TriCo Bancshares Condensed Financial Statements (Parent Only) - Condensed Balance Sheets (Parenthetical) (Detail) - $ / shares |
Sep. 30, 2015 |
Dec. 31, 2014 |
Aug. 21, 2007 |
---|---|---|---|
Condensed Financial Statements, Captions [Line Items] | |||
Common stock, par value | |||
Common stock, shares authorized | 50,000,000 | 50,000,000 | |
Common stock, shares issued | 22,764,295 | 22,714,964 | |
Common stock, shares outstanding | 22,764,295 | 22,714,964 | 15,814,662 |
Parent [Member] | |||
Condensed Financial Statements, Captions [Line Items] | |||
Common stock, par value | |||
Common stock, shares authorized | 50,000,000 | 50,000,000 | |
Common stock, shares issued | 22,764,295 | 22,714,964 | |
Common stock, shares outstanding | 22,764,295 | 22,714,964 |