Stock-Based Compensation - Additional Information (Details) - USD ($)
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3 Months Ended |
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Mar. 31, 2019 |
Mar. 31, 2018 |
Oct. 07, 2016 |
| Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |
|
|
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| Intrinsic value of options exercised |
$ 0
|
$ 40,000
|
|
| Option exercises (in shares) |
0
|
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| Restricted stock awards |
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| Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |
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| Weighted average grant-date fair value (in dollars per share) |
$ 12.51
|
$ 19.00
|
|
| Fair value of vested restricted stock awards |
$ 1,400,000
|
$ 1,200,000
|
|
| Unrecognized compensation costs |
$ 24,500,000
|
|
|
| Unrecognized compensation costs, period for recognition |
2 years 1 month 6 days
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| Stock option awards |
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| Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |
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| Unrecognized compensation costs, period for recognition |
1 year 6 months
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| Fair value of stock options vested |
$ 3,400,000
|
$ 3,400,000
|
|
| Unrecognized compensation costs for stock options |
11,100,000
|
|
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| Performance stock units |
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| Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |
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| Unrecognized compensation costs |
$ 5,100,000
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|
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| Unrecognized compensation costs, period for recognition |
1 year 10 months 24 days
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| 2016 Long Term Incentive Plan |
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| Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |
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| Number of shares authorized (in shares) |
|
|
16,500,000
|
| Number of shares available for grant (in shares) |
8,966,734
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|
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| 2016 Long Term Incentive Plan | Stock option awards |
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| Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |
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| Vesting period |
3 years
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| Option expiration period |
10 years
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| Officer and employees | Restricted stock awards |
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| Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |
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| Vesting period |
3 years
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| Director | Restricted stock awards |
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| Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |
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| Vesting period |
1 year
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