Stockholders' Equity - Preferred Stock (Details) - USD ($) $ / shares in Units, $ in Millions	3 Months Ended
	Mar. 31, 2016	Mar. 31, 2015	Dec. 31, 2015
Stockholders' Equity
Preferred Stock dividend declared	$ 1.0	$ 1.0
Series A Convertible Preferred Stock
Stockholders' Equity
Preferred stock par value	$ 0.001		$ 0.001