Shareholders' Equity (Details) (USD $) In Millions, except Share data, unless otherwise specified	6 Months Ended		6 Months Ended		6 Months Ended
	Jun. 30, 2012	Dec. 31, 2011	Jun. 30, 2012 Series A Preferred Stock [Member]	Feb. 20, 2009 Series A Preferred Stock [Member]	Jun. 30, 2012 Common Class A [Member]	Jun. 30, 2012 Common Class B [Member]
Preferred Stock [Abstract]
Preferred stock, shares issued (in shares)	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 for first five years (in hundredths)			5.00%
Preferred stock cumulative dividend rate percentage for thereafter five years (in hundredths)			9.00%
Number of years for warrant issued to treasury	10 years
Warrants, exercise price (in dollars per share)	$ 4.13
Common Stock [Abstract]
Number of convertible share (in shares)					1	1
Number of converted share (in shares)					1.15	1.15
Number of vote for class of shares held					1	10
Payments of Dividends [Abstract]
Value on which quarterly dividend suspended			30.4
Preferred stock dividend in arrears			$ 4.9
Number of directors appointed	2