Income Taxes - Domestic and Foreign Income (loss) before income taxes (Details) (USD $) In Thousands, unless otherwise specified	12 Months Ended
	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011
Domestic and Foreign Income (Loss) before Income Taxes and income (loss) in equity method investments. [Line Items]
(Loss) income before income taxes and equity in earnings of joint venture	$ (60,744)	$ (15,542)	$ (14,613)
U.S.
Domestic and Foreign Income (Loss) before Income Taxes and income (loss) in equity method investments. [Line Items]
(Loss) income before income taxes and equity in earnings of joint venture	(55,611)	(28,398)	(26,321)
Non-U.S.
Domestic and Foreign Income (Loss) before Income Taxes and income (loss) in equity method investments. [Line Items]
(Loss) income before income taxes and equity in earnings of joint venture	$ (5,133)	$ 12,856	$ 11,708