Regulatory Matters (Tables)

12 Months Ended

Dec. 31, 2015

Banking and Thrift [Abstract]

Schedule of Compliance with Regulatory Capital Requirements under Banking Regulations [Table Text Block]

Arrow’s and its subsidiary banks’, Glens Falls National Bank and Trust Company (“Glens Falls National”) and Saratoga National Bank and Trust Company (“Saratoga National”), actual capital amounts and ratios are presented in the table below as of December 31, 2015 and 2014:

	Actual				Minimum Amounts For Capital Adequacy Purposes				Minimum Amounts To Be Well-Capitalized
	Amount		Ratio		Amount		Ratio		Amount		Ratio
As of December 31, 2015:
Total Capital  (to Risk Weighted Assets):
Arrow	$	239,988	15.1	%	$	127,146	8.0	%	$	158,932	10.0	%
Glens Falls National	193,302		15.0	%	103,094		8.0	%	128,868		10.0	%
Saratoga National	37,658		12.6	%	23,910		8.0	%	29,887		10.0	%
Tier I Capital  (to Risk Weighted Assets):
Arrow	223,899		14.1	%	95,276		6.0	%	127,035		8.0	%
Glens Falls National	180,280		14.0	%	77,263		6.0	%	103,017		8.0	%
Saratoga National	34,642		11.6	%	17,918		6.0	%	23,891		8.0	%
Tier I Capital  (to Average Assets):
Arrow	223,899		9.3	%	96,301		4.0	%	120,376		5.0	%
Glens Falls National	180,280		8.9	%	81,025		4.0	%	101,281		5.0	%
Saratoga National	34,642		8.9	%	15,569		4.0	%	19,462		5.0	%
Common Equity Tier 1 Capital  (to Risk Weighted Assets):
Arrow	203,848		12.8	%	71,665		4.5	%	103,517		6.5	%
Glens Falls National	180,229		14.0	%	57,931		4.5	%	83,678		6.5	%
Saratoga National	34,642		11.6	%	13,439		4.5	%	19,411		6.5	%

	Actual				Minimum Amounts For Capital Adequacy Purposes				Minimum Amounts To Be Well-Capitalized
	Amount		Ratio		Amount		Ratio		Amount		Ratio
As of December 31, 2014:
Total Capital  (to Risk Weighted Assets):
Arrow	$	225,766	15.5	%	$	116,524	8.0	%	$	145,655	10.0	%
Glens Falls National	183,446		15.5	%	94,682		8.0	%	118,352		10.0	%
Saratoga National	35,217		13.3	%	21,183		8.0	%	26,479		10.0	%
Tier I Capital  (to Risk Weighted Assets):
Arrow	210,136		14.5	%	57,969		4.0	%	86,953		6.0	%
Glens Falls National	170,497		14.4	%	47,360		4.0	%	71,040		6.0	%
Saratoga National	32,596		12.3	%	10,600		4.0	%	15,900		6.0	%
Tier I Capital  (to Average Assets):
Arrow	210,136		9.4	%	89,420		4.0	%	89,420		4.0	%
Glens Falls National	170,497		9.1	%	74,944		4.0	%	93,680		5.0	%
Saratoga National	32,596		9.4	%	13,871		4.0	%	17,338		5.0	%