Commitments and Contingencies (Details) $ in Thousands					1 Months Ended				6 Months Ended	10 Months Ended	12 Months Ended
	Sep. 01, 2017	Dec. 30, 2015 item	Oct. 28, 2015	Feb. 05, 2013 USD ($) ft² item	Oct. 31, 2011 USD ($)	Sep. 30, 2011 item	Apr. 30, 2010 item	Sep. 30, 2004 ft²	Aug. 31, 2017 USD ($) $ / ft²	Jun. 30, 2017 USD ($)	Dec. 31, 2015 USD ($) ft²	Dec. 31, 2014 USD ($)	Dec. 31, 2013 USD ($)	Dec. 31, 2011 USD ($) ft²	May. 01, 2011 USD ($)	Nov. 30, 2005 ft²
Operating leases disclosures
Operating lease, rent expense											$ 16,400	$ 16,300	$ 12,800
2016											9,254
2017											11,023
2018											9,193
Operating lease commitments
2016											9,254
2017											11,023
2018											9,193
2019											7,807
2020											8,035
2021 and beyond											54,278
Total future minimum lease payments											99,590
Legal Contingencies
Amount of security bond required to be posted by company and Sandoz in connection with the litigation					$ 100,000
Maximum amount of security bond for which the entity shall be responsible in the event of loss of case											35,000
Number of patents certifications that generic manufacturer's ANDA must include | item						2
West Kendall Sublease
Operating leases disclosures
Square feet of office and laboratory space leased | ft²								53,323								25,131
Initial lease term								80 months
Extended lease term							48 months
Increase in annual lease payments during the extension term															$ 1,200
Annual rental payments due under the sublease											$ 4,800
Number of additional lease terms exercised | item							1
Area of Real Estate Property | ft²								53,323								25,131
320 Bent Sublease
Operating leases disclosures
Square feet of office and laboratory space leased | ft²				104,678										68,575
Initial lease term														18 months
2016				$ 6,100
2017				6,200
2018				6,300
Tenant improvement allowance				$ 700
Number of times for which extension of lease term is available | item				2
Extended lease term			1 year	1 year
Annual rental payments due under the sublease														$ 2,300
Additional number of times extension of lease term is available | item				2
Additional extended lease term				5 years
Area of Real Estate Property | ft²				104,678										68,575
Operating lease commitments
2016				$ 6,100
2017				6,200
2018				$ 6,300
BMR Amendment Lease Agreement
Operating leases disclosures
Square feet of office and laboratory space leased | ft²											175,000
Number of times for which extension of lease term is available | item		1
Extended lease term		5 years
Maximum percentage of lease or sublease permitted											45.00%
Area of Real Estate Property | ft²											175,000
Subsequent event | BMR Amendment Lease Agreement
Operating leases disclosures
Initial monthly base rent paid (per month)									$ 600
Initial monthly base rent paid (per square foot) | $ / ft²									68.00
Increase in monthly base rent (as a percent)	3.00%
Tenant improvement allowance										$ 4,700