Document And Entity Information - USD ($)	12 Months Ended
	Dec. 31, 2022	Mar. 03, 2023	Jun. 30, 2022
Document Information [Line Items]
Entity Central Index Key	0001518621
Entity Registrant Name	Orchid Island Capital, Inc.
Amendment Flag	false
Current Fiscal Year End Date	--12-31
Document Fiscal Period Focus	FY
Document Fiscal Year Focus	2022
Document Type	10-K
Document Annual Report	true
Document Period End Date	Dec. 31, 2022
Document Transition Report	false
Entity File Number	001-35236
Entity Incorporation, State or Country Code	MD
Entity Tax Identification Number	27-3269228
Entity Address, Address Line One	3305 Flamingo Drive
Entity Address, City or Town	Vero Beach
Entity Address, State or Province	FL
Entity Address, Postal Zip Code	32963
City Area Code	772
Local Phone Number	231-1400
Title of 12(b) Security	Common Stock, $0.01 par value
Trading Symbol	ORC
Security Exchange Name	NYSE
Entity Well-known Seasoned Issuer	No
Entity Voluntary Filers	No
Entity Current Reporting Status	Yes
Entity Interactive Data Current	Yes
Entity Filer Category	Accelerated Filer
Entity Small Business	false
Entity Emerging Growth Company	false
ICFR Auditor Attestation Flag	true
Entity Shell Company	false
Entity Public Float			$ 493,960,589
Entity Common Stock, Shares Outstanding		39,081,942
Auditor Firm ID	243
Auditor Name	BDO USA, LLP
Auditor Location	West Palm Beach, Florida