CAPITAL REQUIREMENTS (Details) $ in Thousands	Dec. 31, 2019 USD ($) category	Dec. 31, 2018 USD ($)
Banking and Thrift [Abstract]
Capital categories established by FDICIA (in categories) | category	5
Common Equity Tier I Capital (to Risk-weighted Assets), Ratio
To Be Well Capitalized (as a percent)	6.50%
Total Capital (to Risk-weighted Assets), Ratio
To Be Well Capitalized (as a percent)	10.00%
Tier I Capital (to Risk-weighted Assets), Ratio
To Be Well Capitalized (as a percent)	8.00%
Tier I Capital (to Average Assets), Ratio
To Be Well Capitalized (as a percent)	5.00%
Jersey Shore State Bank
Common Equity Tier I Capital (to Risk-weighted Assets), Amount
Actual	$ 99,317	$ 94,105
For Capital Adequacy Purposes	43,052	42,866
Minimum To Maintain Capital Conservation Buffer	66,970	60,727
To Be Well Capitalized	$ 62,187	$ 61,917
Common Equity Tier I Capital (to Risk-weighted Assets), Ratio
Actual (as a percent)	10.381%	9.879%
For Capital Adequacy Purposes (as a percent)	4.50%	4.50%
Minimum To Maintain Capital Conservation Buffer (as a percent)	7.00%	6.375%
To Be Well Capitalized (as a percent)	6.50%	6.50%
Total Capital (to Risk-weighted Assets), Amount
Actual	$ 106,093	$ 102,534
For Capital Adequacy Purposes	76,539	76,205
Minimum To Maintain Capital Conservation Buffer	100,458	94,066
To Be Well Capitalized	$ 95,674	$ 95,256
Total Capital (to Risk-weighted Assets), Ratio
Actual (as a percent)	11.089%	10.764%
For Capital Adequacy Purposes (as a percent)	8.00%	8.00%
Minimum To Maintain Capital Conservation Buffer (as a percent)	10.50%	9.875%
To Be Well Capitalized (as a percent)	10.00%	10.00%
Tier I Capital (to Risk-weighted Assets), Amount
Actual	$ 99,317	$ 94,105
For Capital Adequacy Purposes	57,403	57,155
Minimum To Maintain Capital Conservation Buffer	81,321	75,015
To Be Well Capitalized	$ 76,538	$ 76,206
Tier I Capital (to Risk-weighted Assets), Ratio
Actual (as a percent)	10.381%	9.879%
For Capital Adequacy Purposes (as a percent)	6.00%	6.00%
Minimum To Maintain Capital Conservation Buffer (as a percent)	8.50%	7.875%
To Be Well Capitalized (as a percent)	8.00%	8.00%
Tier I Capital (to Average Assets), Amount
Actual	$ 99,317	$ 94,105
For Capital Adequacy Purposes	48,501	48,734
To Be Well Capitalized	$ 60,626	$ 60,917
Tier I Capital (to Average Assets), Ratio
Actual (as a percent)	8.191%	7.724%
For Capital Adequacy Purposes (as a percent)	4.00%	4.00%
To Be Well Capitalized (as a percent)	5.00%	5.00%
Luzerne National Bank Corporation
Common Equity Tier I Capital (to Risk-weighted Assets), Amount
Actual	$ 38,340	$ 35,378
For Capital Adequacy Purposes	16,312	15,824
Minimum To Maintain Capital Conservation Buffer	25,374	22,417
To Be Well Capitalized	$ 23,562	$ 22,856
Common Equity Tier I Capital (to Risk-weighted Assets), Ratio
Actual (as a percent)	10.577%	10.061%
For Capital Adequacy Purposes (as a percent)	4.50%	4.50%
Minimum To Maintain Capital Conservation Buffer (as a percent)	7.00%	6.375%
To Be Well Capitalized (as a percent)	6.50%	6.50%
Total Capital (to Risk-weighted Assets), Amount
Actual	$ 40,940	$ 37,283
For Capital Adequacy Purposes	28,997	28,130
