Revenue Recognition (Tables)

6 Months Ended

Jun. 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 six months endedJune 30, 2018:

	Balance at January 1, 2018 (ASC 606 adoption)		Additions		Deductions			Balance at June 30, 2018
	(in thousands)
Three Months Ended June 30, 2018
Contract liabilities:
Other liabilities, current portion	$	1,654	$	34,513	$	(3,736	)	$	32,431

Schedule of disaggregation of revenue

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

	Three Months Ended June 30,				Six Months Ended June 30, 2018
	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	$	584,811	$	429,804	$	1,067,478	$	1,028,930
Outside of the United States
Europe	135,914		91,992		267,809		184,350
Other	31,432		22,339		57,669		45,573
Total revenues outside of the United States	167,346		114,331		325,478		229,923
Total revenues	$	752,157	$	544,135	$	1,392,956	$	1,258,853

Product revenues, net consisted of the following:

	Three Months Ended June 30,					Six Months Ended June 30, 2018
	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	$	253,093	$	189,633		$	502,632	$	375,348
ORKAMBI	311,261		324,407			665,327		619,268
SYMDEKO	185,558		—			219,682		—
Other	—		(52		)	—		(6		)
Total product revenues, net	$	749,912	$	513,988		$	1,387,641	$	994,610