Regulatory Matters (Tables)

12 Months Ended

Dec. 31, 2021

Deposits [Abstract]

Schedule of Regulatory Capital Ratios Under the Basel III Regulatory Capital Framework

As of December 31, 2021 and 2020, the regulatory capital ratios of the Company and Bank under the Basel III regulatory capital framework are as follows:

	Actual					Minimum Capital Required-Basel III Fully Phased-In*					Required to be Considered Well- Capitalized
As of December 31, 2021:	Amount		Ratio			Amount		Ratio			Amount		Ratio
Total Capital to Risk-Weighted Assets:
Consolidated	$	1,425,907		20.34	%	$	736,003		10.50	%	$	700,955		10.00	%
First Financial Bank, N.A	$	1,258,965		17.99	%	$	734,604		10.50	%	$	699,623		10.00	%
Tier 1 Capital to Risk-Weighted Assets:
Consolidated	$	1,356,006		19.35	%	$	595,812		8.50	%	$	420,573		6.00	%
First Financial Bank, N.A	$	1,189,064		17.00	%	$	594,679		8.50	%	$	559,698		8.00	%
Common Equity Tier 1 Capital to Risk-Weighted Assets:
Consolidated	$	1,356,006		19.35	%	$	490,669		7.00	%		—	N/A
First Financial Bank, N.A	$	1,189,064		17.00	%	$	489,736		7.00	%	$	454,755		6.50	%
Leverage Ratio:
Consolidated	$	1,356,006		11.13	%	$	487,459		4.00	%		—	N/A
First Financial Bank, N.A	$	1,189,064		9.79	%	$	485,926		4.00	%	$	607,407		5.00	%

*At December 31, 2021 the Capital Conservative Buffer Basel III has been fully phased-in.

	Actual					Minimum Capital Required-Basel III Fully Phased-In*					Required to be Considered Well- Capitalized
As of December 31, 2020:	Amount		Ratio			Amount		Ratio			Amount		Ratio
Total Capital to Risk-Weighted Assets:
Consolidated	$	1,273,749		22.03	%	$	607,038		10.50	%	$	578,131		10.00	%
First Financial Bank, N.A	$	1,123,275		19.47	%	$	605,830		10.50	%	$	576,981		10.00	%
Tier 1 Capital to Risk-Weighted Assets:
Consolidated	$	1,201,729		20.79	%	$	491,412		8.50	%	$	346,879		6.00	%
First Financial Bank, N.A	$	1,051,255		18.22	%	$	490,434		8.50	%	$	461,585		8.00	%
Common Equity Tier 1 Capital to Risk-Weighted Assets:
Consolidated	$	1,201,729		20.79	%	$	404,692		7.00	%		—	N/A
First Financial Bank, N.A	$	1,051,255		18.22	%	$	403,887		7.00	%	$	375,038		6.50	%
Leverage Ratio:
Consolidated	$	1,201,729		11.86	%	$	405,268		4.00	%		—	N/A
First Financial Bank, N.A	$	1,051,255		10.41	%	$	404,002		4.00	%	$	505,002		5.00	%