Revision of Prior Years' Financial Statements (Effects of the Error Correction on the Consolidated Statements of Cash Flows) (Details) - USD ($) $ in Thousands	9 Months Ended
	Sep. 30, 2015	Sep. 30, 2014
Quantifying Misstatement in Current Year Financial Statements [Line Items]
Net cash used in operating activities	$ (20,532)	$ (22,870)
Net cash used in investing activities	$ 0	0
As Previously Reported [Member]
Quantifying Misstatement in Current Year Financial Statements [Line Items]
Net cash used in operating activities		(22,042)
Net cash used in investing activities		(828)
Correction [Member]
Quantifying Misstatement in Current Year Financial Statements [Line Items]
Net cash used in operating activities		(828)
Net cash used in investing activities		$ 828