Earnings Per Share (Computation Of Basic And Diluted Earnings Per Share ) (Details) (USD $) In Thousands, except Per Share data, unless otherwise specified	12 Months Ended
	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011
Earnings Per Share [Abstract]
Net income from continuing operations	$ 172,907	$ 145,296	$ 84,269
Net income/(loss) from discontinued operations	(10,894)	(6,723)	(135)
Net income	$ 162,013		$ 84,134
Average shares used in basic computation	63,568	53,563	52,418
Dilutive effect of stock options and units	9,936	9,374	10,640
Average shares used in diluted computation	73,504	62,937	63,058
Income from continuing operations	$ 2.72	$ 2.71	$ 1.61
Income from discontinued operations	$ (0.17)	$ (0.12)
Earnings per basic common share	$ 2.55	$ 2.59	$ 1.61
Income from continuing operations	$ 2.35	$ 2.31	$ 1.34
Income from discontinued operations	$ (0.15)	$ (0.11)
Earnings per diluted common share	$ 2.20	$ 2.20	$ 1.34