Consolidated Statements of Equity (USD $) In Millions, except Share data, unless otherwise specified	Total	Preferred Stock [Member]	Common Stock [Member]	Additional Paid-in Capital [Member]	Retained Earnings (Accumulated Deficit) [Member]	Accumulated Other Comprehensive Income [Member]	Treasury Stock [Member]	Noncontrolling Interest [Member]
Balance at Dec. 31, 2009
Other comprehensive income (loss), net of tax:
Net income					$ 0
Balance at Dec. 31, 2010	312.9	0	0	284.7	17.8	9.0	(11.3)	12.7
Balance, preferred shares (in shares) at Dec. 31, 2010		132,550
Balance, common shares (in shares) at Dec. 31, 2010			40,179,906
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Issuance of stock, net of issuance costs	123.7		0	123.7
Issuance of stock, net of issuance costs (in shares)	11,700,000		11,700,000
Repurchase of common shares	(0.5)						(0.5)
Repurchase of common stock (in shares)			(51,958)
Repurchase and retirement of warrants	(6.1)			(6.1)
Common stock issued under 2009 Equity Participation Plan net of shares forfeited (in shares)	(3,000)
Stock-based compensation	5.0			5.0
Shares forfeited, net of 3,000 shares of common stock issued under the 2009 Equity Participation Plan (in shares)			(1,950)
Shares forfeited, net of 3,000 shares of common stock issued under the 2009 Equity Participation Plan	0
Other comprehensive income (loss), net of tax:
Foreign currency translation gain (loss), net of tax	1.5					1.5
Forward foreign currency loss, net of tax	(2.3)					(2.3)
Unrealized gain (loss) on marketable securities	(3.2)					(3.2)
Preferred stock dividends paid	(8.7)				(8.7)
Common stock dividends	(5.7)				(5.7)
Accretion of preferred stock issuance costs	0			0	0
Net income	7.5				6.3			1.2
Contributions from noncontrolling interests	4.4							4.4
Distributions to noncontrolling interests	(5.1)							(5.1)
Distribution of marketable securities to noncontrolling interests	(2.8)							(2.8)
Distributions to noncontrolling interests	(7.0)							(7.0)
Balance at Dec. 31, 2011	413.6	0	0	407.3	9.7	5.0	(11.8)	3.4
Balance, common shares (in shares) at Dec. 31, 2011			51,825,998
Balance, preferred shares (in shares) at Dec. 31, 2011		132,550
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Issuance of stock, net of issuance costs	106.3		0	106.3
Issuance of stock, net of issuance costs (in shares)	8,625,000		8,625,000
Repurchase of common shares	0						0
Repurchase of common stock (in shares)			(3,400)
Repurchase and retirement of warrants	(1.6)			(1.6)
Common stock issued under the 2009 Equity Participation Plan	0			0
Common stock issued under 2009 Equity Participation Plan net of shares forfeited (in shares)			(3,175,000)
Stock-based compensation	3.5			3.5
Other comprehensive income (loss), net of tax:
Foreign currency translation gain (loss), net of tax	(1.5)					(1.4)
Forward foreign currency loss, net of tax	5.7					5.7
Unrealized gain (loss) on marketable securities	3.3					3.3
Preferred stock dividends paid	(8.1)				(8.1)
Common stock dividends	(11.7)				(11.7)
Accretion of preferred stock issuance costs	0			0	0
Net income	6.7				4.2			2.5
Contributions from noncontrolling interests	0.4							0.4
Acquistion of noncontrolling interests	(0.6)			(2.7)			2.0	0.1
Acquistion of noncontrolling interests (in shares)			150,000
Consolidation of noncontrolling interests (Note 4)	7.6							7.6
Distributions to noncontrolling interests	(4.9)							(4.9)
Balance at Dec. 31, 2012	518.8	0	0	512.8	(5.9)	12.6	(9.8)	9.1
Balance, common shares (in shares) at Dec. 31, 2012	63,772,598		63,772,598
Balance, preferred shares (in shares) at Dec. 31, 2012		132,550
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Stock Issued During Period, Value, Stock Options Exercised	15.4			15.4
Exercise of Warrants, Shares	2,684,670		1,771,862
Issuance of stock, net of issuance costs	275.9		0	275.9
Issuance of stock, net of issuance costs (in shares)	17,250,000		17,250,000
Repurchase and retirement of warrants	(1.4)			(1.4)
Common stock issued under the 2009 Equity Participation Plan	0		0
Common stock issued under 2009 Equity Participation Plan net of shares forfeited (in shares)			(10,038)
Treasury Stock, Retired, Cost Method, Amount				(9.8)			9.8
Stock retired due to RSG vesting (in shares)			(191,815)
Shares retired due to RSG Vesting	(3.8)			(3.8)
Stock-based compensation	7.5			7.5
RSG plan modification	4.7			4.7
Other Comprehensive Income (Loss), Foreign Currency Transaction and Translation Adjustment, Net of Tax	(6.5)					(6.5)
Shares forfeited, net of 3,000 shares of common stock issued under the 2009 Equity Participation Plan (in shares)	(146,638)
Other comprehensive income (loss), net of tax:
Foreign currency translation gain (loss), net of tax	(9.3)
Forward foreign currency loss, net of tax	3.1					3.1
Unrealized gain (loss) on marketable securities	0
Preferred stock dividends paid	(8.1)				(8.1)
Common stock dividends	(21.8)				(21.8)
Accretion of preferred stock issuance costs	0			0	0
Net income	13.9				(6.4)			20.3
Contributions from noncontrolling interests	1.4							1.4
Consolidation of noncontrolling interests (Note 4)	20.3							20.3
Distributions to noncontrolling interests	(0.5)							(0.5)
Balance at Dec. 31, 2013	$ 818.9	$ 0	$ 0	$ 801.3	$ (42.2)	$ 9.2	$ 0	$ 50.6
Balance, common shares (in shares) at Dec. 31, 2013	82,592,607		82,592,607
Balance, preferred shares (in shares) at Dec. 31, 2013		132,550