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Equity-Based Compensation (Tables) | 12 Months Ended
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Dec. 31, 2022
Disclosure Of Compensation Related Costs Sharebased Payments [Abstract] |
Stock Option Activity | Stock option activity during 2020, 2021 and 2022 was as follows (aggregate intrinsic value in thousands):
|  | Number of Options |  |  | Weighted Average Exercise Price |  |  | Weighted Average Remaining Contractual Term (in years) |  |  | Aggregate Intrinsic Value |
Options outstanding at January 1, 2020 |  |  | 1,360,068 |  |  | $ | 39.40 |  |  |  |  |  |  |  |  |
Options granted |  |  | 507,600 |  |  |  | 33.13 |  |  |  |  |  |  |  |  |
Options exercised |  |  | (68,700 | ) |  |  | 29.15 |  |  |  |  |  |  |  |  |
Options cancelled |  |  | (288,662 | ) |  |  | 39.67 |  |  |  |  |  |  |  |  |
Options outstanding at December 31, 2020 |  |  | 1,510,306 |  |  |  | 37.56 |  |  |  |  |  |  |  |  |
Options granted |  |  | 324,320 |  |  |  | 57.53 |  |  |  |  |  |  |  |  |
Options exercised |  |  | (558,322 | ) |  |  | 39.45 |  |  |  |  |  |  |  |  |
Options cancelled |  |  | (170,235 | ) |  |  | 40.08 |  |  |  |  |  |  |  |  |
Options outstanding at December 31, 2021 |  |  | 1,106,069 |  |  |  | 42.07 |  |  |  |  |  |  |  |  |
Options granted |  |  | 334,260 |  |  |  | 55.73 |  |  |  |  |  |  |  |  |
Options exercised |  |  | (285,577 | ) |  |  | 40.66 |  |  |  |  |  |  |  |  |
Options cancelled |  |  | (175,475 | ) |  |  | 46.98 |  |  |  |  |  |  |  |  |
Options outstanding at December 31, 2022 |  |  | 979,277 |  |  | $ | 46.27 |  |  |  | 7.44 |  |  | $ | 35,303 |
Options exercisable at December 31, 2022 |  |  | 301,827 |  |  | $ | 41.43 |  |  |  | 5.69 |  |  | $ | 12,341 |
Schedule of Stock Options Valuation Assumptions | The following table summarizes the grant-date fair value of options and the assumptions used to develop the fair value estimates for options granted during the years ended December 31, 2022, 2021 and 2020:
|  | Year Ended December 31, |
|  | 2022 |  |  | 2021 |  |  | 2020 |
Weighted average grant-date fair value of options |  | $ | 20.72 |  |  | $ | 20.64 |  |  | $ | 12.37 |
Risk-free interest rate |  |  | 2.0 | % |  |  | 0.9 | % |  |  | 1.6 | %
Expected volatility |  |  | 39 | % |  |  | 40 | % |  |  | 41 | %
Expected life (in years) |  |  | 5.0 |  |  |  | 5.0 |  |  |  | 5.0 |
Restricted Stock Activity | Restricted stock activity during 2020, 2021 and 2022 was as follows:
|  | Number of Shares |  |  | Weighted Average Grant-Date Fair Value |
Unvested at January 1, 2020 |  |  | 805,136 |  |  | $ | 34.14 |
Granted |  |  | 637,312 |  |  |  | 25.82 |
Cancelled |  |  | (129,683 | ) |  |  | 34.56 |
Vested |  |  | (289,769 | ) |  |  | 35.88 |
Unvested at December 31, 2020 |  |  | 1,022,996 |  |  | $ | 28.41 |
Granted |  |  | 352,430 |  |  |  | 58.32 |
Cancelled |  |  | (82,751 | ) |  |  | 39.63 |
Vested |  |  | (366,048 | ) |  |  | 30.81 |
Unvested at December 31, 2021 |  |  | 926,627 |  |  | $ | 37.84 |
Granted |  |  | 650,396 |  |  |  | 64.65 |
Cancelled |  |  | (145,205 | ) |  |  | 49.03 |
Vested |  |  | (386,616 | ) |  |  | 32.64 |
Unvested at December 31, 2022 |  |  | 1,045,202 |  |  | $ | 54.89 |
Restricted Stock Unit Activity | Restricted stock unit activity during 2020, 2021 and 2022 was as follows:
|  | Number of Units |  |  | Weighted Average Grant-Date Fair Value |
Unvested at January 1, 2020 |  |  | 447,357 |  |  | $ | 38.89 |
Granted |  |  | 583,680 |  |  |  | 10.60 |
Performance adjustment |  |  | 117,772 |  |  |  | 13.50 |
Cancelled |  |  | (63,056 | ) |  |  | 43.35 |
Vested |  |  | (12,691 | ) |  |  | 42.09 |
Unvested at December 31, 2020 |  |  | 1,073,062 |  |  | $ | 20.15 |
Granted |  |  | 149,416 |  |  |  | 61.52 |
Performance adjustment |  |  | 465,993 |  |  |  | 25.49 |
Cancelled |  |  | — |  |  |  | — |
Vested |  |  | (184,051 | ) |  |  | 42.30 |
Unvested at December 31, 2021 |  |  | 1,504,420 |  |  | $ | 23.20 |
Granted |  |  | 105,311 |  |  |  | 73.96 |
Performance adjustment |  |  | 182,543 |  |  |  | 33.05 |
Cancelled |  |  | — |  |  |  | — |
Vested |  |  | (518,474 | ) |  |  | 43.16 |
Unvested at December 31, 2022 |  |  | 1,273,800 |  |  | $ | 20.69 |

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- Definition Tabular disclosure of the significant assumptions used during the year to estimate the fair value of stock options, including, but not limited to: (a) expected term of share options and similar instruments, (b) expected volatility of the entity's shares, (c) expected dividends, (d) risk-free rate(s), and (e) discount for post-vesting restrictions. + 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 (f)(2) -URI https://asc.fasb.org/extlink&oid=128089324&loc=d3e5070-113901 + Details
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