Share-Based Compensation Arrangement By Share-based Payment Award, Purchase Period

No definition available.

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- Definition

Represents the expense recognized during the period arising from equity-based compensation arrangements (for example, shares of stock, unit, stock options or other equity instruments) with employees, directors and certain consultants qualifying for treatment as employees.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 718
-SubTopic 10
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- Definition

Aggregate number of common shares reserved for future issuance.

+ References

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-Publisher FASB
-Name Accounting Standards Codification
-Topic 210
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- Definition

Maximum term of the deferred compensation arrangement, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
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- Definition

Unrecognized cost of unvested share-based compensation awards.

+ References

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-Publisher FASB
-Name Accounting Standards Codification
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- Definition

Weighted average period over which unrecognized compensation is expected to be recognized for equity-based compensation plans, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days.

+ References

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- Definition

Unrecognized cost of unvested share-based awards, other than options, awarded to employees as compensation.

+ References

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- Definition

Unrecognized cost of unvested options awarded to employees as compensation.

+ References

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- Definition

The aggregate total costs related to selling a firm's product and services, as well as all other general and administrative expenses. Direct selling expenses (for example, credit, warranty, and advertising) are expenses that can be directly linked to the sale of specific products. Indirect selling expenses are expenses that cannot be directly linked to the sale of specific products, for example telephone expenses, Internet, and postal charges. General and administrative expenses include salaries of non-sales personnel, rent, utilities, communication, etc.

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- Definition

Period which an employee's right to exercise an award is no longer contingent on satisfaction of either a service condition, market condition or a performance condition, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
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- Definition

The number of grants made 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

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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/presentationRef
-Publisher FASB
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- Definition

The weighted average fair value of nonvested awards on equity-based plans excluding option plans (for example, phantom stock or unit plan, stock or unit appreciation rights plan, revenue or profit achievement stock award plan) for which the employer is contingently obligated to issue equity instruments or transfer assets to an employee who has not yet satisfied service or performance criteria necessary to gain title to proceeds from the sale of the award or underlying shares or units.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
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- Definition

The number of equity-based payment instruments, excluding stock (or unit) options, that vested during the reporting period.

+ References

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-Publisher FASB
-Name Accounting Standards Codification
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- Definition

Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

+ References

No definition available.

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- Definition

The highest percentage of annual salary that an employee is permitted to utilize with respect to the plan.

+ References

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-Publisher FASB
-Name Accounting Standards Codification
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- Definition

The maximum number of shares (or other type of equity) originally approved (usually by shareholders and board of directors), net of any subsequent amendments and adjustments, for awards under the equity-based compensation plan. As stock or unit options and equity instruments other than options are awarded to participants, the shares or units remain authorized and become reserved for issuance under outstanding awards (not necessarily vested).

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
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-SubTopic 10
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- Definition

The weighted average grant-date fair value of options granted during the reporting period as calculated by applying the disclosed option pricing methodology.

+ References

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-Publisher FASB
-Name Accounting Standards Codification
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- Definition

Number of share instruments newly issued under a share-based compensation plan.

+ References

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- Definition

Percentage of vesting of share-based compensation awards.

+ References

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-Publisher FASB
-Name Accounting Standards Codification
-Topic 718
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- Definition

Purchase price of common stock expressed as a percentage of its fair value.

+ References

No definition available.

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Equity-based compensation - Additional Information (Detail) - USD ($) $ / shares in Units, $ in Thousands	1 Months Ended	12 Months Ended
	Aug. 31, 2015	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Share based compensation, compensation expense		$ 21	$ 152	$ 784
Stock options, expected recognition, weighted-average period (in years)		2 years 24 days
Weighted-average grant date fair value of stock options granted (in usd per share)		$ 13.49
Selling, general and administrative		$ 72,446	60,369	$ 50,008
Total Unrecognized compensation expense related to unvested stock options.		$ 3,228
Stock Options
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Stock options, expected recognition, weighted-average period (in years)		1 year 11 months 25 days
Selling, general and administrative		$ 3,316	$ 2,195
Restricted Stock Units
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Share based compensation, weighted-average grant date fair value (in usd per share)		$ 39.82	$ 23.26
Share based compensation, vested (in shares)		24,053
Selling, general and administrative		$ 1,637	$ 184
Share based compensation, shares granted (in shares)		94,177
Weighted-average grant date fair value of restricted stock granted (in usd per share)		$ 39.71
Unrecognized compensation expense related to unvested RSUs, including an estimate for pre-vesting forfeitures		$ 2,155
ESPP
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Share based compensation, compensation expense		$ 129
Payroll deduction for ESPP, percent		10.00%
ESPP offering period		6 months
ESPP purchase discount, percent		85.00%
Number of shares of common stock authorized and available for issuance under the ESPP (in shares)		1,000,000
Class B Common Stock
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Share based compensation, shares issued (in shares)			4,238,338
Share based compensation, weighted-average grant date fair value (in usd per share)			$ 1.52
Holdings Units
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Share based compensation, compensation expense			$ 337
Share based compensation, vested (in shares)			22,527
Class A Common Stock \| Restricted Stock Units
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Share based compensation, shares granted (in shares)		94,177
2013 Equity Incentive Plan
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Share based compensation, total unrecognized compensation		$ 3
Stock options, expected recognition, weighted-average period (in years)		11 months
2013 Equity Incentive Plan \| Class M Units
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Share based compensation, vest equally over a period (in years)		5 years
Contractual term in years of stock option awards (in years)		10 years
2013 Equity Incentive Plan \| Class M Units \| Tranche One
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Award vesting rights, percentage		80.00%
2013 Equity Incentive Plan \| Class M Units \| IPO \| Tranche One
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Award vesting rights, percentage		20.00%
2015 Omnibus Incentive Plan \| Maximum
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Share based compensation, vest equally over a period (in years)	10 years
Share based compensation, options granted to employees, directors and officers (in shares)	7,896,800
2015 Omnibus Incentive Plan \| Minimum
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Share based compensation, vest equally over a period (in years)		4 years