SCHEDULE II: VALUATION AND QUALIFYING ACCOUNTS (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020	May 20, 2020
Movement in valuation and qualifying accounts
Allowance for cash discounts	$ 900	$ 1,300
Increase (decrease) in valuation allowance	(2,100)	13,100
Zyla Life Sciences
Movement in valuation and qualifying accounts
Provisions for liabilities assumed			$ 33,300
Sales & return allowances, discounts, chargebacks and rebates:
Movement in valuation and qualifying accounts
Balance at Beginning of Year	64,442	60,183
Additions / Charged as a Reduction to Revenue	96,332	132,340
Deductions	(107,174)	(128,081)
Balance at End of Year	53,600	64,442
Deferred tax asset valuation allowance:
Movement in valuation and qualifying accounts
Balance at Beginning of Year	103,906	90,820
Additions / Charged as a Reduction to Revenue	0	29,833
Deductions	(2,131)	(16,747)
Balance at End of Year	$ 101,775	$ 103,906