Shareholders' Equity (Details) (USD $) In Millions, except Share data, unless otherwise specified	6 Months Ended		6 Months Ended		0 Months Ended	3 Months Ended	6 Months Ended				6 Months Ended	0 Months Ended	6 Months Ended
	Jun. 30, 2014	Dec. 31, 2013	Jun. 30, 2014 Warrant To Purchase Class A Common Stock [Member]	Feb. 20, 2009 Warrant To Purchase Class A Common Stock [Member]	Jun. 20, 2014 Series A Preferred Stock [Member]	Jun. 30, 2014 Series A Preferred Stock [Member]	Jun. 30, 2014 Series A Preferred Stock [Member]	Jul. 02, 2014 Series A Preferred Stock [Member]	Jun. 20, 2014 Series A Preferred Stock [Member]	Feb. 20, 2009 Series A Preferred Stock [Member]	Jun. 30, 2014 Common Class A [Member] Vote	Jun. 20, 2014 Common Class B [Member]	Jun. 30, 2014 Common Class B [Member] Vote	Jun. 20, 2014 Common Class B [Member]	Feb. 20, 2009 Capital Unit Preferred Stock And Warrant Member
Preferred Stock [Abstract]
Preferred stock, shares issued (in shares)	30,407	30,407							30,407	30,407
Preferred stock, liquidation value (in dollars per share)	$ 1,000	$ 1,000								$ 1,000
Number of shares to be purchased by warrant (in shares)				1,104,370
Aggregate purchase price															$ 30.4
Preferred stock cumulative dividend rate percentage beginning February 2014 (as a percent)	9.00%
Number of years for warrant issued to treasury			10 years
Warrants, exercise price (in dollars per share)			$ 4.13
Amount of approved purchase of preferred shares						14.0
Dividends in arrears eliminated								3.5
Preferred stock dividend in arrears	9.0						9.0
Share price (in dollars per share)									$ 1,207.11					$ 1.20
Shares allocated for repurchase (in shares)					11,551
Common Stock [Abstract]
ConvertibleStockConversionRatio													1.15
Number of vote for class of shares held											1		10
Common stock sold (in shares)												11,619,440
Payments of Dividends [Abstract]
Value on which quarterly dividend is suspended						$ 30.4	$ 30.4