Loans (Details 5) - USD ($) $ in Thousands	Mar. 31, 2017	Dec. 31, 2016
Financing Receivable, Recorded Investment [Line Items]
Loans	$ 311,609	$ 308,492	[1]
Pass [Member]
Financing Receivable, Recorded Investment [Line Items]
Loans	300,118	294,643
Special Mention [Member]
Financing Receivable, Recorded Investment [Line Items]
Loans	5,584	7,670
Substandard [Member]
Financing Receivable, Recorded Investment [Line Items]
Loans	5,907	6,179
Commercial Real Estate [Member]
Financing Receivable, Recorded Investment [Line Items]
Loans	183,850	180,617
Commercial Real Estate [Member] | Pass [Member]
Financing Receivable, Recorded Investment [Line Items]
Loans	178,561	173,236
Commercial Real Estate [Member] | Special Mention [Member]
Financing Receivable, Recorded Investment [Line Items]
Loans	2,272	4,308
Commercial Real Estate [Member] | Substandard [Member]
Financing Receivable, Recorded Investment [Line Items]
Loans	3,017	3,073
Commercial Real Estate [Member] | Residential ADC [Member]
Financing Receivable, Recorded Investment [Line Items]
Loans	3,438	2,463
Commercial Real Estate [Member] | Residential ADC [Member] | Pass [Member]
Financing Receivable, Recorded Investment [Line Items]
Loans	3,438	2,463
Commercial Real Estate [Member] | Commercial ADC [Member]
Financing Receivable, Recorded Investment [Line Items]
Loans	23,330	24,583
Commercial Real Estate [Member] | Commercial ADC [Member] | Pass [Member]
Financing Receivable, Recorded Investment [Line Items]
Loans	21,827	21,832
Commercial Real Estate [Member] | Commercial ADC [Member] | Special Mention [Member]
Financing Receivable, Recorded Investment [Line Items]
Loans	493	1,729
Commercial Real Estate [Member] | Commercial ADC [Member] | Substandard [Member]
Financing Receivable, Recorded Investment [Line Items]
Loans	1,010	1,022
Commercial Real Estate [Member] | Farmland [Member]
Financing Receivable, Recorded Investment [Line Items]
Loans	4,680	3,826
Commercial Real Estate [Member] | Farmland [Member] | Pass [Member]
Financing Receivable, Recorded Investment [Line Items]
Loans	4,639	3,783
Commercial Real Estate [Member] | Farmland [Member] | Substandard [Member]
Financing Receivable, Recorded Investment [Line Items]
Loans	41	43
Commercial Real Estate [Member] | Mulitfamily [Member]
Financing Receivable, Recorded Investment [Line Items]
Loans	12,202	11,980
Commercial Real Estate [Member] | Mulitfamily [Member] | Pass [Member]
Financing Receivable, Recorded Investment [Line Items]
Loans	12,053	11,827
Commercial Real Estate [Member] | Mulitfamily [Member] | Substandard [Member]
Financing Receivable, Recorded Investment [Line Items]
Loans	149	153
Commercial Real Estate [Member] | Owner Occupied [Member]
Financing Receivable, Recorded Investment [Line Items]
Loans	71,644	69,686
Commercial Real Estate [Member] | Owner Occupied [Member] | Pass [Member]
Financing Receivable, Recorded Investment [Line Items]
Loans	69,227	66,820
Commercial Real Estate [Member] | Owner Occupied [Member] | Special Mention [Member]
Financing Receivable, Recorded Investment [Line Items]
Loans	886	1,303
Commercial Real Estate [Member] | Owner Occupied [Member] | Substandard [Member]
Financing Receivable, Recorded Investment [Line Items]
Loans	1,531	1,563
Commercial Real Estate [Member] | Non-owner Occupied [Member]
Financing Receivable, Recorded Investment [Line Items]
Loans	68,556	68,079
Commercial Real Estate [Member] | Non-owner Occupied [Member] | Pass [Member]
Financing Receivable, Recorded Investment [Line Items]
Loans	67,377	66,511
Commercial Real Estate [Member] | Non-owner Occupied [Member] | Special Mention [Member]
Financing Receivable, Recorded Investment [Line Items]
Loans	893	1,276
Commercial Real Estate [Member] | Non-owner Occupied [Member] | Substandard [Member]
Financing Receivable, Recorded Investment [Line Items]
Loans	286	292
Commercial [Member]
Financing Receivable, Recorded Investment [Line Items]
