Revenue Recognition (Tables)

9 Months Ended

Sep. 30, 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 nine months endedSeptember 30, 2018:

	Balance at January 1, 2018 (ASC 606 adoption)		Additions		Deductions			Balance at September 30, 2018
	(in thousands)
Three Months Ended September 30, 2018
Contract liabilities:
Other liabilities, current portion	$	1,654	$	54,724	$	(16,608	)	$	39,770

Schedule of disaggregation of revenue

Product revenues, net consisted of the following:

	Three Months Ended September 30,					Nine Months Ended September 30,
	2018 (as reported under ASC 606)		2017 (as reported under ASC 605)			2018 (as reported under ASC 606)		2017 (as reported under ASC 605)
	(in thousands)
KALYDECO	$	245,733	$	213,461		$	748,365	$	588,809
ORKAMBI	281,859		336,183			947,186		955,451
SYMDEKO	254,919		—			474,601		—
Other	—		(2		)	—		(8		)
Total product revenues, net	$	782,511	$	549,642		$	2,170,152	$	1,544,252

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

	Three Months Ended September 30,				Nine Months Ended September 30,
	2018 (as reported under ASC 606)		2017 (as reported under ASC 605)		2018 (as reported under ASC 606)		2017 (as reported under ASC 605)
	(in thousands)
United States	$	620,485	$	454,736	$	1,687,963	$	1,483,666
Outside of the United States
Europe	132,876		94,057		400,685		278,407
Other	31,174		29,372		88,843		74,945
Total revenues outside of the United States	164,050		123,429		489,528		353,352
Total revenues	$	784,535	$	578,165	$	2,177,491	$	1,837,018