Repurchases Of Common Stock (Tables)

9 Months Ended

Sep. 30, 2011

Repurchases Of Common Stock [Abstract]

Schedule Of Common Stock Repurchases

	For the Three Months Ended September 30,				For the Nine Months Ended September 30,
	2011		2010		2011		2010
Shares repurchased		886		567		2,183		2,080
Total cost of shares repurchased	$	67,597	$	33,433	$	166,016	$	117,157
Average cost per share	$	76.27	$	58.98	$	76.04	$	56.32