Shareholders' Equity (Issuance of Ordinary Shares) (Details) (USD $)	12 Months Ended			1 Months Ended				2 Months Ended
	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012	Oct. 31, 2013	Feb. 28, 2014	Jun. 30, 2014	Jul. 31, 2014	Jul. 31, 2014
Shareholders Equity [Line Items]
Net proceeds received for the sale of shares	$ 117,429,000	$ 84,453,000
Public offering costs		(7,400,000)
Ordinary Shares
Shareholders Equity [Line Items]
Net proceeds received for the sale of shares	54,000	42,000	145,000
Janssen [Member] | Ordinary Shares
Shareholders Equity [Line Items]
Shares sold pursuant to underwritten public offering				2,619,421
Perrigo [Member] | Ordinary Shares
Shareholders Equity [Line Items]
Shares sold pursuant to underwritten public offering					3,182,253
Share Price					$ 26.00
Underwritten Public Offering [Member] | Ordinary Shares
Shareholders Equity [Line Items]
Shares sold pursuant to underwritten public offering				6,796,500
Underwritten Public Offering [Member]
Shareholders Equity [Line Items]
Ordinary shares sold (in dollars per share)				22.00		$ 22.50
Net proceeds received for the sale of shares						102,500,000
Public offering costs	(5,500,000)
Underwritten Public Offering [Member] | Ordinary Shares
Shareholders Equity [Line Items]
Ordinary shares sold pursuant to underwritten public offering (in shares)						4,750,000
Underwritten Public Offering [Member] | Over-Allotment Option [Member]
Shareholders Equity [Line Items]
Ordinary shares sold pursuant to underwritten public offering (in shares)							712,500
Net proceeds from issuance of ordinary shares in underwritten public offering							14,900,000
Underwriting Discounts							(1,100,000)
Underwritten Public And Over-Allotment Offering [Member]
Shareholders Equity [Line Items]
Net proceeds received for the sale of shares				84,500,000
Underwritten Public And Over-Allotment Offering [Member] | Ordinary Shares
Shareholders Equity [Line Items]
Ordinary shares sold pursuant to underwritten public offering (in shares)				4,177,079				5,462,500
Net proceeds from issuance of ordinary shares in underwritten public offering								$ 117,400,000