Income Taxes - Carryforwards (Details) $ in Thousands	12 Months Ended
	Dec. 31, 2016 USD ($)
Operating loss carryforwards
Operating loss carryforwards	$ 138,159
Net operating loss carryforwards, expiration period	14 years
Hong Kong and Australia
Operating loss carryforwards
Operating loss carryforwards	$ 78,343
U.S.
Operating loss carryforwards
Operating loss carryforwards	59,520
Ireland.
Operating loss carryforwards
Operating loss carryforwards	$ 296