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ACNB CORPORATION (PARENT COMPANY ONLY) FINANCIAL INFORMATION (Statements of Condition) (Details) - USD ($) $ in Thousands	Dec. 31, 2021	Dec. 31, 2020
ASSETS
Cash	$ 14,912	$ 23,739
Investments in low-income housing partnerships	1,254	1,380
Securities and other assets	27,738	23,982
Total Assets	2,786,987	2,555,362
LIABILITIES AND STOCKHOLDERS’ EQUITY
Long-term debt	34,700	53,745
Other liabilities	15,312	16,518
Total Liabilities and Stockholders’ Equity	2,786,987	2,555,362
Corporation
ASSETS
Cash	13,451	6,397
Securities and other assets	2,549	2,203
Receivable from banking subsidiary	1,197	1,251
Total Assets	295,987	273,099
LIABILITIES AND STOCKHOLDERS’ EQUITY
Long-term debt	23,700	15,029
Other liabilities	173	98
Stockholders’ equity	272,114	257,972
Total Liabilities and Stockholders’ Equity	295,987	273,099
Banking Subsidiary | Corporation
ASSETS
Investment	266,983	252,107
Other Subsidiaries | Corporation
ASSETS
Investment	$ 11,807	$ 11,141

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