Consolidated Statements of Redeemable Preferred Stock and Equity (Parenthetical) $ in Thousands	12 Months Ended
	Dec. 31, 2014 USD ($) shares
Statement of Stockholders' Equity [Abstract]
Issuance of common stock, issuance costs	$ 942
Conversion of restricted stock units to common stock, treasury shares purchased (in shares) | shares	54,252,000
Convertible notes conversion feature, taxes	$ 5,082
Convertible notes conversion features, issuance costs	886
Purchase of remaining interest in VIE, taxes	$ 300