Revenues (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2020	Jun. 30, 2019	Jun. 30, 2020	Jun. 30, 2019
Revenues
Total revenues	$ 688,043	$ 529,932	$ 1,256,550	$ 1,027,789
Product revenues, net
Revenues
Total revenues	500,290	433,897	987,017	830,146
JAKAFI
Revenues
Total revenues	473,706	409,506	933,185	785,117
ICLUSIG
Revenues
Total revenues	22,798	24,391	50,046	45,029
PEMAZYRE
Revenues
Total revenues	3,786		3,786
Product royalty revenues
Revenues
Total revenues	92,753	76,035	174,533	137,643
JAKAVI Royalty Revenues
Revenues
Total revenues	66,217	56,895	122,550	102,466
OLUMIANT Royalty Revenues
Revenues
Total revenues	25,830	19,140	51,277	35,177
TABRECTA Royalty Revenues
Revenues
Total revenues	706		706
Milestone and contract revenues
Revenues
Total revenues	$ 95,000	$ 20,000	$ 95,000	$ 60,000