Loans (Summary Of Activity In Allowance For Loan And Lease Losses) (Details) - USD ($) $ in Thousands				3 Months Ended		9 Months Ended
	Sep. 17, 2021	Apr. 01, 2021	Jul. 01, 2020	Sep. 30, 2021	Sep. 30, 2020	Sep. 30, 2021	Sep. 30, 2020	Jun. 30, 2021	Dec. 31, 2020
Financing Receivable, Allowance for Credit Loss [Roll Forward]
Provision for Loan, Lease, and Other Losses				$ 8,994	$ 4,728	$ 7,333	$ 33,531
Off-Balance Sheet, Credit Loss, Liability				2,400		2,400		$ 2,200	$ 2,900
Financing Receivable, Allowance for Credit Loss, Purchased with Credit Deterioration, Increase				22,334		22,827	2,686
North Star Leasing
Financing Receivable, Allowance for Credit Loss [Roll Forward]
Financing Receivable, Allowance for Credit Loss, Purchased with Credit Deterioration, Increase	$ 500
Premier Financial Bancorp, Inc.
Financing Receivable, Allowance for Credit Loss [Roll Forward]
Provision for Loan, Lease, and Other Losses	11,000
Off-Balance Sheet, Credit Loss, Liability	400
Financing Receivable, Allowance for Credit Loss, Purchased with Credit Deterioration, Increase	22,334
Paycheck Protection Program [Member]
Financing Receivable, Allowance for Credit Loss [Roll Forward]
Ending balance				0		0
Construction
Financing Receivable, Allowance for Credit Loss [Roll Forward]
Beginning balance			$ 2,662	914	2,662	1,887
Provision for Loan, Lease, and Other Losses				(243)	(148)	(1,216)	1,863
Financing Receivable, Allowance for Credit Loss, Writeoff				0	0	0	0
Financing Receivable, Allowance for Credit Loss, Recovery				0	0	0	0
Ending balance				3,436	2,514	3,436	2,514
Financing Receivable, Allowance for Credit Loss, Purchased with Credit Deterioration, Increase				2,127		2,127	51
Construction | Premier Financial Bancorp, Inc.
Financing Receivable, Allowance for Credit Loss [Roll Forward]
Provision for Loan, Lease, and Other Losses	638
Financing Receivable, Allowance for Credit Loss, Purchased with Credit Deterioration, Increase	2,127
Commercial Real Estate Portfolio Segment [Member]
Financing Receivable, Allowance for Credit Loss [Roll Forward]
Beginning balance			19,148	17,233	19,148	17,536
Provision for Loan, Lease, and Other Losses				(179)	(8)	(325)	10,614
Financing Receivable, Allowance for Credit Loss, Writeoff				0	(109)	(161)	(254)
Financing Receivable, Allowance for Credit Loss, Recovery				4	4	8	126
Ending balance				35,816	19,035	35,816	19,035
Financing Receivable, Allowance for Credit Loss, Purchased with Credit Deterioration, Increase				13,374		13,374	1,356
Commercial Real Estate Portfolio Segment [Member] | Premier Financial Bancorp, Inc.
Financing Receivable, Allowance for Credit Loss [Roll Forward]
Provision for Loan, Lease, and Other Losses	5,384
Financing Receivable, Allowance for Credit Loss, Purchased with Credit Deterioration, Increase	13,374
Commercial Portfolio Segment
Financing Receivable, Allowance for Credit Loss [Roll Forward]
Beginning balance			10,106	8,686	10,106	12,763
Provision for Loan, Lease, and Other Losses				(3)	3,139	(3,800)	6,368
Financing Receivable, Allowance for Credit Loss, Writeoff				(654)	(146)	(952)	(1,098)
Financing Receivable, Allowance for Credit Loss, Recovery				4	0	22	2,009
Ending balance				13,378	13,099	13,378	13,099
Financing Receivable, Allowance for Credit Loss, Purchased with Credit Deterioration, Increase				4,286		4,286	860
Commercial Portfolio Segment | Premier Financial Bancorp, Inc.
Financing Receivable, Allowance for Credit Loss [Roll Forward]
Provision for Loan, Lease, and Other Losses	1,059
Premium finance
Financing Receivable, Allowance for Credit Loss [Roll Forward]
Beginning balance			0	998	0	1,095
Provision for Loan, Lease, and Other Losses				146	(2)	72
Financing Receivable, Allowance for Credit Loss, Writeoff				(7)	(2)	(30)
Financing Receivable, Allowance for Credit Loss, Recovery				0	0	0
Ending balance				1,137	986	1,137	986
Financing Receivable, Allowance for Credit Loss, Purchased with Credit Deterioration, Increase				0		0
Premium finance | Triumph Premium Finance [Member]
Financing Receivable, Allowance for Credit Loss [Roll Forward]
Provision for Loan, Lease, and Other Losses			990
Residential Portfolio Segment
Financing Receivable, Allowance for Credit Loss [Roll Forward]
Beginning balance			6,380	4,837	6,380	6,044
Provision for Loan, Lease, and Other Losses				(312)	(371)	(1,305)	1,626
Financing Receivable, Allowance for Credit Loss, Writeoff				(44)	(121)	(313)	(255)
Financing Receivable, Allowance for Credit Loss, Recovery				48	100	103	257
Ending balance				9,568	5,988	9,568	5,988
Financing Receivable, Allowance for Credit Loss, Purchased with Credit Deterioration, Increase				2,394		2,394	383
Residential Portfolio Segment | Premier Financial Bancorp, Inc.
