Shareholders' Deficit (Details) - USD ($) $ / shares in Units, $ in Millions		12 Months Ended
	Jan. 31, 2014	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013	Jul. 22, 2011
Earnings Per Share, Basic, by Common Class, Including Two Class Method [Line Items]
Equity issuance proceeds	$ 250.0	$ 0.0	$ 250.0	$ 0.0
Common stock, shares authorized		95,000,000	95,000,000
Previous maximum ownership percentage		19.99%	19.99%
Amortization of Beneficial Conversion Feature on Preferred Stock		$ 0.0	$ 18.1	$ 0.0
Preferred stock authorized shares		5,000,000	5,000,000
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Beginning balance, preferred shares		0	0	0
Beginning balance, common shares		30,667,000	10,173,000	7,976,000
Ending balance, preferred shares		0	0	0
Ending balance, common shares		32,141,000	30,667,000	10,173,000
Common Stock [Member]
Earnings Per Share, Basic, by Common Class, Including Two Class Method [Line Items]
Common stock shares converted from preferred		0	(2,333,000)	0
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Issuance of stock	14,333,334	0	14,333,000	0
Common stock shares converted from preferred		0	2,333,000	0
Stock Issued During Period, Shares, Other		995,000	3,471,000	1,929,000
Issuance of equity awards, net		479,000	357,000	268,000
Preferred Stock [Member]
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Issuance of stock	583,334
Stock Issued During Period, Shares, Other		0	0	0
Issuance of equity awards, net		0	0	0
Series A Preferred Stock [Member]
Earnings Per Share, Basic, by Common Class, Including Two Class Method [Line Items]
Preferred stock authorized shares					1
Liquidation value per share		$ 1	$ 1		$ 1
Shares issued		1	1		1
Series B Preferred Stock [Member]
Earnings Per Share, Basic, by Common Class, Including Two Class Method [Line Items]
Liquidation value per share		$ 0	$ 0
Shares issued		0	0
Common stock shares converted from preferred		0	(583,000)	0
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Issuance of stock		0	583,000	0
Common stock shares converted from preferred		0	583,000	0