Income Taxes - Additional Information (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2016	Dec. 31, 2015	Dec. 31, 2014	Feb. 26, 2009
Income Tax Contingency [Line Items]
Statutory federal income tax rate	35.00%	35.00%	35.00%
Increase in valuation allowance	$ 95,000	$ 55,000
Valuation allowance	162,892	67,890
Federal net operating loss carryforwards	614,751
Unrecognized tax benefits, if recognized, would impact effective tax rate	1,900	$ 1,900	$ 8,000
Foreign [Member]
Income Tax Contingency [Line Items]
Federal net operating loss carryforwards	51,100
Alternative Minimum Tax Credits [Member]
Income Tax Contingency [Line Items]
Tax credit carryforwards	$ 4,900
Targanta [Member]
Income Tax Contingency [Line Items]
Percentage of voting interests acquired				100.00%