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Fair Value Measurements (Financial Assets And Liabilities Measured At Fair Value) (Details) - USD ($) $ in Thousands | 3 Months Ended | 12 Months Ended
--- | --- | ---
Mar. 31, 2017 | Dec. 31, 2016
Deferred compensation plan investments (1) | $ 87,500 | [1] | $ 80,600
Participant Withdrawals From Deferred Compensation Plan Investments | 2,100 |  | 8,300
Diversification of share awards within deferred compensation plan | 1,642 |  | 25,400
Level 1 [Member] |  |  |
Deferred compensation plan investments (1) | 87,500 | [1] | 80,600
Level 2 [Member] |  |  |
Deferred compensation plan investments (1) | 0 | [1] | 0
Level 3 [Member] |  |  |
Deferred compensation plan investments (1) | $ 0 | [1] | $ 0
[1] | Approximately $2.1 million and $8.3 million of participant cash was withdrawn from our deferred compensation plan investments during the three months ended March 31, 2017 and the year ended December 31, 2016, respectively. Approximately $1.6 million and $25.4 million of shares in the compensation plan were diversified into the deferred compensation plan investments during the three months ended March 31, 2017 and the year ended December 31, 2016, respectively.

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- Definition Carrying amount as of the balance sheet date of assets held under deferred compensation agreements. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02.17) -URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682 + Details
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