Segment Information - Schedule of Each Segment's Profit (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2019	Sep. 30, 2018	Sep. 30, 2019	Sep. 30, 2018	Dec. 31, 2018
Segment Reporting Information [Line Items]
Revenues	$ 303,897	$ 151,467	$ 858,369	$ 453,261
Adjusted EBITDA	56,839		166,659
Acquisition and integration costs	5,259		31,306
Restructuring and related charges	281		4,225	124
Interest expense	23,006	1,013	54,334	7,948
Depreciation and amortization	9,700	1,204	22,366	3,461
Income before income taxes	18,593	34,386	54,428	93,231
Total assets	2,005,504		2,005,504		$ 482,079
Healthcare
Segment Reporting Information [Line Items]
Revenues	159,979	$ 151,467	473,987	$ 453,261
Adjusted EBITDA	39,177		100,986
Total assets	379,926		379,926
Nutrition
Segment Reporting Information [Line Items]
Revenues	143,918		384,382
Adjusted EBITDA	17,662		65,673
Total assets	$ 1,625,578		$ 1,625,578