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Stock-Based Compensation - Fair Value Assumptions (Details) $ / shares in Units, shares in Thousands, $ in Millions | 12 Months Ended
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Dec. 31, 2022 USD ($) item $ / shares shares | Dec. 31, 2021 USD ($) $ / shares shares | Dec. 31, 2020 USD ($) $ / shares
Additional information |  |  |
Stock-based compensation expense | $ 10.5 | $ 10.6 | $ 6.9
Stock Options |  |  |
Additional information |  |  |
Vesting period | 3 years |  |
Restricted Stock and Restricted Stock Units |  |  |
Other information |  |  |
Compensation expense yet to be recognized | $ 2.1 |  |
Weighted-average period over which compensation cost will be recognized | 2 years 3 months 18 days |  |
Shares |  |  |
Unvested at beginning of year (in shares) | shares | 115 |  |
Granted (in shares) | shares | 69 |  |
Vested (in shares) | shares | (75) |  |
Forfeited (in shares) | shares | (5) |  |
Unvested at end of year (in shares) | shares | 104 | 115 |
Weighted Average Grant Date Fair Value |  |  |
Unvested at beginning of year (in dollars per share) | $ / shares | $ 57.74 |  |
Granted (in dollars per share) | $ / shares | 90.17 | $ 76.73 | $ 39.03
Vested (in dollars per share) | $ / shares | 61.68 |  |
Forfeited (in dollars per share) | $ / shares | 56.77 |  |
Unvested at end of year (in dollars per share) | $ / shares | $ 76.39 | 57.74 |
Additional information |  |  |
Fair value of shares vested | $ 4.6 |  |
Weighted-average fair value (in dollars per share) | $ / shares | $ 90.17 | $ 76.73 | $ 39.03
Aggregate intrinsic value of restricted stock vested | $ 6.6 | $ 5.5 | $ 2.9
Performance Stock Units |  |  |
Other information |  |  |
Compensation expense yet to be recognized | $ 1.4 |  |
Weighted-average period over which compensation cost will be recognized | 1 year 4 months 24 days |  |
Additional information |  |  |
Vesting period | 3 years |  |
Types of performance units | item | 2 |  |
Percentage of units measured on stock price relative to peer group | 50.00% |  |
Percentage of units measured on stock price based on pre determined EPS | 50.00% |  |
Period for which shareholder return is compared with peer group for units determined by EPS performance | 3 years |  |
Calculated fair market value | $ 12.2 |  |
Value of PSUs granted | 4.5 |  |
Stock-based compensation expense | $ 5.3 | $ 5.7 | $ 2.7
Performance Stock Units | Minimum |  |  |
Additional information |  |  |
Performance measures for dollar denominated award granted | 0 |  |
Performance Stock Units | Maximum |  |  |
Additional information |  |  |
Performance measures for dollar denominated award granted | 2.0 |  |

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- Definition The number of equity-based payment instruments, excluding stock (or unit) options, that were forfeited during the reporting period. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (c)(2)(iii)(03) -URI https://asc.fasb.org/extlink&oid=128089324&loc=d3e5070-113901 + Details
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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://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (c)(2)(iii)(01) -URI https://asc.fasb.org/extlink&oid=128089324&loc=d3e5070-113901 + Details
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- Definition Per share or unit weighted-average fair value of nonvested award under share-based payment arrangement. Excludes share and unit options. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (c)(2)(i) -URI https://asc.fasb.org/extlink&oid=128089324&loc=d3e5070-113901 Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (c)(2)(ii) -URI https://asc.fasb.org/extlink&oid=128089324&loc=d3e5070-113901 + Details
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