Discontinued Operations - Summary of Financial Results Included in Income (Loss) from Discontinued Operations (Details) - USD ($) $ in Thousands		3 Months Ended	12 Months Ended
		Mar. 31, 2020	Dec. 31, 2020		Dec. 31, 2019		Dec. 31, 2018
Income Statement Balance Sheet And Additional Disclosures By Disposal Groups Including Discontinued Operations [Line Items]
Impairment loss			$ 199,500		$ 377,100
Write-off of deferred loan costs and debt discount	[1]		(8,946)
Discontinued operation, income tax (benefit)			(46,851)		(59,881)		$ 325
Loss from discontinued operations, net of income tax benefit			(280,500)		(332,038)		$ 901
Nutrisystem, Inc.
Income Statement Balance Sheet And Additional Disclosures By Disposal Groups Including Discontinued Operations [Line Items]
Revenues			617,191	[2]	498,091	[3]
Cost of revenues			291,097	[2]	232,240	[3]
Marketing expenses			196,952	[2]	140,286	[3]
Selling, general and administrative expenses			59,093	[2]	56,840	[3]
Depreciation and amortization			35,957	[2]	43,638	[3]
Impairment loss		$ 199,500	199,500	[2]	377,100	[3]
Restructuring and related charges			472	[2]	5,143	[3]
Interest expense	[4]		36,798	[2]	34,763	[3]
Pretax loss from discontinued operations			(202,678)	[2]	(391,919)	[3]
Loss on de-designation of cash flow hedges	[2],[5]		(14,336)
Write-off of deferred loan costs and debt discount	[2],[4]		(8,946)
Loss on sale of Nutrition business	[2],[6]		(101,391)
Total pretax loss on discontinued operations			(327,351)	[2]	(391,919)	[3]
Discontinued operation, income tax (benefit)			(46,851)	[2]	(59,881)	[3]
Loss from discontinued operations, net of income tax benefit			$ (280,500)	[2]	$ (332,038)	[3]

[1] Reflected on the consolidated statement of cash flows in the line items “Amortization and write-off of deferred loan costs” and “Amortization and write-off of debt discount”.

[2] Results include the period from January 1, 2020 through December 8, 2020.

[3] Results include the period from March 8, 2019 (the date of acquisition) through December 31, 2019.

[4] The term loans under our Credit Agreement were originated with the purchase of Nutrisystem on March 8, 2019. Following the disposition of Nutrisystem, we repaid $519.0 million of principal on the Term Loans under the terms of the Credit Agreement. In conjunction with the partial debt prepayment, we wrote off a portion of the related deferred loan costs and original issue discount. We allocated interest expense to discontinued operations based on the interest expense incurred from March 8, 2019 through December 8, 2020 related to $519.0 million of term loan debt, using our historical interest rates.

[5] Represents loss recognized in the fourth quarter of 2020 in connection with the de-designation of cash flow hedging on interest rate swaps (see Note 13).

[6] Consists of impairment losses of $90.2 million related to Nutrisystem goodwill (see Note 12), which includes post-Closing adjustments related to final settlement, and $11.2 million of transaction costs directly related to the disposition of Nutrisystem.