Stock-Based Compensation - Narrative (Details)
|
9 Months Ended |
|
|
Sep. 30, 2018
USD ($)
plan
shares
|
Dec. 31, 2017
shares
|
| Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |
|
|
| Number of share-based compensation plans | plan |
4
|
|
| Number of shares available for grant (in shares) |
0
|
|
| Stock Options |
|
|
| Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |
|
|
| Expiration term (in years) |
10 years
|
|
| Total unrecognized compensation expense related to non-vested stock | $ |
$ 0
|
|
| Restricted Stock |
|
|
| Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |
|
|
| Total unrecognized compensation expense related to non-vested stock | $ |
$ 100,000
|
|
| Total compensation cost not yet recognized, period for recognition (in years) |
1 year 3 months 18 days
|
|
| Stock Appreciation Rights (SARs) |
|
|
| Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |
|
|
| Number of awards outstanding (less than) (in shares) |
0
|
100,000
|
| Stock Incentive Plan 2011 |
|
|
| Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |
|
|
| Number of shares available for grant (in shares) |
287,566
|
|