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Equity-based Compensation (Tables) | 12 Months Ended
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Dec. 31, 2019
Disclosure Of Compensation Related Costs Sharebased Payments [Abstract] |
Summary of Weighted Average Valuation Assumptions of Grants | The weighted average assumptions for the grants in the years ended December 31, 2019, 2018 and 2017 are provided in the following table:
|  | December 31, |
|  | 2019 |  |  | 2018 |  |  | 2017 |
Valuation assumptions: |  |  |  |  |  |  |  |  |  |  |  |
Expected dividend yield |  |  | — | % |  |  | — | % |  |  | — | %
Expected volatility |  |  | 37.3 | % |  |  | 43.4 | % |  |  | 40.2 | %
Expected term (years) |  |  | 6.5 |  |  |  | 6.5 |  |  |  | 6.5 |
Risk-free interest rate |  |  | 2.4 | % |  |  | 2.6 | % |  |  | 1.9 | %
Summary of Equity Option Activity | Option activity under the 2013 Plan is as follows:
|  | Number of Shares |  |  | Weighted Average Exercise Price |  |  | Weighted Average Remaining Contractual Term |  |  | Aggregate Intrinsic Value (000's) |
Balance at January 1, 2019 |  |  | 5,139,304 |  |  | $ | 6.22 |  |  |  | 7.1 |  |  | $ | 48,416 |
Granted |  |  | 67,232 |  |  |  | 15.62 |  |  |  | 9.3 |  |  |  |  |
Exercised |  |  | (208,578 | ) |  |  | 3.60 |  |  |  |  |  |  |  |  |
Forfeited |  |  | (79,619 | ) |  |  | 15.62 |  |  |  |  |  |  |  |  |
Expired |  |  | (2,265 | ) |  |  | 15.62 |  |  |  |  |  |  |  |  |
Balance at December 31, 2019 |  |  | 4,916,074 |  |  |  | 6.30 |  |  |  | 5.6 |  |  |  | 59,368 |
Exercisable at December 31, 2019 |  |  | 3,521,797 |  |  |  | 4.26 |  |  |  | 4.7 |  |  |  | 49,705 |
Vested and expected to vest |  |  | 4,805,523 |  |  |  | 6.30 |  |  |  | 5.5 |  |  |  | 58,001 |
Summary of RSU Award Activity | RSU award activity under the 2019 Plan is as follows:
|  | Class A Common Stock |  |  | Weighted Average Grant Date Fair Value |  |  | Weighted Average Remaining Contractual Term |  |  | Aggregate Intrinsic Value (000's) |
Unvested at January 1, 2019 |  |  | — |  |  | $ | — |  |  |  | — |  |  | $ | — |
Granted |  |  | 13,130 |  |  |  | 19.04 |  |  |  | 3.6 |  |  |  | — |
Vested |  |  | — |  |  |  | — |  |  |  |  |  |  |  |  |
Forfeited |  |  | — |  |  |  | — |  |  |  |  |  |  |  |  |
Unvested at December 31, 2019 |  |  | 13,130 |  |  |  | 19.04 |  |  |  | 3.6 |  |  |  | 242 |

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- Definition Tabular disclosure for stock option plans. Includes, but is not limited to, outstanding awards at beginning and end of year, grants, exercises, forfeitures, and weighted-average grant date fair value. + 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 (d) -URI http://asc.fasb.org/extlink&oid=116856206&loc=d3e5070-113901 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (e) -URI http://asc.fasb.org/extlink&oid=116856206&loc=d3e5070-113901 Reference 3: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (c)(1) -URI http://asc.fasb.org/extlink&oid=116856206&loc=d3e5070-113901 + Details
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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 http://asc.fasb.org/extlink&oid=116856206&loc=d3e5070-113901 + Details
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- Definition Disclosure of the number and weighted-average grant date fair value for restricted stock and restricted stock units that were outstanding at the beginning and end of the year, and the number of restricted stock and restricted stock units that were granted, vested, or forfeited during the year. + References No definition available. + Details
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