Stock-Based Compensation Plans - 2013 Omnibus Equity Incentive Plan - Award Limitations - Additional Information (Detail) |
12 Months Ended |
|---|---|
|
Dec. 31, 2017
Incentive_Plan
shares
| |
| Disclosure of Compensation Related Costs, Share-based Payments [Abstract] | |
| Common stock shares reserved for issuance of awards | 5,500,000 |
| Common stock shares available for grant | 5,586,917 |
| Increase of common stock share reserve approved | 3,300,000 |
| Number of active equity plans | Incentive_Plan | 1 |
| Equity incentive plan amendment, shareholder approval date | May 04, 2017 |
| Equity incentive plan amendment, board of directors approval date | 2017-02 |
| X | ||||||||||
- Definition Number Of Active Equity Plans No definition available.
|
| X | ||||||||||
- Definition Aggregate share reserve increases approved under the 2013 Plan. No definition available.
|
| X | ||||||||||
- Definition 2013 Omnibus Equity Incentive Plan amendment, board of directors approval date. No definition available.
|
| X | ||||||||||
- Definition 2013 Omnibus Equity Incentive Plan amendment, shareholder approval date. No definition available.
|
| X | ||||||||||
- Definition Aggregate number of common shares reserved for future issuance. Reference 1: http://www.xbrl.org/2003/role/presentationRef
|
| X | ||||||||||
- References No definition available.
|
| X | ||||||||||
- 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. Reference 1: http://www.xbrl.org/2003/role/presentationRef
|