Goodwill And Other Intangible Assets (Narrative) (Details) (USD $)	3 Months Ended	9 Months Ended	12 Months Ended
Sep. 30, 2011	Sep. 30, 2010	Sep. 30, 2011	Sep. 30, 2010	Dec. 31, 2010
Goodwill And Other Intangible Assets [Abstract]
Intangible assets amortization expense	$ 1,600,000	$ 1,700,000	$ 4,800,000	$ 5,100,000
Changes in carrying amount of goodwill			0
Goodwill impairment			$ 0		$ 0

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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+ Details