Goodwill And Other Intangible Assets (Schedule Of Components Of Goodwill And Other Intangible Assets) (Details) (USD $) In Thousands	Jun. 30, 2011	Dec. 31, 2010	Jun. 30, 2010	Dec. 31, 2009
Goodwill And Other Intangible Assets
Goodwill	$ 320,411	$ 313,229	$ 254,295	$ 261,703
Other intangible assets (net of accumulated amortization)	45,030	48,210
Goodwill and intangible assets net	$ 365,441	$ 361,439

Carrying amount as of the balance sheet date, which is the cumulative amount paid, adjusted for any amortization recognized prior to adoption of FAS 142 and for any impairment charges, in excess of the fair value of net assets acquired in one or more business combination transactions.

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Statement of Financial Accounting Standard (FAS)
-Number 142
-Paragraph 43

Name:	us-gaap_Goodwill
Namespace Prefix:	us-gaap
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant