Income Taxes - Additional Information (Details) - USD ($)	12 Months Ended
	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013
Income Tax Disclosure [Abstract]
Operating loss carryforwards	$ 192,100,000
Income tax expense	0	$ 0	$ 0
Non current deferred tax benefits	$ 66,700,000	$ 60,900,000