Capital Stock And Share-Based Compensation (Tables)

12 Months Ended

Dec. 31, 2011

Share-based Compensation Arrangement by Share-based Payment Award [Line Items]

Schedule Of Employee Stock Purchase Plan Period

Employee Stock Purchase Plan Period	Shares Issued		Price
2009 and Prior		1,642,504	$	12.18
January 1, 2010 to March 31, 2010		33,377		46.94
April 1, 2010 to June 30, 2010		44,902		37.38
July 1, 2010 to September 30, 2010		74,836		20.23
October 1, 2010 to December 31, 2010		55,413		28.48
January 1, 2011 to March 31, 2011		38,752		29.75
April 1, 2011 to June 30, 2011		54,323		22.64
July 1, 2011 to September 30, 2011		94,301		12.60
October 1, 2011 to December 31, 2011		103,815		9.27
		2,142,223

Schedule Of Stock Option Activity

	Number of Shares			Weighted average exercise price		Weighted average contractual life (years)
Outstanding options at January 1, 2011		298,679		$	18.10		3.29
Granted		—			—
Exercised		(27,337	)		8.98
Canceled, forfeited or expired		(3,335	)		20.23
Outstanding options at December 31, 2011		268,007		$	19.00		2.49
Exercisable options at December 31, 2011		268,007		$	19.00		2.49

Schedule Of Non-Vested Stock Award Activity

	Number of Shares			Weighted average grant date fair value
Non-vested stock at January 1, 2011		408,350		$	45.43
Granted		458,869			27.05
Vested		(160,973	)		42.94
Canceled, forfeited or expired		(137,396	)		39.91
Non-vested stock at December 31, 2011		568,850		$	32.64

Service-Based And Performance-Based Awards [Member]

Share-based Compensation Arrangement by Share-based Payment Award [Line Items]

Schedule Of Non-Vested Stock Award Activity

	Number of Shares			Weighted average grant date fair value
Non-vested stock units at January 1, 2011		46,894		$	37.65
Granted		31,390			27.40
Vested		(49,856	)		37.04
Canceled, forfeited or expired		—			—
Non-vested stock units at December 31, 2011		28,428		$	27.40