Regulatory Restrictions and Capital Adequacy (Tables)

12 Months Ended

Dec. 31, 2021

Broker-Dealer, Net Capital Requirement, SEC Regulation [Abstract]

Schedule of Capital Amount and Ratio Considered to be Capitalized

as set forth in the tables below:

	Actual				Minimum Capital Required				Required to be Considered Well Capitalized
	Capital Amount		Ratio		Capital Amount		Ratio		Capital Amount		Ratio
	(dollars in thousands)
As of December 31, 2021
Total Capital to Risk Weighted Assets
First Commonwealth Financial Corporation	$	1,071,965	14.64	%	$	768,723	10.50	%	$	732,118	10.00	%
First Commonwealth Bank	1,041,854		14.26		767,321		10.50		730,782		10.00
Tier I Capital to Risk Weighted Assets
First Commonwealth Financial Corporation	$	894,670	12.22	%	$	622,300	8.50	%	$	585,694	8.00	%
First Commonwealth Bank	864,559		11.83		621,165		8.50		584,626		8.00
Tier I Capital to Average Assets
First Commonwealth Financial Corporation	$	894,670	9.73	%	$	367,656	4.00	%	$	459,570	5.00	%
First Commonwealth Bank	864,559		9.43		366,839		4.00		458,549		5.00
Common Equity Tier I to Risk Weighted Assets
First Commonwealth Financial Corporation	$	824,670	11.26	%	$	512,482	7.00	%	$	475,876	6.50	%
First Commonwealth Bank	864,559		11.83		511,547		7.00		475,008		6.50

	Actual				Minimum Capital Required				Required to be Considered Well Capitalized
	Capital Amount		Ratio		Capital Amount		Ratio		Capital Amount		Ratio
	(dollars in thousands)
As of December 31, 2020
Total Capital to Risk Weighted Assets
First Commonwealth Financial Corporation	$	1,010,608	14.88	%	$	713,289	10.50	%	$	679,323	10.00	%
First Commonwealth Bank	974,911		14.36		712,995		10.50		679,043		10.00
Tier I Capital to Risk Weighted Assets
First Commonwealth Financial Corporation	$	827,231	12.18	%	$	577,424	8.50	%	$	543,458	8.00	%
First Commonwealth Bank	791,568		11.66		577,186		8.50		543,234		8.00
Tier I Capital to Average Assets
First Commonwealth Financial Corporation	$	827,231	9.40	%	$	352,023	4.00	%	$	440,029	5.00	%
First Commonwealth Bank	791,568		9.01		351,244		4.00		439,055		5.00
Common Equity Tier I to Risk Weighted Assets
First Commonwealth Financial Corporation	$	757,231	11.15	%	$	475,526	7.00	%	$	441,560	6.50	%
First Commonwealth Bank	791,568		11.66		475,330		7.00		441,378		6.50