Earnings Per Share (Computation Of Basic And Diluted Earnings Per Share ) (Details) (USD $) In Thousands, except Per Share data, unless otherwise specified	3 Months Ended
	Mar. 31, 2014	Mar. 31, 2013
Earnings Per Share [Abstract]
Net income from continuing operations	$ 47,973	$ 14,936
Net income/(loss) from discontinued operations	(591)	(317)
Net income	$ 47,382
Average shares used in basic computation	66,037	60,054
Dilutive effect of stock options and units	9,654	9,135
Average shares used in diluted computation	75,691	69,189
Income from continuing operations	$ 0.73	$ 0.25
Income from discontinued operations	$ (0.01)	$ (0.01)
Earnings per basic common share	$ 0.72	$ 0.24
Income from continuing operations	$ 0.63	$ 0.22
Income from discontinued operations		$ (0.01)
Earnings per diluted common share	$ 0.63	$ 0.21