Regulatory Matters (Tables)

12 Months Ended

Dec. 31, 2012

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, 2012 and 2011:

	Actual				Minimum Amounts For Capital Adequacy Purposes				Minimum Amounts To Be Well-Capitalized
	Amount		Ratio		Amount		Ratio		Amount		Ratio
As of December 31, 2012:
Total Capital  (to Risk Weighted Assets):
Arrow	$	200,480	16.3	%	$	98,395	8.0	%	$	122,994	10.0	%
Glens Falls National	164,889		16.2	%	81,427		8.0	%	101,783		10.0	%
Saratoga National	31,911		15.1	%	16,906		8.0	%	21,133		10.0	%
Tier I Capital  (to Risk Weighted Assets):
Arrow	185,170		15.0	%	49,379		4.0	%	74,068		6.0	%
Glens Falls National	152,205		14.9	%	40,860		4.0	%	61,291		6.0	%
Saratoga National	29,297		13.8	%	8,492		4.0	%	12,738		6.0	%
Tier I Capital  (to Average Assets):
Arrow	185,170		9.1	%	81,393		4.0	%	81,393		4.0	%
Glens Falls National	152,205		8.8	%	69,184		4.0	%	86,480		5.0	%
Saratoga National	29,297		9.4	%	12,467		4.0	%	15,584		5.0	%

	Actual				Minimum Amounts For Capital Adequacy Purposes			Minimum Amounts To Be Well-Capitalized
	Amount		Ratio		Amount	Ratio		Amount	Ratio
As of December 31, 2011:
Total Capital  (to Risk Weighted Assets):
Arrow	$	187,681	16.0	%	93,841	8.0	%	117,301	10.0	%
Glens Falls National	155,209		15.9	%	78,093	8.0	%	97,616	10.0	%
Saratoga National	29,853		15.0	%	15,922	8.0	%	19,902	10.0	%
Tier I Capital  (to Risk Weighted Assets):
Arrow	172,956		14.7	%	47,063	4.0	%	70,594	6.0	%
Glens Falls National	142,998		14.6	%	39,178	4.0	%	58,766	6.0	%
Saratoga National	27,365		13.8	%	7,932	4.0	%	11,898	6.0	%
Tier I Capital  (to Average Assets):
Arrow	172,956		9.0	%	76,869	4.0	%	76,869	4.0	%
Glens Falls National	142,998		8.6	%	66,511	4.0	%	83,138	5.0	%
Saratoga National	27,365		9.3	%	11,770	4.0	%	14,712	5.0	%