Regulatory Matters (Details) - USD ($) $ in Thousands	Dec. 31, 2015	Dec. 31, 2014
Parent Company [Member]
Compliance with Regulatory Capital Requirements under Banking Regulations [Line Items]
Total Capital (to Risk Weighted Assets) - Actual Amount	$ 239,988	$ 225,766
Total Capital (to Risk Weighted Assets) - Actual Ratio	15.10%	15.50%
Total Capital (to Risk Weighted Assets) - Minimum Amounts For Capital Adequacy Purposes Amount	$ 127,146	$ 116,524
Total Capital (to Risk Weighted Assets) - Minimum Amounts For Capital Adequacy Purposes Ratio	8.00%	8.00%
Total Capital (to Risk Weighted Assets) - Minimum Amounts To Be Well-Capitalized Amount	$ 158,932	$ 145,655
Total Capital (to Risk Weighted Assets) - Minimum Amounts To Be Well-Capitalized Ratio	10.00%	10.00%
Tier I Capital (to Risk Weighted Assets) - Actual Amount	$ 223,899	$ 210,136
Tier I Capital (to Risk Weighted Assets) - Actual Ratio	14.10%	14.50%
Tier I Capital (to Risk Weighted Assets) - Minimum Acounts For Capital Adequacy Purposes Amount	$ 95,276	$ 57,969
Tier I Capital (to Risk Weighted Assets) - Minimum Amounts For Capital Adequacy Purposes Ratio	6.00%	4.00%
Tier I Capital (to Risk Weighted Assets) - Minimum Amounts To Be Well-Capitalized Ratio	$ 127,035	$ 86,953
Tier One Risk Based Capital Required to be Well Capitalized to Risk Weighted Assets	8.00%	6.00%
Tier One Risk Based Capital	$ 223,899	$ 210,136
Tier One Leverage Capital to Average Assets	9.30%	9.40%
Tier One Leverage Capital Required for Capital Adequacy	$ 96,301	$ 89,420
Tier One Leverage Capital Required for Capital Adequacy to Average Assets	4.00%	4.00%
Tier One Leverage Capital Required to be Well Capitalized	$ 120,376	$ 89,420
Tier One Leverage Capital Required to be Well Capitalized to Average Assets	5.00%	4.00%
Common Equity Tier 1 Capital Ratio	$ 203,848
Common Equity Tier 1 Capital Ratio Percentage	12.80%
Common Equity Tier 1 Capital Ratio Required for Capital Adequacy	$ 71,665
Common Equity Tier 1 Capital Ratio For Capital Adequacy	4.50%
Common Equity Tier 1 Leverage Capital Required to be Well Capitalized	$ 103,517
Common Equity Tier 1 Capital Ratio to be Well Capitalized	6.50%
Glens Falls National [Member]
Compliance with Regulatory Capital Requirements under Banking Regulations [Line Items]
Total Capital (to Risk Weighted Assets) - Actual Amount	$ 193,302	$ 183,446
Total Capital (to Risk Weighted Assets) - Actual Ratio	15.00%	15.50%
Total Capital (to Risk Weighted Assets) - Minimum Amounts For Capital Adequacy Purposes Amount	$ 103,094	$ 94,682
Total Capital (to Risk Weighted Assets) - Minimum Amounts For Capital Adequacy Purposes Ratio	8.00%	8.00%
Total Capital (to Risk Weighted Assets) - Minimum Amounts To Be Well-Capitalized Amount	$ 128,868	$ 118,352
Total Capital (to Risk Weighted Assets) - Minimum Amounts To Be Well-Capitalized Ratio	10.00%	10.00%
Tier I Capital (to Risk Weighted Assets) - Actual Amount	$ 180,280	$ 170,497
Tier I Capital (to Risk Weighted Assets) - Actual Ratio	14.00%	14.40%
Tier I Capital (to Risk Weighted Assets) - Minimum Acounts For Capital Adequacy Purposes Amount	$ 77,263	$ 47,360
