Annual report pursuant to Section 13 and 15(d)

Investment Securities - Schedule of Investment Securities Available for Sale and Aggregated by Investment Category and Length of Time Individual Securities in Continuous Unrealized Loss Position (Details)

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Investment Securities - Schedule of Investment Securities Available for Sale and Aggregated by Investment Category and Length of Time Individual Securities in Continuous Unrealized Loss Position (Details) - USD ($)
$ in Thousands
Dec. 31, 2020
Dec. 31, 2019
Schedule Of Available For Sale Securities [Line Items]    
Investment Securities, Available for sale, Fair Value, Less than 12 Months $ 70,685 $ 30,762
Investment Securities, Available for sale, Unrealized Loss, Less than 12 Months 376 15
Investment Securities, Available for sale, Fair Value, 12 Months or More   481
Investment Securities, Available for sale, Unrealized Loss, 12 Months or More   1
Investment Securities, Available for sale, Fair Value 70,685 31,243
Investment Securities, Available for sale, Unrealized Loss 376 16
U.S. Treasuries    
Schedule Of Available For Sale Securities [Line Items]    
Investment Securities, Available for sale, Fair Value, Less than 12 Months   30,762
Investment Securities, Available for sale, Unrealized Loss, Less than 12 Months   15
Investment Securities, Available for sale, Fair Value   30,762
Investment Securities, Available for sale, Unrealized Loss   15
Residential Mortgage-backed Securities    
Schedule Of Available For Sale Securities [Line Items]    
Investment Securities, Available for sale, Fair Value, Less than 12 Months 53,598  
Investment Securities, Available for sale, Unrealized Loss, Less than 12 Months 267  
Investment Securities, Available for sale, Fair Value, 12 Months or More   481
Investment Securities, Available for sale, Unrealized Loss, 12 Months or More   1
Investment Securities, Available for sale, Fair Value 53,598 481
Investment Securities, Available for sale, Unrealized Loss 267 $ 1
Corporate Bonds and Other Debt Securities    
Schedule Of Available For Sale Securities [Line Items]    
Investment Securities, Available for sale, Fair Value, Less than 12 Months 17,087  
Investment Securities, Available for sale, Unrealized Loss, Less than 12 Months 109  
Investment Securities, Available for sale, Fair Value 17,087  
Investment Securities, Available for sale, Unrealized Loss $ 109