Financing Receivable, Allowance for Credit Loss [Roll Forward]
Provision for Loan, Lease, and Other Losses	2,645
Home equity lines of credit
Financing Receivable, Allowance for Credit Loss [Roll Forward]
Beginning balance			1,755	1,504	1,755	1,860
Provision for Loan, Lease, and Other Losses				148	40	(196)	237
Financing Receivable, Allowance for Credit Loss, Writeoff				(180)	0	(196)	(23)
Financing Receivable, Allowance for Credit Loss, Recovery				37	2	41	11
Ending balance				2,224	1,797	2,224	1,797
Financing Receivable, Allowance for Credit Loss, Purchased with Credit Deterioration, Increase				41		41	2
Home equity lines of credit | Premier Financial Bancorp, Inc.
Financing Receivable, Allowance for Credit Loss [Roll Forward]
Provision for Loan, Lease, and Other Losses	674
Consumer, indirect
Financing Receivable, Allowance for Credit Loss [Roll Forward]
Beginning balance			12,293	8,841	12,293	8,030
Provision for Loan, Lease, and Other Losses				(2,308)	785	(891)	8,549
Financing Receivable, Allowance for Credit Loss, Writeoff				(416)	(370)	(1,190)	(1,427)
Financing Receivable, Allowance for Credit Loss, Recovery				43	64	211	261
Ending balance				6,160	12,772	6,160	12,772
Financing Receivable, Allowance for Credit Loss, Purchased with Credit Deterioration, Increase				0		0	0
Consumer, indirect | Premier Financial Bancorp, Inc.
Financing Receivable, Allowance for Credit Loss [Roll Forward]
Provision for Loan, Lease, and Other Losses	0
Consumer, direct
Financing Receivable, Allowance for Credit Loss [Roll Forward]
Beginning balance			1,941	1,161	1,941	1,081
Provision for Loan, Lease, and Other Losses				(362)	(78)	(252)	1,062
Financing Receivable, Allowance for Credit Loss, Writeoff				(29)	(15)	(96)	(128)
Financing Receivable, Allowance for Credit Loss, Recovery				17	13	54	37
Ending balance				1,079	1,861	1,079	1,861
Financing Receivable, Allowance for Credit Loss, Purchased with Credit Deterioration, Increase				112		112	34
Consumer, direct | Premier Financial Bancorp, Inc.
Financing Receivable, Allowance for Credit Loss [Roll Forward]
Provision for Loan, Lease, and Other Losses	180
Financing Receivable, Allowance for Credit Loss, Purchased with Credit Deterioration, Increase	112
Deposit account overdrafts
Financing Receivable, Allowance for Credit Loss [Roll Forward]
Beginning balance			77	53	77	63
Provision for Loan, Lease, and Other Losses				124	154	208	360
Financing Receivable, Allowance for Credit Loss, Writeoff				(135)	(202)	(327)	(534)
Financing Receivable, Allowance for Credit Loss, Recovery				37	47	135	156
Ending balance				79	76	79	76
Financing Receivable, Allowance for Credit Loss, Purchased with Credit Deterioration, Increase				0		0	0
Deposit account overdrafts | Premier Financial Bancorp, Inc.
Financing Receivable, Allowance for Credit Loss [Roll Forward]
Provision for Loan, Lease, and Other Losses	0
Total loans
Financing Receivable, Allowance for Credit Loss [Roll Forward]
Beginning balance			$ 54,362	47,942	54,362	50,359
Provision for Loan, Lease, and Other Losses				(1,888)	3,511	(6,255)	30,677
Financing Receivable, Allowance for Credit Loss, Writeoff				(1,896)	(965)	(4,221)	(3,721)
Financing Receivable, Allowance for Credit Loss, Recovery				310	230	804	2,857
Ending balance				77,382	$ 58,128	77,382	58,128
Total loans | Premier Financial Bancorp Inc and North Star Leasing
Financing Receivable, Allowance for Credit Loss [Roll Forward]
Provision for Loan, Lease, and Other Losses	10,600			10,580		13,868
Total loans | Triumph Premium Finance [Member]
Financing Receivable, Allowance for Credit Loss [Roll Forward]
Provision for Loan, Lease, and Other Losses							$ 990
Finance Leases Portfolio Segment
Financing Receivable, Allowance for Credit Loss [Roll Forward]
Beginning balance						3,715
Provision for Loan, Lease, and Other Losses				1,101
Financing Receivable, Allowance for Credit Loss, Writeoff						(431)
Financing Receivable, Allowance for Credit Loss, Recovery						120
Ending balance				4,505		4,505
Financing Receivable, Allowance for Credit Loss, Purchased with Credit Deterioration, Increase		$ 493		0		493
Finance Leases Portfolio Segment | North Star Leasing
Financing Receivable, Allowance for Credit Loss [Roll Forward]
Provision for Loan, Lease, and Other Losses		$ 3,288		$ 0
Commercial and industrial | Premier Financial Bancorp, Inc.
Financing Receivable, Allowance for Credit Loss [Roll Forward]
Financing Receivable, Allowance for Credit Loss, Purchased with Credit Deterioration, Increase	$ 4,286
North Star Leasing
Financing Receivable, Allowance for Credit Loss [Roll Forward]
Provision for Loan, Lease, and Other Losses						1,450
Financing Receivable, Allowance for Credit Loss, Writeoff						(956)
Financing Receivable, Allowance for Credit Loss, Recovery						$ 230