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Stock-Based Compensation Plans - Additional Information (Details) - USD ($) $ in Thousands | 3 Months Ended | 6 Months Ended |
--- | --- | --- | ---
Jun. 30, 2020 | Jun. 30, 2019 | Jun. 30, 2020 | Jun. 30, 2019 | Jun. 09, 2020
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |  |
Stock-based compensation expense | $ 7,932 | $ 14,372 | $ 14,882 | $ 20,957 |
Stock Options |  |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |  |
Incentive plan, total intrinsic value of stock options exercised |  |  | 10,500 | $ 6,000 |
Unrecognized compensation costs | $ 100 |  | $ 100 |  |
Unrecognized compensation costs, weighted average recognition period |  |  | 8 months 12 days |  |
LTIP Performance Shares |  |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |  |
Number of shares vested |  |  | 668,240 |  |
Shares withheld to pay employees' portion of minimum payroll withholding taxes |  |  | 165,237 |  |
Restricted Share Awards (RSAs) |  |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |  |
Number of shares vested |  |  | 88,913 |  |
Shares withheld to pay employees' portion of minimum payroll withholding taxes |  |  | 28,233 |  |
Total Shareholder Return Awards (TSRs) |  |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |  |
Number of shares vested |  |  | 199,413 |  |
Payout rate | 93.00% |  | 93.00% |  |
Vesting performance period |  |  | 3 years |  |
Shares withheld to pay employees' portion of minimum payroll withholding taxes |  |  | 53,033 |  |
Unrecognized compensation costs | $ 27,100 |  | $ 27,100 |  |
Unrecognized compensation costs, weighted average recognition period |  |  | 1 year 10 months 24 days |  |
Total Shareholder Return Awards (TSRs) | Minimum |  |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |  |
Payout rate | 0.00% |  | 0.00% |  |
Total Shareholder Return Awards (TSRs) | Maximum |  |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |  |
Payout rate | 200.00% |  | 200.00% |  |
Restricted Share Units (RSUs) |  |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |  |
Number of shares vested |  |  | 399,605 |  |
Vesting performance period |  |  | 3 years |  |
Award vesting rights percentage |  |  | 33.00% |  |
Shares withheld to pay employees' portion of minimum payroll withholding taxes |  |  | 109,652 |  |
Unrecognized compensation costs | $ 30,100 |  | $ 30,100 |  |
Unrecognized compensation costs, weighted average recognition period |  |  | 2 years 1 month 6 days |  |
2017 Employee Stock Purchase Plan |  |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |  |
Shares issued under ESPP |  |  | 72,228 | 60,362 |
2020 Equity and Incentive Compensation Plan |  |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |  |
Number of shares available for grant |  |  |  |  | 6,658,754
2016 Equity and Performance Incentive Plan |  |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |  |
Stock-based compensation expense | 7,900 | 14,400 | $ 14,900 | $ 21,000 |
Stock-based compensation expense, tax benefits | $ 1,400 | $ 2,800 | $ 2,800 | $ 4,000 |

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- Definition Amount of cost not yet recognized for nonvested award under share-based payment arrangement. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (i) -URI http://asc.fasb.org/extlink&oid=120381028&loc=d3e5070-113901 + Details
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- Definition Weighted-average period over which cost not yet recognized is expected to be recognized for award under share-based payment arrangement, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents reported fact of one year, five months, and thirteen days. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (i) -URI http://asc.fasb.org/extlink&oid=120381028&loc=d3e5070-113901 + Details
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- 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. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -URI http://asc.fasb.org/extlink&oid=120381028&loc=d3e5070-113901 + Details
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