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Stock Compensation - Restricted Stock and Performance Share Grants - Performance Share Grants (Details) - Performance share grants | 12 Months Ended
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Dec. 31, 2017 shares
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |
Below threshold performance | 0
Threshold performance | 169,178
Target performance | 387,886
Maximum performance | 589,415

X
- Definition Performance Awards Granted with Performance Conditions, Number of Shares to be Issued, Below Threshold Performance + References No definition available. + Details
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- Definition Performance Awards Granted with Performance Conditions, Maximum Number of Shares to be Issued, at Maximum Performance + References No definition available. + Details
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- Definition Performance Awards Granted with Performance Conditions, Minimum Number of Shares to be Issued, at Threshold Performance + References No definition available. + Details
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- Definition Performance Awards Granted with Performance Conditions, Number of Shares to be Issued, at Target Performance + References No definition available. + Details
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- Definition Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table. + References No definition available. + Details
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- Details
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