Geographic Information and Business Segments - Revenues by Geographic Area (Details) - USD ($) $ in Thousands		12 Months Ended
	Jan. 02, 2018	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
Revenues from External Customers [Line Items]
Total revenue		$ 1,530,082	$ 1,878,718	$ 1,027,982
BondPoint | Disposal Group, Disposed of by Sale, Not Discontinued Operations
Revenues from External Customers [Line Items]
Gain on sale of BondPoint	$ 337,550		337,600	86,600
United States
Revenues from External Customers [Line Items]
Total revenue		1,146,104	1,644,641	791,044
Ireland
Revenues from External Customers [Line Items]
Total revenue		188,154	81,531	97,637
United Kingdom
Revenues from External Customers [Line Items]
Total revenue		(1,735)	15,681	21,143
Singapore
Revenues from External Customers [Line Items]
Total revenue		109,761	136,161	113,891
Canada
Revenues from External Customers [Line Items]
Total revenue		49,666	0	0
Australia
Revenues from External Customers [Line Items]
Total revenue		34,933	0	0
Others
Revenues from External Customers [Line Items]
Total revenue		$ 3,199	$ 704	$ 4,267