Summary of Significant Accounting Policies Summary of Comprehensive Loss (Details) (USD $) In Thousands, unless otherwise specified	3 Months Ended
	Mar. 31, 2014	Mar. 31, 2013
Accounting Policies [Abstract]
Net loss	$ (15,414)	$ (3,551)
Other comprehensive loss	(28)	(4)
Comprehensive loss	$ (15,442)	$ (3,555)