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Stock-Based Compensation - Information by Plan (Details) | 12 Months Ended
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Dec. 31, 2017 shares
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |
Term of plans / awards | 10 years
Remaining Shares Available for Grant Under the Plan | 448,051
Outstanding Shares Granted Under the Plan | 681,439
Minimum |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |
Vesting period | 1 year
Maximum |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |
Vesting period | 4 years
Stock appreciation rights and performance stock units |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |
Awards granted to date (in shares) | 0
Stock options |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |
Term of plans / awards | 10 years
Stock options | Minimum |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |
Vesting period | 3 years
Stock options | Maximum |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |
Vesting period | 4 years
Non-vested restricted stock award | Minimum |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |
Vesting period | 1 year
Non-vested restricted stock award | Maximum |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |
Vesting period | 3 years
1999A Stock Incentive Plan |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |
Initial Shares Available for Grant Under the Plan | 1,000,000
Remaining Shares Available for Grant Under the Plan | 0
Outstanding Shares Granted Under the Plan | 7,500
2003 Stock Incentive Plan |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |
Initial Shares Available for Grant Under the Plan | 1,000,000
Remaining Shares Available for Grant Under the Plan | 0
Outstanding Shares Granted Under the Plan | 14,391
2006 Stock Incentive Plan |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |
Initial Shares Available for Grant Under the Plan | 1,000,000
Remaining Shares Available for Grant Under the Plan | 0
Outstanding Shares Granted Under the Plan | 82,572
2010 Stock Incentive Plan |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |
Initial Shares Available for Grant Under the Plan | 1,000,000
Remaining Shares Available for Grant Under the Plan | 0
Outstanding Shares Granted Under the Plan | 203,303
2014 Stock Incentive Plan |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |
Initial Shares Available for Grant Under the Plan | 1,100,000
Remaining Shares Available for Grant Under the Plan | 448,051
Outstanding Shares Granted Under the Plan | 373,673

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- Definition Share-based Compensation Arrangement by Share-based Payment Award, Awards, Cumulative Grants to Date + References No definition available. + Details
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- Definition Share-based Compensation Arrangement by Share-based Payment Award, Options and Equity Instruments Other Than Options, Outstanding, Number + References No definition available. + Details
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- Definition Period which an employee's right to exercise an award is no longer contingent on satisfaction of either a service condition, market condition or a performance condition, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days. + 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)(1) -URI http://asc.fasb.org/extlink&oid=96867065&loc=d3e5070-113901 + 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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- 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=96867065&loc=d3e5070-113901 + Details
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- Definition The difference between the maximum number of shares (or other type of equity) authorized for issuance under the plan (including the effects of amendments and adjustments), and the sum of: 1) the number of shares (or other type of equity) already issued upon exercise of options or other equity-based awards under the plan; and 2) shares (or other type of equity) reserved for issuance on granting of outstanding awards, net of cancellations and forfeitures, if applicable. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -URI http://asc.fasb.org/extlink&oid=96867065&loc=d3e5070-113901 + Details
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- Definition Period from grant date that an equity-based award expires, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days. + 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)(2) -URI http://asc.fasb.org/extlink&oid=96867065&loc=d3e5070-113901 + Details
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