XML 79 R7.htm IDEA: XBRL DOCUMENT

Consolidated Statements Of Changes In Shareholders' Equity (Parenthetical)	12 Months Ended
	Dec. 31, 2011
Common Class A [Member]
Statement of Stockholders' Equity [Abstract]
Repurchase of Class B common stock, shares	112,471
Common Class B [Member]
Statement of Stockholders' Equity [Abstract]
Repurchase of Class B common stock, shares	37,863

Number of shares that have been repurchased during the period and have not been retired and are not held in treasury. Some state laws may govern the circumstances under which an entity may acquire its own stock and prescribe the accounting treatment therefore. This element is used when state law does not recognize treasury stock.

+ References+ Details