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Fair Value Measurements (Summary Of Financial Assets And Liabilities Measured At Fair Value On Recurring Basis) (Details) (Fair Value, Measurements, Recurring [Member], USD $) In Thousands, unless otherwise specified	Dec. 31, 2012	Dec. 31, 2012 Non-Qualified Deferred Compensation Assets [Member]	Dec. 31, 2011 Non-Qualified Deferred Compensation Assets [Member]	Dec. 31, 2011 Interest Rate Swap [Member]	Dec. 31, 2012 Non Qualified Deferred Compensation Liabilities [Member]	Dec. 31, 2011 Non Qualified Deferred Compensation Liabilities [Member]	Dec. 31, 2012 Contingent Consideration [Member]	Dec. 31, 2012 Level 1 [Member]	Dec. 31, 2012 Level 1 [Member] Non-Qualified Deferred Compensation Assets [Member]	Dec. 31, 2011 Level 1 [Member] Non-Qualified Deferred Compensation Assets [Member]	Jun. 30, 2012 Level 2 [Member]	Dec. 31, 2012 Level 2 [Member] Non-Qualified Deferred Compensation Assets [Member]	Dec. 31, 2011 Level 2 [Member] Non-Qualified Deferred Compensation Assets [Member]	Dec. 31, 2011 Level 2 [Member] Interest Rate Swap [Member]	Dec. 31, 2012 Level 2 [Member] Non Qualified Deferred Compensation Liabilities [Member]	Dec. 31, 2011 Level 2 [Member] Non Qualified Deferred Compensation Liabilities [Member]	Dec. 31, 2012 Level 3 [Member] Contingent Consideration [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Available-for-sale Securities, Fair Value Disclosure	$ 9,224							$ 9,224
Other long-term liabilities					13,515	12,975									13,515	12,975
Accounts payable					125	2,790	9,890								125	2,790	9,890
Intangible and other long-term assets	$ 1,286	$ 11,343	$ 10,597	$ 1,904					$ 825	$ 815	$ 1,286	$ 10,518	$ 9,782	$ 1,904

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- Definition

This element represents the portion of the balance sheet assertion valued at fair value by the entity whether such amount is presented as a separate caption or as a parenthetical disclosure. Additionally, this element may be used in connection with the fair value disclosures required in the footnote disclosures to the financial statements. The element may be used in both the balance sheet and disclosure in the same submission. This item represents Available-for-sale Securities which consist of all investments in certain debt and equity securities neither classified as trading or held-to-maturity securities. A debt security represents a creditor relationship with an enterprise. Debt securities include, among other items, US Treasury securities, US government securities, municipal securities, corporate bonds, convertible debt, commercial paper, and all securitized debt instruments. An equity security represents an ownership interest in an enterprise or the right to acquire or dispose of an ownership interest in an enterprise at fixed or determinable prices. Equity securities include, among other things, common stock, certain preferred stock, warrant rights, call options, and put options, but do not include convertible debt. An entity may opt to provide the reader with additional narrative text to better understand the nature of investments in debt and equity securities which are categorized as Available-for-sale.

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