Cowen (COWN) 10-K/A30 Apr 212020 FY Annual report (amended)Financial data

Company Profile

Cover - USD ($)	12 Months Ended
Cover - USD ($)	Dec. 31, 2020	Apr. 29, 2021	Jun. 30, 2020
Entity Information [Line Items]
Document Type	10-K/A
Amendment Flag	false
Document Annual Report	true
Document Transition Report	false
Document Period End Date	Dec. 31, 2020
Document Fiscal Period Focus	FY
Document Fiscal Year Focus	2020
Current Fiscal Year End Date	--12-31
Entity File Number	001-34516
Entity Registrant Name	Cowen Inc.
Entity Central Index Key	0001466538
Entity Tax Identification Number	27-0423711
Entity Incorporation, State or Country Code	DE
Entity Address, Address Line One	599 Lexington Avenue
Entity Address, City or Town	New York
Entity Address, State or Province	NY
Entity Address, Postal Zip Code	10022
City Area Code	212
Local Phone Number	845-7900
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
Entity Shell Company	false
Entity Public Float			$ 429,938,446
Entity Common Stock, Shares Outstanding		26,866,951
ICFR Auditor Attestation Flag	false
Common Class A [Member]
Entity Information [Line Items]
Title of 12(b) Security	Class A Common Stock, par value $0.01 per share
Trading Symbol	COWN
Security Exchange Name	NASDAQ
7.75% Senior Notes due 2033 [Member]
Entity Information [Line Items]
Title of 12(b) Security	7.75% Senior Notes due 2033
Trading Symbol	COWNL
Security Exchange Name	NASDAQ