Regulatory Restrictions and Capital Adequacy (Tables)

12 Months Ended

Dec. 31, 2022

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, 2022
Total Capital to Risk Weighted Assets
First Commonwealth Financial Corporation	$	1,160,053	14.36	%	$	848,288	10.50	%	$	807,893	10.00	%
First Commonwealth Bank	1,100,529		13.65		846,593		10.50		806,279		10.00
Tier I Capital to Risk Weighted Assets
First Commonwealth Financial Corporation	$	966,072	11.96	%	$	686,709	8.50	%	$	646,314	8.00	%
First Commonwealth Bank	906,548		11.24		685,337		8.50		645,023		8.00
Tier I Capital to Average Assets
First Commonwealth Financial Corporation	$	966,072	10.18	%	$	379,527	4.00	%	$	474,408	5.00	%
First Commonwealth Bank	906,548		9.58		378,578		4.00		473,223		5.00
Common Equity Tier I to Risk Weighted Assets
First Commonwealth Financial Corporation	$	896,072	11.09	%	$	565,525	7.00	%	$	525,131	6.50	%
First Commonwealth Bank	906,548		11.24		564,395		7.00		524,081		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, 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