Loans, Summary of Loans (Details) - USD ($) $ in Thousands	Jun. 30, 2019	Dec. 31, 2018
Summary of loans [Abstract]
Total loans	$ 485,435	$ 393,282	[1]
Commercial Real Estate [Member]
Summary of loans [Abstract]
Total loans	305,472	249,827
Commercial Real Estate [Member] | Residential ADC [Member]
Summary of loans [Abstract]
Total loans	8,095	4,650
Commercial Real Estate [Member] | Commercial ADC [Member]
Summary of loans [Abstract]
Total loans	31,644	20,790
Commercial Real Estate [Member] | Farmland [Member]
Summary of loans [Abstract]
Total loans	6,365	4,833
Commercial Real Estate [Member] | Multifamily [Member]
Summary of loans [Abstract]
Total loans	19,491	18,537
Commercial Real Estate [Member] | Owner Occupied [Member]
Summary of loans [Abstract]
Total loans	129,259	103,983
Commercial Real Estate [Member] | Non-owner Occupied [Member]
Summary of loans [Abstract]
Total loans	110,618	97,034
Commercial [Member]
Summary of loans [Abstract]
Total loans	64,541	51,334
Commercial [Member] | Commercial and Industrial [Member]
Summary of loans [Abstract]
Total loans	57,423	49,499
Commercial [Member] | Agricultural [Member]
Summary of loans [Abstract]
Total loans	200	262
Commercial [Member] | Other [Member]
Summary of loans [Abstract]
Total loans	6,918	1,573
Residential Mortgage [Member]
Summary of loans [Abstract]
Total loans	70,200	54,207
Residential Mortgage [Member] | First Lien, Closed-End [Member]
Summary of loans [Abstract]
Total loans	69,088	53,395
Residential Mortgage [Member] | Junior Lien, Closed-End [Member]
Summary of loans [Abstract]
Total loans	1,112	812
Home Equity Lines [Member]
Summary of loans [Abstract]
Total loans	39,244	33,968
Consumer - Other [Member]
Summary of loans [Abstract]
Total loans	5,978	3,946
Loans Excluding PCI [Member]
Summary of loans [Abstract]
Total loans	482,180	393,282
Loans Excluding PCI [Member] | Commercial Real Estate [Member]
Summary of loans [Abstract]
Total loans	303,874	249,827
Loans Excluding PCI [Member] | Commercial Real Estate [Member] | Residential ADC [Member]
Summary of loans [Abstract]
Total loans	8,095	4,650
Loans Excluding PCI [Member] | Commercial Real Estate [Member] | Commercial ADC [Member]
Summary of loans [Abstract]
Total loans	31,633	20,790
Loans Excluding PCI [Member] | Commercial Real Estate [Member] | Farmland [Member]
Summary of loans [Abstract]
Total loans	6,365	4,833
Loans Excluding PCI [Member] | Commercial Real Estate [Member] | Multifamily [Member]
Summary of loans [Abstract]
Total loans	19,491	18,537
Loans Excluding PCI [Member] | Commercial Real Estate [Member] | Owner Occupied [Member]
Summary of loans [Abstract]
Total loans	127,672	103,983
Loans Excluding PCI [Member] | Commercial Real Estate [Member] | Non-owner Occupied [Member]
Summary of loans [Abstract]
Total loans	110,618	97,034
Loans Excluding PCI [Member] | Commercial [Member]
Summary of loans [Abstract]
Total loans	64,226	51,334
Loans Excluding PCI [Member] | Commercial [Member] | Commercial and Industrial [Member]
Summary of loans [Abstract]
Total loans	57,108	49,499
Loans Excluding PCI [Member] | Commercial [Member] | Agricultural [Member]
Summary of loans [Abstract]
Total loans	200	262
Loans Excluding PCI [Member] | Commercial [Member] | Other [Member]
Summary of loans [Abstract]
Total loans	6,918	1,573
Loans Excluding PCI [Member] | Residential Mortgage [Member]
Summary of loans [Abstract]
Total loans	68,939	54,207
Loans Excluding PCI [Member] | Residential Mortgage [Member] | First Lien, Closed-End [Member]
Summary of loans [Abstract]
Total loans	67,829	53,395
Loans Excluding PCI [Member] | Residential Mortgage [Member] | Junior Lien, Closed-End [Member]
Summary of loans [Abstract]
Total loans	1,110	812
Loans Excluding PCI [Member] | Home Equity Lines [Member]
Summary of loans [Abstract]
Total loans	39,244	33,968
Loans Excluding PCI [Member] | Consumer - Other [Member]
Summary of loans [Abstract]
Total loans	5,897	3,946
PCI Loans [Member]
Summary of loans [Abstract]
Total loans	3,255	0
PCI Loans [Member] | Commercial Real Estate [Member]
Summary of loans [Abstract]
Total loans	1,598	0
PCI Loans [Member] | Commercial Real Estate [Member] | Residential ADC [Member]
Summary of loans [Abstract]
Total loans	0	0
PCI Loans [Member] | Commercial Real Estate [Member] | Commercial ADC [Member]
Summary of loans [Abstract]
Total loans	11	0
PCI Loans [Member] | Commercial Real Estate [Member] | Farmland [Member]
Summary of loans [Abstract]
Total loans	0	0
PCI Loans [Member] | Commercial Real Estate [Member] | Multifamily [Member]
Summary of loans [Abstract]
Total loans	0	0
PCI Loans [Member] | Commercial Real Estate [Member] | Owner Occupied [Member]
Summary of loans [Abstract]
Total loans	1,587	0
PCI Loans [Member] | Commercial Real Estate [Member] | Non-owner Occupied [Member]
Summary of loans [Abstract]
Total loans	0	0
PCI Loans [Member] | Commercial [Member]
Summary of loans [Abstract]
Total loans	315	0
PCI Loans [Member] | Commercial [Member] | Commercial and Industrial [Member]
Summary of loans [Abstract]
Total loans	315	0
PCI Loans [Member] | Commercial [Member] | Agricultural [Member]
Summary of loans [Abstract]
Total loans	0	0
PCI Loans [Member] | Commercial [Member] | Other [Member]
Summary of loans [Abstract]
Total loans	0	0
PCI Loans [Member] | Residential Mortgage [Member]
Summary of loans [Abstract]
Total loans	1,261	0
PCI Loans [Member] | Residential Mortgage [Member] | First Lien, Closed-End [Member]
Summary of loans [Abstract]
Total loans	1,259	0
PCI Loans [Member] | Residential Mortgage [Member] | Junior Lien, Closed-End [Member]
Summary of loans [Abstract]
Total loans	2	0
PCI Loans [Member] | Home Equity Lines [Member]
Summary of loans [Abstract]
Total loans	0	0
PCI Loans [Member] | Consumer - Other [Member]
Summary of loans [Abstract]
Total loans	$ 81	$ 0

[1] Derived from Carolina Trust BancShares, Inc.'s audited financial statements included in its 2018 Annual Report on Form 10-K.