Discontinued Operations - Summary of Financial Results Included in Loss from Discontinued Operations (Parenthetical) (Details) - Nutrisystem, Inc. - USD ($) $ in Thousands			3 Months Ended
		Dec. 09, 2020	Mar. 31, 2021	Mar. 31, 2020
Income Statement Balance Sheet And Additional Disclosures By Disposal Groups Including Discontinued Operations [Line Items]
Interest expense	[1]			$ 10,394
Long-term Debt
Income Statement Balance Sheet And Additional Disclosures By Disposal Groups Including Discontinued Operations [Line Items]
Interest expense			$ 519,000
Long-term Debt | Credit Agreement
Income Statement Balance Sheet And Additional Disclosures By Disposal Groups Including Discontinued Operations [Line Items]
Repayment of principal on the term loan		$ 519,000

[1] 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 our credit agreement. In conjunction with the partial debt prepayment, we wrote off a portion of the related deferred loan costs and original issue discount. For the three months ended March 31, 2020, we allocated interest expense to discontinued operations based on the interest expense incurred during the period related to $519.0 million of term loan debt, using our historical interest rates.