Goodwill And Related Intangible Assets (Narrative) (Details) (USD $)	12 Months Ended
Dec. 31, 2011	Dec. 31, 2010	Dec. 31, 2009
Goodwill And Related Intangible Assets [Abstract]
Accumulated impairment losses	$ 125,597,000	$ 125,597,000
Goodwill impairment		$ 66,589,000	$ 59,008,000

Loss recognized during the period that results from the write-down of goodwill after comparing the implied fair value of reporting unit goodwill with the carrying amount of that goodwill. Goodwill is assessed at least annually for impairment.

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