Summary of Significant Accounting Policies - Goodwill and Other Intangible Assets (Details)				1 Months Ended
	Oct. 11, 2019	May 04, 2018	Aug. 01, 2015	Nov. 30, 2014
United American Bank
Goodwill and Other Intangible Assets
Useful life, amortization period		3 years
Core deposit | Focus
Goodwill and Other Intangible Assets
Useful life, amortization period			10 years
Below/ (Above) market-value lease | Presidio bank
Goodwill and Other Intangible Assets
Useful life, amortization period	60 months
Customer relationship and brokered relationship | BVF/CSNK
Goodwill and Other Intangible Assets
Useful life, amortization period				10 years