Stock-Based Compensation - Additional Information (Details) - USD ($)
$ / shares in Units, $ in Thousands, shares in Millions |
1 Months Ended |
12 Months Ended |
Jan. 31, 2018 |
Dec. 31, 2017 |
Dec. 31, 2016 |
Dec. 31, 2015 |
| Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |
|
|
|
|
| Number of exercisable options, out of the money (less than 0.1 million) |
|
0.1
|
|
|
| Vested or expected to vest |
|
0.3
|
|
|
| Vested or expected to vest, weighted average exercise price (in dollars per share) |
|
$ 22.74
|
|
|
| Vested or expected to vest, aggregate intrinsic value |
|
$ 2,700
|
|
|
| Vested or expected to vest, weighted average remaining contractual life |
|
7 years 5 months 1 day
|
|
|
| Expected life |
|
7 years
|
|
|
| Compensation cost for awards |
|
$ 4,467
|
$ 4,649
|
|
| Equity Based Awards |
|
|
|
|
| Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |
|
|
|
|
| Unrecognized compensation costs |
|
$ 2,900
|
|
|
| Unrecognized compensation costs, period for recognition |
|
1 year 10 months 2 days
|
|
|
| Compensation cost for awards |
|
$ 2,863
|
3,982
|
|
| Liability Based Awards |
|
|
|
|
| Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |
|
|
|
|
| Share-based liabilities paid |
|
100
|
500
|
|
| Unrecognized compensation costs |
|
$ 1,500
|
|
|
| Unrecognized compensation costs, period for recognition |
|
1 year 10 months 2 days
|
|
|
| Compensation cost for awards |
|
$ 1,604
|
667
|
|
| Non-Qualified Stock Options (NQO) |
|
|
|
|
| Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |
|
|
|
|
| Expiration from the date of grant |
|
10 years
|
|
|
| Stock price (in dollars per share) |
|
$ 30.85
|
|
|
| Options exercised in period, intrinsic value |
|
$ 1,400
|
$ 1,600
|
$ 200
|
| Expected life |
|
7 years
|
7 years
|
7 years
|
| Restricted Stock Units (RSUs) |
|
|
|
|
| Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |
|
|
|
|
| RSU's vested in period, fair value |
|
$ 4,500
|
$ 3,400
|
$ 3,000
|
| Key Employees | Total Shareholder Return Awards (TSR) |
|
|
|
|
| Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |
|
|
|
|
| Vesting period |
|
3 years
|
|
|
| Aggregate award target value |
|
$ 1,500
|
1,500
|
$ 1,800
|
| Compensation cost for awards |
|
1,000
|
|
|
| Compensation and other employee benefits non-current |
|
$ 1,900
|
$ 900
|
|
| Key Employees | Minimum | Total Shareholder Return Awards (TSR) |
|
|
|
|
| Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |
|
|
|
|
| Percentage of shareholder return award target |
|
0.00%
|
|
|
| Key Employees | Maximum | Total Shareholder Return Awards (TSR) |
|
|
|
|
| Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |
|
|
|
|
| Percentage of shareholder return award target |
|
200.00%
|
|
|
| 2014 Omnibus Plan |
|
|
|
|
| Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |
|
|
|
|
| Maximum number of shares of Company's common stock authorized for issuance (in shares) |
|
2.6
|
|
|
| Shares available (in shares) |
|
1.3
|
|
|
| Share-based Compensation Award, Tranche One | Restricted Stock Units (RSUs) |
|
|
|
|
| Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |
|
|
|
|
| Vesting increments |
|
33.33%
|
|
|
| Share-based Compensation Award, Tranche One | Capital lease obligations | Maximum |
|
|
|
|
| Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |
|
|
|
|
| Vesting increments |
|
33.33%
|
|
|
| Share-based Compensation Award, Tranche Two | Restricted Stock Units (RSUs) |
|
|
|
|
| Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |
|
|
|
|
| Vesting increments |
|
33.33%
|
|
|
| Share-based Compensation Award, Tranche Two | Capital lease obligations | Maximum |
|
|
|
|
| Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |
|
|
|
|
| Vesting increments |
|
33.33%
|
|
|
| Share-based Compensation Award, Tranche Three | Restricted Stock Units (RSUs) |
|
|
|
|
| Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |
|
|
|
|
| Vesting increments |
|
33.33%
|
|
|
| Share-based Compensation Award, Tranche Three | Capital lease obligations | Maximum |
|
|
|
|
| Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |
|
|
|
|
| Vesting increments |
|
33.33%
|
|
|
| Subsequent event | Key Employees | Total Shareholder Return Awards (TSR) |
|
|
|
|
| Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |
|
|
|
|
| Cash paid to settle awards |
$ 600
|
|
|
|