Goodwill And Other Intangible Assets (Schedule of Goodwill) (Details) (USD $) In Thousands, unless otherwise specified	12 Months Ended
	Dec. 31, 2012	Dec. 31, 2011
Goodwill [Roll Forward]
Goodwill, gross at beginning of period	$ 519,138	$ 519,138
Accumulated impairment losses, at beginning of period	494,707	494,707
Goodwill, net at beginning of period	24,431	24,431
Impairment losses	0	0
Goodwill, gross at end of period	519,138	519,138
Accumulated impairment losses, at end of period	494,707	494,707
Goodwill, net at end of period	$ 24,431	$ 24,431