Stock-Based Compensation (Details) |
3 Months Ended | 9 Months Ended | |||
---|---|---|---|---|---|
Sep. 30, 2017
USD ($)
shares
|
Sep. 30, 2016
USD ($)
|
Sep. 30, 2017
USD ($)
plan
shares
|
Sep. 30, 2016
USD ($)
|
Dec. 31, 2016
shares
|
|
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] | |||||
Stock-based compensation expense | $ | $ 200,000 | $ 200,000 | $ 300,000 | $ 600,000 | |
Number of share-based compensation plans | plan | 4 | ||||
Number of shares available for grant (in shares) | 0 | 0 | |||
Stock Appreciation Rights (SARs) | |||||
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] | |||||
Stock-based compensation expense | $ | $ 0 | ||||
Number of awards outstanding (less than) (in shares) | 100,000 | 100,000 | 200,000 | ||
Stock Incentive Plan 2011 | |||||
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] | |||||
Number of shares available for grant (in shares) | 186,225 | 186,225 |