Tier I Capital (to Risk Weighted Assets) - Minimum Amounts For Capital Adequacy Purposes Ratio	6.00%	4.00%
Tier I Capital (to Risk Weighted Assets) - Minimum Amounts To Be Well-Capitalized Ratio	$ 103,017	$ 71,040
Tier One Risk Based Capital Required to be Well Capitalized to Risk Weighted Assets	8.00%	6.00%
Tier One Risk Based Capital	$ 180,280	$ 170,497
Tier One Leverage Capital to Average Assets	8.90%	9.10%
Tier One Leverage Capital Required for Capital Adequacy	$ 81,025	$ 74,944
Tier One Leverage Capital Required for Capital Adequacy to Average Assets	4.00%	4.00%
Tier One Leverage Capital Required to be Well Capitalized	$ 101,281	$ 93,680
Tier One Leverage Capital Required to be Well Capitalized to Average Assets	5.00%	5.00%
Common Equity Tier 1 Capital Ratio	$ 180,229
Common Equity Tier 1 Capital Ratio Percentage	14.00%
Common Equity Tier 1 Capital Ratio Required for Capital Adequacy	$ 57,931
Common Equity Tier 1 Capital Ratio For Capital Adequacy	4.50%
Common Equity Tier 1 Leverage Capital Required to be Well Capitalized	$ 83,678
Common Equity Tier 1 Capital Ratio to be Well Capitalized	6.50%
Saratoga National [Member]
Compliance with Regulatory Capital Requirements under Banking Regulations [Line Items]
Total Capital (to Risk Weighted Assets) - Actual Amount	$ 37,658	$ 35,217
Total Capital (to Risk Weighted Assets) - Actual Ratio	12.60%	13.30%
Total Capital (to Risk Weighted Assets) - Minimum Amounts For Capital Adequacy Purposes Amount	$ 23,910	$ 21,183
Total Capital (to Risk Weighted Assets) - Minimum Amounts For Capital Adequacy Purposes Ratio	8.00%	8.00%
Total Capital (to Risk Weighted Assets) - Minimum Amounts To Be Well-Capitalized Amount	$ 29,887	$ 26,479
Total Capital (to Risk Weighted Assets) - Minimum Amounts To Be Well-Capitalized Ratio	10.00%	10.00%
Tier I Capital (to Risk Weighted Assets) - Actual Amount	$ 34,642	$ 32,596
Tier I Capital (to Risk Weighted Assets) - Actual Ratio	11.60%	12.30%
Tier I Capital (to Risk Weighted Assets) - Minimum Acounts For Capital Adequacy Purposes Amount	$ 17,918	$ 10,600
Tier I Capital (to Risk Weighted Assets) - Minimum Amounts For Capital Adequacy Purposes Ratio	6.00%	4.00%
Tier I Capital (to Risk Weighted Assets) - Minimum Amounts To Be Well-Capitalized Ratio	$ 23,891	$ 15,900
Tier One Risk Based Capital Required to be Well Capitalized to Risk Weighted Assets	8.00%	6.00%
Tier One Risk Based Capital	$ 34,642	$ 32,596
Tier One Leverage Capital to Average Assets	8.90%	9.40%
Tier One Leverage Capital Required for Capital Adequacy	$ 15,569	$ 13,871
Tier One Leverage Capital Required for Capital Adequacy to Average Assets	4.00%	4.00%
Tier One Leverage Capital Required to be Well Capitalized	$ 19,462	$ 17,338
Tier One Leverage Capital Required to be Well Capitalized to Average Assets	5.00%	5.00%
Common Equity Tier 1 Capital Ratio	$ 34,642
Common Equity Tier 1 Capital Ratio Percentage	11.60%
Common Equity Tier 1 Capital Ratio Required for Capital Adequacy	$ 13,439
Common Equity Tier 1 Capital Ratio For Capital Adequacy	4.50%
Common Equity Tier 1 Leverage Capital Required to be Well Capitalized	$ 19,411
Common Equity Tier 1 Capital Ratio to be Well Capitalized	6.50%