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Equity Awards - Equity Awards Narrative (Details) | Dec. 31, 2016 shares
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Director Retainer [Member] |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |
Shares Approved for Issuance | 100,000
2011 Plan [Member] |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |
Fungible Ratio | 1.75
Shares Approved for Issuance | 3,246,588
2006 Plan [Member] |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |
Fungible Ratio | 2
Shares Approved for Issuance | 2,870,221
2002 Plan [Member] |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |
Fungible Ratio | 1
Shares Approved for Issuance | 2,111,567
Stock Options [Member] |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |
Fungible Ratio | 1

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- Definition Fungible ratio applies to restricted shares of common stock granted and their appreciation rights counted as one share against the aggregate available to issue. + References No definition available. + Details
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- Definition The maximum number of shares (or other type of equity) originally approved (usually by shareholders and board of directors), net of any subsequent amendments and adjustments, for awards under the equity-based compensation plan. As stock or unit options and equity instruments other than options are awarded to participants, the shares or units remain authorized and become reserved for issuance under outstanding awards (not necessarily vested). + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (a)(3) -URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5070-113901 + Details
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