Business Combinations - Additional Information (Details) $ / shares in Units, $ in Thousands			3 Months Ended		12 Months Ended
	Mar. 08, 2019 USD ($) $ / shares	Dec. 09, 2018	Dec. 31, 2019 USD ($)	Jun. 30, 2019 USD ($)	Dec. 31, 2019 USD ($)		Dec. 31, 2018 USD ($)
Business Acquisition [Line Items]
Impairment loss of goodwill			$ 137,100		$ 137,100	[1]	$ 0	[1]
Increase (decrease) in acquisition, integration, and restructuring costs					(33,400)		33,400
Increase (decrease) in income tax expense					$ (2,700)		2,700
Increase in cost of revenue							$ 2,800
Tradename - Nutrisystem
Business Acquisition [Line Items]
Impairment loss of intangibles			240,000
Nutrisystem, Inc.
Business Acquisition [Line Items]
Business acquisition, cash received in conversion | $ / shares	$ 38.75
Business acquisition, common stock exchange ratio	0.2141
Merger consideration	$ 1,286,108
Decreased estimated fair value of intangible assets due to change in timing of projected revenue				$ (15,000)
Increase to goodwill				11,400
Decrease in deferred liabilities				$ 3,600
Impairment loss of goodwill			$ 137,100
Nutrisystem, Inc. | Merger Agreement
Business Acquisition [Line Items]
Business acquisition, agreement date		Dec. 09, 2018
Business acquisition, effective date of acquisition	Mar. 08, 2019
Business acquisition, cash received in conversion | $ / shares	$ 38.75
Business acquisition, common stock exchange ratio	0.2141

[1] See Note 13 for explanation.