Capital Stock Transactions

12 Months Ended

Dec. 31, 2012

Capital Stock Transactions [Abstract]

Capital Stock Transactions

20.  Capital Stock Transactions

On November 7, 2011 our Board of Directors authorized an additional $100 million of stock repurchases under the February 2011 repurchase program.  On February 22, 2011, our Board of Directors authorized $100 million of stock repurchases under the newly established February 2011 repurchase program.  On December 27, 2010, our Board of Directors authorized an additional $70 million to the April 2007 stock repurchase program.  We repurchased the following capital stock:

		For the Years Ended December 31,
		2012		2011		2010
Shares repurchased		932,706		2,602,513		1,648,047
Weighted average price per share	$	64.87	$	55.28	$	63.14

In addition to capital stock repurchased in the open market, we acquired the following amounts of treasury stock from the surrender of shares in connection with share-based compensation transactions for the years ended December 31, 2012, 2011  and 2010: $4.2 million, $4.0 million and $5.3 million, respectively.