SECURITIES - Available-for-sale Securities (Details) - USD ($)	Sep. 30, 2025	Dec. 31, 2024
Available-for-sale Securities
Allowance for credit losses	$ 0	$ 0
Available-for-sale securities, amortized cost	449,099,000	449,923,000
Available-for-sale securities, gross unrealized holding gains	803,000	263,000
Available-for-sale securities, gross unrealized holding losses	(34,589,000)	(47,806,000)
Available-for-sale debt securities, at fair value	415,313,000	402,380,000
Obligations of the U.S. Treasury
Available-for-sale Securities
Available-for-sale securities, amortized cost	8,052,000	8,067,000
Available-for-sale securities, gross unrealized holding gains	0	0
Available-for-sale securities, gross unrealized holding losses	(623,000)	(949,000)
Available-for-sale debt securities, at fair value	7,429,000	7,118,000
Obligations of U.S. Government agencies
Available-for-sale Securities
Available-for-sale securities, amortized cost	9,436,000	10,154,000
Available-for-sale securities, gross unrealized holding gains	0	0
Available-for-sale securities, gross unrealized holding losses	(766,000)	(1,129,000)
Available-for-sale debt securities, at fair value	8,670,000	9,025,000
Bank holding company debt securities
Available-for-sale Securities
Available-for-sale securities, amortized cost	28,963,000	28,958,000
Available-for-sale securities, gross unrealized holding gains	0	0
Available-for-sale securities, gross unrealized holding losses	(2,672,000)	(3,712,000)
Available-for-sale debt securities, at fair value	26,291,000	25,246,000
Obligations Of States And Political Subdivisions Tax Exempt
Available-for-sale Securities
Available-for-sale securities, amortized cost	105,922,000	111,995,000
Available-for-sale securities, gross unrealized holding gains	275,000	238,000
Available-for-sale securities, gross unrealized holding losses	(8,669,000)	(10,931,000)
Available-for-sale debt securities, at fair value	97,528,000	101,302,000
Obligations Of States And Political Subdivisions Taxable
Available-for-sale Securities
Available-for-sale securities, amortized cost	50,373,000	51,147,000
Available-for-sale securities, gross unrealized holding gains	1,000	0
Available-for-sale securities, gross unrealized holding losses	(6,512,000)	(8,641,000)
Available-for-sale debt securities, at fair value	43,862,000	42,506,000
Residential Passthrough Securities
Available-for-sale Securities
Available-for-sale securities, amortized cost	107,771,000	104,378,000
Available-for-sale securities, gross unrealized holding gains	451,000	6,000
Available-for-sale securities, gross unrealized holding losses	(6,287,000)	(9,970,000)
Available-for-sale debt securities, at fair value	101,935,000	94,414,000
Residential Collateralized Mortgage Obligations
Available-for-sale Securities
Available-for-sale securities, amortized cost	54,678,000	53,389,000
Available-for-sale securities, gross unrealized holding gains	52,000	10,000
Available-for-sale securities, gross unrealized holding losses	(2,310,000)	(3,505,000)
Available-for-sale debt securities, at fair value	52,420,000	49,894,000
Commercial Mortgage Backed Securities
Available-for-sale Securities
Available-for-sale securities, amortized cost	72,433,000	73,470,000
Available-for-sale securities, gross unrealized holding gains	13,000	0
Available-for-sale securities, gross unrealized holding losses	(6,749,000)	(8,969,000)
Available-for-sale debt securities, at fair value	65,697,000	64,501,000
Private label commercial mortgage-backed securities
Available-for-sale Securities
Available-for-sale securities, amortized cost	3,471,000	8,365,000
Available-for-sale securities, gross unrealized holding gains	0	9,000
Available-for-sale securities, gross unrealized holding losses	0	0
Available-for-sale debt securities, at fair value	3,471,000	$ 8,374,000
Asset-backed securities, Collateralized loan obligations
Available-for-sale Securities
Available-for-sale securities, amortized cost	8,000,000
Available-for-sale securities, gross unrealized holding gains	11,000
Available-for-sale securities, gross unrealized holding losses	(1,000)
Available-for-sale debt securities, at fair value	$ 8,010,000

CITIZENS & NORTHERN CORP 10-Q