CONSOLIDATED STATEMENTS OF OPERATIONS (Unaudited) - USD ($) shares in Thousands, $ in Thousands		3 Months Ended
		Mar. 31, 2017	Mar. 31, 2016
CONSOLIDATED STATEMENTS OF OPERATIONS (Unaudited) [Abstract]
Revenues		$ 140,970	$ 126,012
Cost of services (exclusive of depreciation and amortization of $657 and $1,530, respectively, included below)		102,399	91,377
Selling, general & administrative expenses		8,361	9,411
Depreciation and amortization		787	1,872
Restructuring and related charges		737	39
Operating income		28,686	23,313
Interest expense		3,834	4,105
Income before income taxes		24,852	19,208
Income tax expense		9,371	0
Net income from continuing operations		15,481	19,208
Loss from discontinued operations, net of income tax benefit		(220)	(33,105)
Net income (loss)		15,261	(13,897)
Less: net income (loss) attributable to non-controlling interest		0	312
Net income (loss) attributable to Tivity Health, Inc.		$ 15,261	$ (14,209)
Earnings (loss) per share attributable to Tivity Health, Inc. - basic:
Continuing operations (in dollars per share)		$ 0.40	$ 0.53
Discontinued operations (in dollars per share)		(0.01)	(0.93)
Net income (loss) (in dollars per share)	[1]	0.39	(0.39)
Earnings (loss) per share attributable to Tivity Health, Inc. - diluted:
Continuing operations (in dollars per share)		0.38	0.52
Discontinued operations (in dollars per share)		(0.01)	(0.91)
Net income (loss) (in dollars per share)	[1]	$ 0.38	$ (0.39)
Comprehensive income (loss)		$ 15,372	$ (12,851)
Weighted average common shares and equivalents:
Basic (in shares)		39,069	36,109
Diluted (in shares)		40,541	36,861

[1] Figures may not add due to rounding.