ALLOWANCE FOR LOAN LOSSES, Impaired Loans and Related Allowance by Segment and Class (Details) - USD ($) $ in Thousands	Jun. 30, 2017	Dec. 31, 2016
Financing Receivable, Impaired [Line Items]
Unpaid principal balance	$ 2,409	$ 5,935
Recorded investment, with a recorded allowance	937	3,709
Recorded investment, with no recorded allowance	1,349	1,810
Recorded investment, total	2,286	5,519
Related recorded allowance	98	119
Commercial [Member]
Financing Receivable, Impaired [Line Items]
Unpaid principal balance	432	3,591
Recorded investment, with a recorded allowance	148	3,043
Recorded investment, with no recorded allowance	196	63
Recorded investment, total	344	3,106
Related recorded allowance	4	14
Commercial [Member] \| Commercial Mortgage [Member]
Financing Receivable, Impaired [Line Items]
Unpaid principal balance	142	2,894
Recorded investment, with a recorded allowance	0	2,894
Recorded investment, with no recorded allowance	143	0
Recorded investment, total	143	2,894
Related recorded allowance	0	8
Commercial [Member] \| Commercial and Industrial [Member]
Financing Receivable, Impaired [Line Items]
Unpaid principal balance	290	697
Recorded investment, with a recorded allowance	148	149
Recorded investment, with no recorded allowance	53	63
Recorded investment, total	201	212
Related recorded allowance	4	6
Non-Commercial [Member]
Financing Receivable, Impaired [Line Items]
Unpaid principal balance	1,977	2,344
Recorded investment, with a recorded allowance	789	666
Recorded investment, with no recorded allowance	1,153	1,747
Recorded investment, total	1,942	2,413
Related recorded allowance	94	105
Non-Commercial [Member] \| Residential Mortgage [Member]
Financing Receivable, Impaired [Line Items]
Unpaid principal balance	1,623	2,089
Recorded investment, with a recorded allowance	708	583
Recorded investment, with no recorded allowance	896	1,589
Recorded investment, total	1,604	2,172
Related recorded allowance	13	22
Non-Commercial [Member] \| Revolving Mortgage [Member]
Financing Receivable, Impaired [Line Items]
Unpaid principal balance	354	255
Recorded investment, with a recorded allowance	81	83
Recorded investment, with no recorded allowance	257	158
Recorded investment, total	338	241
Related recorded allowance	$ 81	$ 83

ASB Bancorp Inc 10-Q