Revenue Recognition (Tables)

3 Months Ended

Mar. 31, 2018

Revenue from Contract with Customer [Abstract]

Summary in changes in contract liabilities

The following table summarizes changes in the Company’s contract liabilities for the three months endedMarch 31, 2018:

	Balance at January 1, 2018 (ASC 606 adoption)		Additions		Deductions		Balance at March 31, 2018
	(in thousands)
Three Months Ended March 31, 2018
Contract liabilities:
Other liabilities, current portion	$	1,654	$	12,983	$	—	$	14,637

Schedule of disaggregation of revenue

Product revenues, net consisted of the following:

	Three Months Ended March 31,
	2018 (as reported under ASC 606)		2017 (as reported under ASC 605)
	(in thousands)
KALYDECO	$	249,539	$	185,715
ORKAMBI	354,066		294,861
SYMDEKO	34,124		—
Other	—		46
Total product revenues, net	$	637,729	$	480,622

Total revenues from external customers and collaborators by geographic region consisted of the following:

	Three Months Ended March 31,
	2018 (as reported under ASC 606)		2017 (as reported under ASC 605)
	(in thousands)
United States	$	482,667	$	599,126
Outside of the United States
Europe	131,895		92,358
Other	26,237		23,234
Total revenues outside of the United States	158,132		115,592
Total revenues	$	640,799	$	714,718