XML 124 R105.htm IDEA: XBRL DOCUMENT v3.20.1
Goodwill, Core Deposit Intangible and Other Intangible Assets - Summary of Changes in Goodwill and Core Deposit Intangible Assets (Details) - USD ($)
$ in Thousands
 12 Months Ended
Dec. 31, 2019
Dec. 31, 2018
Dec. 31, 2017
Schedule Of Goodwill And Intangible Assets [Line Items]      
Beginning balance, Goodwill $ 128,177 $ 54,562 $ 51,975
Additions 20,176 73,615 2,587
Ending balance, Goodwill 148,353 128,177 54,562
Amortization or accretion (7,737) (5,629) (3,074)
Core Deposits      
Schedule Of Goodwill And Intangible Assets [Line Items]      
Beginning balance 30,360 16,720 19,776
Additions 6,220 19,060  
Amortization or accretion (7,469) (5,420) (3,056)
Ending balance 29,111 30,360 16,720
Accumulated amortization or accretion $ 26,355 $ 18,886 $ 13,466
Weighted average remaining amortization or accretion period 6 years 6 months 6 years 9 months 18 days 5 years 7 months 6 days
Customer Relationships      
Schedule Of Goodwill And Intangible Assets [Line Items]      
Beginning balance $ 3,059    
Additions   $ 3,216  
Amortization or accretion (268) (157)  
Ending balance 2,791 3,059  
Accumulated amortization or accretion $ 425 $ 157  
Weighted average remaining amortization or accretion period 10 years 4 months 24 days 11 years 4 months 24 days