Parent Only Financial Information - Parent Only Balance Sheet (Details) - USD ($) $ in Thousands	Dec. 31, 2025	Dec. 31, 2024	Dec. 31, 2023
ASSETS
Interest-Bearing Deposits at Banks	$ 185,051	$ 127,124
Equity Securities	5,597	5,055
Other Assets	155,133	134,515
Total Assets	4,445,862	4,306,348
LIABILITIES
Junior Subordinated Obligations Issued to Unconsolidated Subsidiary Trusts	20,000	20,000
Other Liabilities	45,347	43,912
Total Liabilities	4,014,010	3,905,447
STOCKHOLDERS’ EQUITY
Total Stockholders’ Equity	431,852	400,901	$ 379,772
Total Liabilities and Stockholders’ Equity	4,445,862	4,306,348
Arrow
ASSETS
Interest-Bearing Deposits at Banks	530	333
Equity Securities	2,491	2,144
Investment in Subsidiaries at Equity	430,047	401,228
Other Assets	20,674	19,159
Total Assets	453,742	422,864
LIABILITIES
Junior Subordinated Obligations Issued to Unconsolidated Subsidiary Trusts	20,000	20,000
Other Liabilities	1,890	1,963
Total Liabilities	21,890	21,963
STOCKHOLDERS’ EQUITY
Total Stockholders’ Equity	431,852	400,901
Total Liabilities and Stockholders’ Equity	$ 453,742	$ 422,864