Minimum To Maintain Capital Conservation Buffer	38,058	34,723
To Be Well Capitalized	$ 36,246	$ 35,163
Total Capital (to Risk-weighted Assets), Ratio
Actual (as a percent)	11.295%	10.603%
For Capital Adequacy Purposes (as a percent)	8.00%	8.00%
Minimum To Maintain Capital Conservation Buffer (as a percent)	10.50%	9.875%
To Be Well Capitalized (as a percent)	10.00%	10.00%
Tier I Capital (to Risk-weighted Assets), Amount
Actual	$ 38,340	$ 35,378
For Capital Adequacy Purposes	21,749	21,098
Minimum To Maintain Capital Conservation Buffer	30,811	27,691
To Be Well Capitalized	$ 28,999	$ 28,131
Tier I Capital (to Risk-weighted Assets), Ratio
Actual (as a percent)	10.577%	10.061%
For Capital Adequacy Purposes (as a percent)	6.00%	6.00%
Minimum To Maintain Capital Conservation Buffer (as a percent)	8.50%	7.875%
To Be Well Capitalized (as a percent)	8.00%	8.00%
Tier I Capital (to Average Assets), Amount
Actual	$ 38,340	$ 35,378
For Capital Adequacy Purposes	17,723	16,350
To Be Well Capitalized	$ 22,154	$ 20,438
Tier I Capital (to Average Assets), Ratio
Actual (as a percent)	8.653%	8.655%
For Capital Adequacy Purposes (as a percent)	4.00%	4.00%
To Be Well Capitalized (as a percent)	5.00%	5.00%
Penns Woods Bancorp, Inc
Common Equity Tier I Capital (to Risk-weighted Assets), Amount
Actual	$ 140,372	$ 132,543
For Capital Adequacy Purposes	59,179	58,601
Minimum To Maintain Capital Conservation Buffer	92,056	83,018
To Be Well Capitalized	$ 85,480	$ 84,646
Common Equity Tier I Capital (to Risk-weighted Assets), Ratio
Actual (as a percent)	10.674%	10.178%
For Capital Adequacy Purposes (as a percent)	4.50%	4.50%
Minimum To Maintain Capital Conservation Buffer (as a percent)	7.00%	6.375%
To Be Well Capitalized (as a percent)	6.50%	6.50%
Total Capital (to Risk-weighted Assets), Amount
Actual	$ 149,748	$ 142,876
For Capital Adequacy Purposes	105,206	104,175
Minimum To Maintain Capital Conservation Buffer	138,083	128,591
To Be Well Capitalized	$ 131,508	$ 130,219
Total Capital (to Risk-weighted Assets), Ratio
Actual (as a percent)	11.387%	10.972%
For Capital Adequacy Purposes (as a percent)	8.00%	8.00%
Minimum To Maintain Capital Conservation Buffer (as a percent)	10.50%	9.875%
To Be Well Capitalized (as a percent)	10.00%	10.00%
Tier I Capital (to Risk-weighted Assets), Amount
Actual	$ 140,372	$ 132,543
For Capital Adequacy Purposes	78,905	78,135
Minimum To Maintain Capital Conservation Buffer	111,782	102,552
To Be Well Capitalized	$ 105,207	$ 104,180
Tier I Capital (to Risk-weighted Assets), Ratio
Actual (as a percent)	10.674%	10.178%
For Capital Adequacy Purposes (as a percent)	6.00%	6.00%
Minimum To Maintain Capital Conservation Buffer (as a percent)	8.50%	7.875%
To Be Well Capitalized (as a percent)	8.00%	8.00%
Tier I Capital (to Average Assets), Amount
Actual	$ 140,372	$ 132,543
For Capital Adequacy Purposes	65,949	64,845
To Be Well Capitalized	$ 82,436	$ 81,056
Tier I Capital (to Average Assets), Ratio
Actual (as a percent)	8.514%	8.176%
For Capital Adequacy Purposes (as a percent)	4.00%	4.00%
To Be Well Capitalized (as a percent)	5.00%	5.00%