Regulatory Matters (Tables)

12 Months Ended

Dec. 31, 2021

Regulatory Capital Requirements Under Banking Regulations [Abstract]

Schedule of minimum amounts required for capital adequacy purposes

Regulatory capital ratios at December 31, 2021 and 2020, along with the minimum amounts required for capital adequacy purposes and to be well-capitalized under prompt corrective action provisions in effect at such times are presented below for United and the Bank (dollars in thousands):

	Basel III Guidelines				United Community Banks, Inc. (consolidated)						United Community Bank
	Minimum (1)		Well Capitalized		2021			2020			2021			2020
Risk-based ratios:
CET1 capital	4.5	%	6.5	%	12.46		%	12.31		%	12.87		%	13.31		%
Tier 1 capital	6.0		8.0		13.17			13.10			12.87			13.31
Total capital	8.0		10.0		14.65			15.15			13.46			14.28
Tier 1 leverage ratio	4.0		5.0		8.75			9.28			8.53			9.42
CET1 capital					$	1,688,176		$	1,506,750		$	1,738,557		$	1,625,292
Tier 1 capital					1,784,598			1,603,172			1,738,557			1,625,292
Total capital					1,984,376			1,854,368			1,818,335			1,743,045
RWAs					13,548,534			12,240,440			13,512,405			12,207,940
Average total assets					20,402,842			17,276,853			20,377,319			17,246,878

(1) As of December 31, 2021 and 2020, the additional capital conservation buffer in effect was 2.50%.