CONSOLIDATED STATEMENTS OF SHAREHOLDERS' EQUITY AND NONCONTROLLING INTEREST (Parenthetical) (Indemnity, USD $)	12 Months Ended
	Dec. 31, 2012	Dec. 31, 2011	Dec. 31, 2010
Class A
Dividends declared (in dollars per share)	$ 4.25	$ 2.0975	$ 1.955
Class B
Dividends declared (in dollars per share)	$ 637.50	$ 314.625	$ 293.25