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Stock Based Compensation - Narrative (Details) - USD ($) $ / shares in Units, $ in Thousands | 12 Months Ended
--- | ---
Dec. 31, 2019 | Dec. 31, 2018 | Dec. 31, 2017
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |
Total stock-based compensation expense included in selling, general and administrative expense | $ 2,700 | $ 1,000 |
Stock-based compensation expense, tax benefit | 121 | 18 |
Total stock-based compensation expense | $ 2,706 | $ 1,039 |
Options granted (in shares) | 122,000 |  |
Weighted average grant date fair value of options granted (in dollars per share) | $ 24.87 | $ 19.36 |
Total intrinsic value of options exercised | $ 5,400 | $ 1,600 |
Unrecognized compensation expense | $ 1,800 |  |
Restricted stock awards granted (in shares) | 225,000 | 79,000 |
Share price (in dollars per share) | $ 0.02 | $ 0.02 |
Weighted average grant date fair value (in dollars per share) | $ 24.77 | $ 17.08 |
Shares released (in shares) | 13,000 | 31,000 |
Restricted Stock |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |
Total stock-based compensation expense | $ 2,200 | $ 700 |
Restricted stock awards cancelled (in shares) | 53,000 | 13,000 |
Restricted Stock | Minimum |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |
Vesting period | 1 year |  |
Restricted Stock | Maximum |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |
Vesting period | 3 years |  |
Performance Shares |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |
Restricted stock awards cancelled (in shares) | 38,000 | 12,000 |
Performance Shares | Minimum |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |
Vesting period | 1 year |  |
Performance Shares | Maximum |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |
Vesting period | 3 years |  |
Equity Incentive Plan 2015 |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |
Number of shares authorized under plan approved by directors (in shares) | 2,000,000.0 |  |
Equity Incentive Plan 2015 | Employee Stock Options |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |
Expiration period | 10 years |  |
Equity Incentive Plan 2015 | Employee Stock Options | Minimum |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |
Vesting period | 1 year |  |
Equity Incentive Plan 2015 | Employee Stock Options | Maximum |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |
Vesting period | 3 years |  |
Equity Incentive Plan 2005 |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |
Number of shares authorized under plan approved by directors (in shares) | 2,250,000.00 |  |
Options granted (in shares) |  |  | 0
Equity Incentive Plan 2005 | Restricted Stock |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |
Restricted stock awards granted (in shares) |  | 0 | 0
Equity Incentive Plan 2005 | Employee Stock Options |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |
Expiration period | 10 years |  |
Equity Incentive Plan 2005 | Employee Stock Options | Minimum |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |
Vesting period | 1 year |  |
Equity Incentive Plan 2005 | Employee Stock Options | Maximum |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |
Vesting period | 3 years |  |

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- Definition The weighted average fair value at grant date for nonvested equity-based awards issued during the period on other than stock (or unit) option plans (for example, phantom stock or unit plan, stock or unit appreciation rights plan, performance target plan). + 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 (c)(2)(iii)(1) -URI http://asc.fasb.org/extlink&oid=116856206&loc=d3e5070-113901 + Details
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