Stockholders' Equity (Summary Of The Option And Stock Appreciation Rights Outstanding) (Details) (USD $)	12 Months Ended		12 Months Ended
	Dec. 31, 2011	Dec. 31, 2012 Y	Dec. 31, 2012 $1.00 - $20.00 [Member] Y	Dec. 31, 2012 $20.01 - $50.00 [Member] Y	Dec. 31, 2012 $50.01 - $100.00 [Member] Y	Dec. 31, 2012 $100.01 - $150.00 [Member] Y
Range of Exercise Price, Lower limit	$ 10.00		$ 1.00	$ 20.01	$ 50.01	$ 100.01
Range of Exercise Price, Upper limit			$ 20.00	$ 50.00	$ 100.00	$ 150.00
Number of options/SARs, outstanding, December 31, 2012		373,899	30,147	264,239	67,863	11,650
Weighted average remaining life		4.7	8.87	5.04	2.22	3.78
Weighted Average Exercise Price per Share, Outstanding, December 31, 2012		$ 43.90	$ 8.33	$ 38.79	$ 68.00	$ 112.05
Number of options currently exercisable		267,149	7,275	180,383	67,841	11,650
Weighted average exercise price per vested share		$ 49.13	$ 10.39	$ 39.53	$ 68.00	$ 112.05