Goodwill, Core Deposit Intangible and Other Intangible Assets - Summary of Changes in Goodwill, Core Deposit Intangible Assets and Customer Relationship Intangible Assets (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2022	Mar. 31, 2021
Schedule Of Goodwill And Intangible Assets [Line Items]
Beginning balance, Goodwill	$ 148,353	$ 148,353
Ending balance, Goodwill	148,353	148,353
Amortization	(1,596)	(1,749)
Core Deposits
Schedule Of Goodwill And Intangible Assets [Line Items]
Ending balance, Goodwill	13,475
Beginning balance	15,004	21,809
Amortization	(1,529)	(1,683)
Ending balance		20,126
Accumulated amortization	$ 41,991	$ 33,340
Weighted average remaining amortization period	4 years 8 months 12 days	5 years 4 months 24 days
Customer Relationships
Schedule Of Goodwill And Intangible Assets [Line Items]
Beginning balance	$ 2,201	$ 2,469
Amortization	(67)	(66)
Ending balance	2,134	2,403
Accumulated amortization	$ 1,082	$ 813
Weighted average remaining amortization period	8 years	9 years