Share-Based Compensation (Share-Based Compensation Arrangement Expenses Recognized) (Details) (USD $) In Thousands, unless otherwise specified	3 Months Ended		9 Months Ended
	Sep. 30, 2012	Sep. 30, 2011	Sep. 30, 2012	Sep. 30, 2011
Disclosure of Compensation Related Costs, Share-based Payments [Abstract]
Salaries, wages and employee benefits	$ 1,542	$ 316	$ 11,371	$ 9,485
Deferred income tax benefit	(596)	(89)	(4,414)	(3,665)
Net share-based compensation expense	$ 946	$ 227	$ 6,957	$ 5,820