Related Party Transactions	9 Months Ended
	Sep. 30, 2023
Related Party Transactions [Abstract]
Related Party Transactions	RELATED PARTY TRANSACTIONSA member of the GFNB Board of Directors, is the Chief Executive Officer of the general contractor leading the multi-year renovation project to enhance and improve the downtown Glens Falls Main Campus. The recently completed reconstruction provides added energy efficiency and more collaborative work space. Through September 30, 2023, Arrow paid $2.70 million to this general contractor. GFNB is a subsidiary of Arrow.