Loans	44,074	43,780
Commercial [Member] | Commercial and Industrial [Member]
Financing Receivable, Recorded Investment [Line Items]
Loans	42,359	41,935
Commercial [Member] | Agricultural [Member]
Financing Receivable, Recorded Investment [Line Items]
Loans	374	209
Commercial [Member] | Other [Member]
Financing Receivable, Recorded Investment [Line Items]
Loans	1,341	1,636
Commercial [Member] | Pass [Member]
Financing Receivable, Recorded Investment [Line Items]
Loans	42,185	41,763
Commercial [Member] | Pass [Member] | Commercial and Industrial [Member]
Financing Receivable, Recorded Investment [Line Items]
Loans	40,470	39,918
Commercial [Member] | Pass [Member] | Agricultural [Member]
Financing Receivable, Recorded Investment [Line Items]
Loans	374	209
Commercial [Member] | Pass [Member] | Other [Member]
Financing Receivable, Recorded Investment [Line Items]
Loans	1,341	1,636
Commercial [Member] | Special Mention [Member]
Financing Receivable, Recorded Investment [Line Items]
Loans	471	442
Commercial [Member] | Special Mention [Member] | Commercial and Industrial [Member]
Financing Receivable, Recorded Investment [Line Items]
Loans	471	442
Commercial [Member] | Substandard [Member]
Financing Receivable, Recorded Investment [Line Items]
Loans	1,418	1,575
Commercial [Member] | Substandard [Member] | Commercial and Industrial [Member]
Financing Receivable, Recorded Investment [Line Items]
Loans	1,418	1,575
Residential Mortgage [Member]
Financing Receivable, Recorded Investment [Line Items]
Loans	44,988	44,698
Residential Mortgage [Member] | Pass [Member]
Financing Receivable, Recorded Investment [Line Items]
Loans	42,487	42,259
Residential Mortgage [Member] | Special Mention [Member]
Financing Receivable, Recorded Investment [Line Items]
Loans	1,130	1,174
Residential Mortgage [Member] | Substandard [Member]
Financing Receivable, Recorded Investment [Line Items]
Loans	1,371	1,265
Residential Mortgage [Member] | First Lien Closed-End [Member]
Financing Receivable, Recorded Investment [Line Items]
Loans	44,133	43,811
Residential Mortgage [Member] | First Lien Closed-End [Member] | Pass [Member]
Financing Receivable, Recorded Investment [Line Items]
Loans	42,088	41,822
Residential Mortgage [Member] | First Lien Closed-End [Member] | Special Mention [Member]
Financing Receivable, Recorded Investment [Line Items]
Loans	1,130	1,174
Residential Mortgage [Member] | First Lien Closed-End [Member] | Substandard [Member]
Financing Receivable, Recorded Investment [Line Items]
Loans	915	815
Residential Mortgage [Member] | Junior Lien Closed-End [Member]
Financing Receivable, Recorded Investment [Line Items]
Loans	855	887
Residential Mortgage [Member] | Junior Lien Closed-End [Member] | Pass [Member]
Financing Receivable, Recorded Investment [Line Items]
Loans	399	437
Residential Mortgage [Member] | Junior Lien Closed-End [Member] | Substandard [Member]
Financing Receivable, Recorded Investment [Line Items]
Loans	456	450
Home Equity Lines [Member]
Financing Receivable, Recorded Investment [Line Items]
Loans	34,199	35,119
Home Equity Lines [Member] | Pass [Member]
Financing Receivable, Recorded Investment [Line Items]
Loans	32,552	33,274
Home Equity Lines [Member] | Special Mention [Member]
Financing Receivable, Recorded Investment [Line Items]
Loans	1,546	1,579
Home Equity Lines [Member] | Substandard [Member]
Financing Receivable, Recorded Investment [Line Items]
Loans	101	266
Consumer - Other [Member]
Financing Receivable, Recorded Investment [Line Items]
Loans	4,498	4,278
Consumer - Other [Member] | Pass [Member]
Financing Receivable, Recorded Investment [Line Items]
Loans	4,333	4,111
Consumer - Other [Member] | Special Mention [Member]
Financing Receivable, Recorded Investment [Line Items]
Loans	$ 165	$ 167

[1] Derived from Carolina Trust Bancshares Inc's audited financial statements included in its 2016 Annual Report on Form 10-K