XML 58 R67.htm IDEA: XBRL DOCUMENT v3.19.3
Stock Options and Other Equity-Based Incentive Instruments - Additional Information (Detail) - USD ($)
3 Months Ended 9 Months Ended
Sep. 30, 2019
Sep. 30, 2019
Apr. 16, 2019
Dec. 31, 2018
Share-based Payment Arrangement, Option, Exercise Price Range [Line Items]        
Weighted-average remaining contractual term (in years) 1 year 2 months 12 days      
Number of units released   0    
Number of units increased   76,968    
Restricted Stock Units (RSUs) | Market Plus Service Condition Vesting RSUs        
Share-based Payment Arrangement, Option, Exercise Price Range [Line Items]        
Number of units outstanding expected to vest (in shares) 51,312 51,312   45,536
Weighted-average remaining contractual term (in years)   1 year 10 months 24 days    
Pre-tax compensation costs $ 1,045,845 $ 1,045,845    
Number of units released   (22,237)    
Restricted Stock Units (RSUs) | Service Condition Vesting RSUs        
Share-based Payment Arrangement, Option, Exercise Price Range [Line Items]        
Number of units outstanding expected to vest (in shares) 70,828 70,828   66,947
Pre-tax compensation costs $ 2,135,210 $ 2,135,210    
Number of units released   30,461    
2019 Plan        
Share-based Payment Arrangement, Option, Exercise Price Range [Line Items]        
Aggregate number of shares of TriCo's common stock issued (in shares)     1,500,000