Consolidated Condensed Statement of Equity (Parenthetical)	6 Months Ended
	Jun. 30, 2012
Consolidated Condensed Statement of Equity [Abstract]
Phantom and restricted stock issuances (in shares)	11,323
Stock options exercised (in shares)	22,095
Stock repurchase (in shares)	13,948,687
Conversions from Class B to common stock (in shares)	1,323,322