Shareholders' Equity

6 Months Ended

Jun. 30, 2022

Equity [Abstract]

Shareholders' Equity

13. Shareholders’ Equity

As of June 30, 2022 and December 31, 2021, the Company and the Bank met all applicable minimum capital requirements and were considered “well-capitalized” by both the Federal Reserve Bank (“FRB”) and the Federal Deposit Insurance Corporation (“FDIC”).

	Actual					Minimum Capital Required For Capital Adequacy Plus Capital Conservation Buffer					Minimum To Be Well-Capitalized Under Prompt Corrective Action Provisions
	Amount		Ratio			Amount		Ratio			Amount		Ratio
	(dollars in thousands)
At June 30, 2022
Cambridge Bancorp:
Total capital (to risk-weighted assets)	$	438,979		13.4	%	$	344,617		10.5	%	N/A		N/A
Tier 1 capital (to risk-weighted assets)		403,484		12.3	%		278,976		8.5	%	N/A		N/A
Common equity tier I capital (to risk-weighted assets)		403,484		12.3	%		229,745		7.0	%	N/A		N/A
Tier 1 capital (to average assets)		403,484		8.1	%		199,142		4.0	%	N/A		N/A
Cambridge Trust Company:
Total capital (to risk-weighted assets)	$	422,899		12.9	%	$	344,585		10.5	%	$	328,176		10.0	%
Tier 1 capital (to risk-weighted assets)		387,404		11.8	%		278,950		8.5	%		262,541		8.0	%
Common equity tier I capital (to risk-weighted assets)		387,404		11.8	%		229,723		7.0	%		213,314		6.5	%
Tier 1 capital (to average assets)		387,404		7.8	%		199,131		4.0	%		248,913		5.0	%

	Actual					Minimum Capital Required For Capital Adequacy Plus Capital Conservation Buffer					Minimum To Be Well-Capitalized Under Prompt Corrective Action Provisions
	Amount		Ratio			Amount		Ratio			Amount		Ratio
	(dollars in thousands)
At December 31, 2021
Cambridge Bancorp:
Total capital (to risk-weighted assets)	$	420,398		13.6	%	$	325,617		10.5	%	N/A		N/A
Tier 1 capital (to risk-weighted assets)		384,518		12.4	%		263,595		8.5	%	N/A		N/A
Common equity tier I capital (to risk-weighted assets)		384,518		12.4	%		217,078		7.0	%	N/A		N/A
Tier 1 capital (to average assets)		384,518		8.3	%		185,015		4.0	%	N/A		N/A
Cambridge Trust Company:
Total capital (to risk-weighted assets)	$	409,806		13.2	%	$	325,587		10.5	%	$	310,082		10.0	%
Tier 1 capital (to risk-weighted assets)		373,926		12.1	%		263,570		8.5	%		248,066		8.0	%
Common equity tier I capital (to risk-weighted assets)		373,926		12.1	%		217,058		7.0	%		201,554		6.5	%
Tier 1 capital (to average assets)		373,926		8.1	%		185,003		4.0	%		231,254		5.0	%