Stock Based Compensation (Tables)

6 Months Ended

Jun. 30, 2022

Schedule of Shares Issued and Fair Value of RSAs, RSUs

During the three and six months ended June 30, 2022, the Company issued the following RSAs and RSUs pursuant to the Cambridge Bancorp 2017 Equity and Cash Incentive Plan (the “2017 Plan”). RSAs time-vest either over a three-year or five-year period. RSUs vest over a three-year-period. The fair value of RSAs and RSUs are based upon the closing price of the Company's common stock on the date of the applicable grant. The holders of RSAs participate fully in the rewards of stock ownership of the Company, including voting and dividend rights. The holders of RSUs do not participate in the rewards of stock ownership of the Company until vested.

Three Months Ended June 30, 2022
		Weighted-Average
Shares Granted		Fair Value at Grant Date		Type of Award
	1,169	$	78.53	RSAs

Six Months ended June 30, 2022
		Weighted-Average
Shares Granted		Fair Value at Grant Date		Type of Award
	12,934	$	87.31	RSAs
	8,796	$	88.18	RSUs

Schedule of Pre-tax Expense Associated with All Outstanding Non-vested RSAs, RSUs, Performance Based Restricted Stock Units and Related Tax Benefits

The following table presents the pre-tax expense associated with all outstanding non-vested RSAs, RSUs, and PRSUs, and the related tax benefits recognized:

	Three Months Ended June 30,				Six Months Ended June 30,
	2022		2021		2022		2021
	(dollars in thousands)
Share based compensation expense	$	943	$	1,138	$	1,591	$	2,513
Related tax benefits	$	263	$	318	$	444	$	702

Performance-Based Restricted Stock Units

Schedule of Shares Issued and Fair Value of RSAs, RSUs

There were no PRSUs granted during the three months ended June 30, 2022. During the six months ended June 30, 2022, the Company granted 30,895 PRSUs from the 2017 Plan, as shown in the table below. PRSUs are subject to a three-year performance period and are earned based on two factors: (i) operating return on assets and (ii) operating diluted earnings per share growth as compared to the Company’s established peer indices as defined in the Company’s 2022 Proxy Statement filed with the SEC on March 16, 2022.

Six Months ended June 30, 2022
		Weighted-Average
Shares Granted		Fair Value at Grant Date		Type of Award
	30,895	$	88.18	PRSUs