Securities -Schedule of Fair Value and Associated Gross Unrealized Losses on AFS Debt Securities by Length of Time in Continuous Loss (Details) - USD ($) $ in Thousands	Sep. 30, 2021	Dec. 31, 2020
Securities [Line Items]
Fair Value, Less Than 12 Months	$ 67,897	$ 16,682
Gross Unrealized Losses, Less Than 12 Months	(698)	(57)
Fair Value, 12 Months or Longer	2,626	0
Gross Unrealized Losses, 12 Months or Longer	(20)	0
Total Fair Value	70,523	16,682
Total Gross Unrealized Losses	(718)	(57)
Residential mortgage-backed securities
Securities [Line Items]
Fair Value, Less Than 12 Months	20,201	3,089
Gross Unrealized Losses, Less Than 12 Months	(136)	(7)
Fair Value, 12 Months or Longer	0	0
Gross Unrealized Losses, 12 Months or Longer	0	0
Total Fair Value	20,201	3,089
Total Gross Unrealized Losses	(136)	(7)
Residential collateralized mortgage obligations
Securities [Line Items]
Fair Value, Less Than 12 Months	47,696	13,593
Gross Unrealized Losses, Less Than 12 Months	(562)	(50)
Fair Value, 12 Months or Longer	2,626	0
Gross Unrealized Losses, 12 Months or Longer	(20)	0
Total Fair Value	50,322	13,593
Total Gross Unrealized Losses	$ (582)	$ (50)