPaymentAwardOptionsForfeituresInPeriodOptionPricePerShare
/ us-gaap_RangeAxis
= us-gaap_MinimumMember		  
Options outstanding, Option Price per Share, ending balance $ 12.63tcbk_ShareBasedCompensationArrangementsByShareBasedPaymentAwardOptionsOutstandingOptionPricePerShare
/ us-gaap_RangeAxis
= us-gaap_MinimumMember		  
Maximum [Member]    
Share-based Compensation, Shares Authorized under Stock Option Plans, Exercise Price Range [Line Items]    
Options outstanding, Option Price per Share, beginning balance $ 25.91tcbk_ShareBasedCompensationArrangementsByShareBasedPaymentAwardOptionsOutstandingOptionPricePerShare
/ us-gaap_RangeAxis
= us-gaap_MaximumMember		  
Options granted, Option Price per Share $ 0tcbk_ShareBasedCompensationArrangementsByShareBasedPaymentAwardOptionsGrantsInPeriodOptionPricePerShare
/ us-gaap_RangeAxis
= us-gaap_MaximumMember		  
Options exercised, Option Price per Share $ 19.46tcbk_ShareBasedCompensationArrangementsByShareBasedPaymentAwardOptionsExercisesInPeriodOptionPricePerShare
/ us-gaap_RangeAxis
= us-gaap_MaximumMember		  
Options forfeited, Option Price per Share $ 0tcbk_ShareBasedCompensationArrangementsByShareBasedPaymentAwardOptionsForfeituresInPeriodOptionPricePerShare
/ us-gaap_RangeAxis
= us-gaap_MaximumMember		  
Options outstanding, Option Price per Share, ending balance $ 25.91tcbk_ShareBasedCompensationArrangementsByShareBasedPaymentAwardOptionsOutstandingOptionPricePerShare
/ us-gaap_RangeAxis
= us-gaap_MaximumMember