Regulatory Matters (Tables)

12 Months Ended

Dec. 31, 2018

Banking and Thrift [Abstract]

Schedule of Compliance with Regulatory Capital Requirements under Banking Regulations

The actual capital amounts and ratios for Arrow and its subsidiary banks, Glens Falls National Bank and Trust Company (“Glens Falls National”) and Saratoga National Bank and Trust Company (“Saratoga National”), are presented in the table below as of December 31, 2018 and 2017:

	Actual				Minimum Amounts For Capital Adequacy Purposes (including "capital conservation buffer")				Minimum Amounts To Be Well-Capitalized
	Amount		Ratio		Amount		Ratio		Amount		Ratio
As of December 31, 2018
Total Capital  (to Risk Weighted Assets):
Arrow	$	304,109	14.9	%	$	202,059	9.9	%	$	204,100	10.0	%
Glens Falls National	237,238		14.4	%	163,101		9.9	%	164,749		10.0	%
Saratoga National	56,483		14.2	%	39,379		9.9	%	39,777		10.0	%
Tier I Capital  (to Risk Weighted Assets):
Arrow	283,913		13.9	%	161,361		7.9	%	163,403		8.0	%
Glens Falls National	220,844		13.4	%	130,199		7.9	%	131,847		8.0	%
Saratoga National	52,681		13.2	%	31,529		7.9	%	31,928		8.0	%
Tier I Capital  (to Average Assets):
Arrow	283,913		9.6	%	118,297		4.0	%	147,871		5.0	%
Glens Falls National	220,844		9.1	%	97,074		4.0	%	121,343		5.0	%
Saratoga National	52,681		9.6	%	21,950		4.0	%	27,438		5.0	%
Common Equity Tier 1 Capital  (to Risk Weighted Assets):
Arrow	263,863		12.9	%	130,909		6.4	%	132,954		6.5	%
Glens Falls National	220,794		13.4	%	105,454		6.4	%	107,102		6.5	%
Saratoga National	52,681		13.2	%	25,542		6.4	%	25,941		6.5	%
As of December 31, 2017
Total Capital  (to Risk Weighted Assets):
Arrow	278,163		15.0	%	172,461		9.3	%	185,442		10.0	%
Glens Falls National	220,275		14.6	%	140,312		9.3	%	150,873		10.0	%
Saratoga National	48,822		14.0	%	32,432		9.3	%	34,873		10.0	%
Tier I Capital  (to Risk Weighted Assets):
Arrow	259,378		14.0	%	135,247		7.3	%	148,216		8.0	%
Glens Falls National	205,200		13.6	%	110,144		7.3	%	120,706		8.0	%
Saratoga National	45,311		13.0	%	25,444		7.3	%	27,884		8.0	%
Tier I Capital  (to Average Assets):
Arrow	259,378		9.5	%	109,212		4.0	%	136,515		5.0	%
Glens Falls National	205,200		9.1	%	90,198		4.0	%	112,747		5.0	%
Saratoga National	45,311		9.4	%	19,281		4.0	%	24,102		5.0	%
Common Equity Tier 1 Capital  (to Risk Weighted Assets):
Arrow	239,326		12.9	%	107,604		5.8	%	120,591		6.5	%
Glens Falls National	205,148		13.6	%	87,490		5.8	%	98,049		6.5	%
Saratoga National	45,311		13.0	%	20,216		5.8	%	22,656		6.5	%