Document and Entity Information - USD ($)
$ in Millions

12 Months Ended

Dec. 31, 2020

Feb. 19, 2021

Jun. 30, 2020

Cover [Abstract]

Entity Registrant Name

TIVITY HEALTH, INC.

Entity Central Index Key

0000704415

Current Fiscal Year End Date

--12-31

Trading Symbol

TVTY

Title of 12(b) Security

Common Stock - $.001 par value

Security Exchange Name

NASDAQ

Entity Well-known Seasoned Issuer

Yes

Entity Voluntary Filers

No

Entity Current Reporting Status

Yes

Entity Interactive Data Current

Yes

Entity Filer Category

Accelerated Filer

Entity Public Float

$ 487.1

Entity Common Stock, Shares Outstanding

49,151,491

Document Fiscal Year Focus

2020

Document Fiscal Period Focus

FY

Document Type

10-K

Amendment Flag

false

Document Period End Date

Dec. 31, 2020

Entity Shell Company

false

Entity Small Business

false

Entity Emerging Growth Company

false

Document Annual Report

true

Document Transition Report

false

Entity File Number

000-19364

Entity Incorporation, State or Country Code

DE

Entity Tax Identification Number

62-1117144

Entity Address, Address Line One

701 Cool Springs Boulevard

Entity Address, City or Town

Franklin

Entity Address, State or Province

TN

Entity Address, Postal Zip Code

37067

City Area Code

800

Local Phone Number

869-5311

ICFR Auditor Attestation Flag

true

Documents Incorporated by Reference

Portions of the registrant's Proxy Statement for the 2021 Annual Meeting of Stockholders are incorporated by reference into Part III of this Form 10-K.