Goodwill And Related Intangible Assets (Narrative) (Details) (USD $)	6 Months Ended	12 Months Ended
Jun. 30, 2011	Dec. 31, 2010
Goodwill And Related Intangible Assets
Accumulated impairment losses	$ 125,597,000	$ 125,597,000
Intangible asset impairment charges	$ 0	$ 76,964,000

Impairment recognized during the period and allocated to the reportable segment that results from the write-down of indefinite-lived intangible assets after comparing the implied fair value of reporting unit indefinite-lived intangible assets with the carrying amount of that indefinite-lived intangible assets, which are assessed at least annually for impairment.

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 350
-SubTopic 30
-Section 50
-Paragraph 3
-Subparagraph (b),(d)
-URI http://asc.fasb.org/extlink&oid=6905858&loc=d3e16373-109275

Name:	us-gaap_IndefiniteLivedIntangibleAssetsImpairmentLosses
Namespace Prefix:	us-gaap
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	duration