Regulatory Restrictions and Capital Adequacy (Tables)

12 Months Ended

Dec. 31, 2015

Regulatory Capital Requirements [Abstract]

Schedule of Capital Amount and Ratio Considered to be Capitalized

To be considered well-capitalized, the Company must maintain minimum Total risk-based capital, Tier I risk-based capital, Tier I leverage ratio and Common Equity tier I as set forth in the table below:

	Actual				Minimum Capital Required - Basel III Phase-In Schedule				Minimum Capital Required - Basel III Fully Phased-In				Required to be Considered Well Capitalized
	Capital Amount		Ratio		Capital Amount		Ratio		Capital Amount		Ratio		Capital Amount		Ratio
	(dollars in thousands)
As of December 31, 2015
Total Capital to Risk Weighted Assets
First Commonwealth Financial Corporation	$	682,199	12.25	%	$	445,650	8.00	%	$	584,915	10.50	%	$	557,062	10.00	%
First Commonwealth Bank	656,244		11.78		445,642		8.00		584,905		10.50		557,052		10.00
Tier I Capital to Risk Weighted Assets
First Commonwealth Financial Corporation	$	626,939	11.25	%	$	334,237	6.00	%	$	473,503	8.50	%	$	445,650	8.00	%
First Commonwealth Bank	600,984		10.79		334,231		6.00		473,494		8.50		445,642		8.00
Tier I Capital to Average Assets
First Commonwealth Financial Corporation	$	626,939	9.85	%	$	254,631	4.00	%	$	254,631	4.00	%	$	318,289	5.00	%
First Commonwealth Bank	600,984		9.46		254,095		4.00		254,095		4.00		317,618		5.00
Common Equity Tier I to Risk Weighted Assets
First Commonwealth Financial Corporation	$	556,939	10.00	%	$	250,678	4.50	%	$	389,944	7.00	%	$	362,091	6.50	%
First Commonwealth Bank	535,814		9.62		250,673		4.50		389,937		7.00		362,084		6.50

At December 31, 2014, First Commonwealth and First Commonwealth Bank met all capital adequacy requirements to which they were subject. The following table presents actual and required capital ratios as of December 31, 2014 under the regulatory capital rules then in effect.

	Actual				Regulatory Minimum				Well Capitalized Regulatory Guidelines
	Capital Amount		Ratio		Capital Amount		Ratio		Capital Amount		Ratio
	(dollars in thousands)
As of December 31, 2014
Total Capital to Risk Weighted Assets
First Commonwealth Financial Corporation	$	662,733	12.79	%	$	414,460	8.00	%	N/A		N/A
First Commonwealth Bank	647,500		12.48		415,217		8.00		$	519,021	10.00	%
Tier I Capital to Risk Weighted Assets
First Commonwealth Financial Corporation	$	607,602	11.73	%	$	207,230	4.00	%	N/A		N/A
First Commonwealth Bank	592,369		11.41		207,608		4.00		$	311,413	6.00	%
Tier I Capital to Average Assets
First Commonwealth Financial Corporation	$	607,602	9.85	%	$	246,738	4.00	%	N/A		N/A
First Commonwealth Bank	592,369		9.66		245,276		4.00		$	306,595	5.00	%