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Equity-based Compensation (Tables)

12 Months Ended

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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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

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-Publisher FASB
-Name Accounting Standards Codification
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-Publisher FASB
-Name Accounting Standards Codification
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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.

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-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

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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.

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