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STOCKHOLDERS' EQUITY - Summary of Restricted Stock, Restricted Stock Unit and Performance-based Stock Unit Activity (Detail) $ / shares in Units, shares in Thousands, $ in Thousands | 6 Months Ended
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Jun. 30, 2019 USD ($) $ / shares shares
Restricted Stock, Restricted Stock Units, and Performance-Based Stock Units |
Restricted Stock, Restricted Stock Units, and Performance Stock Units |
Outstanding at beginning of period (in shares) | 686
Granted (in shares) | 161
Forfeited (in shares) | (4)
Outstanding at end of period (in shares) | 627
Weighted Average Grant Date Fair Value |
Outstanding at beginning of period (in dollars per share) | $ / shares | $ 15.56
Granted (in dollars per share) | $ / shares | 37.02
Forfeited (in dollars per share) | $ / shares | 17.75
Outstanding at end of period (in dollars per share) | $ / shares | $ 18.68
Weighted Average Remaining Contractual Term (in years) and Aggregate Intrinsic Value |
Weighted Average Remaining Contractual Term, Outstanding | 1 year
Aggregate Intrinsic Value, Outstanding at end of period | $ | $ 10,854
Restricted Stock, Restricted Stock Units, and Performance-Based Stock Units | Class A Common Stock |
Restricted Stock, Restricted Stock Units, and Performance Stock Units |
Class A Common Stock Vested (in shares) | (216)
Weighted Average Grant Date Fair Value |
Class A Common Stock Vested (in dollars per share) | $ / shares | $ 12.13
Performance-Based Stock Units |
Weighted Average Remaining Contractual Term (in years) and Aggregate Intrinsic Value |
Performance-based stock units, percentage of attainment level | 100.00%
Performance-Based Stock Units | Class A Common Stock |
Weighted Average Remaining Contractual Term (in years) and Aggregate Intrinsic Value |
Number of performance-based stock units (in shares) | 325
Unvested | Restricted Stock, Restricted Stock Units, and Performance-Based Stock Units |
Restricted Stock, Restricted Stock Units, and Performance Stock Units |
Outstanding at end of period (in shares) | 952
Weighted Average Grant Date Fair Value |
Outstanding at end of period (in dollars per share) | $ / shares | $ 19.48
Weighted Average Remaining Contractual Term (in years) and Aggregate Intrinsic Value |
Weighted Average Remaining Contractual Term, Outstanding | 1 year 1 month 6 days
Aggregate Intrinsic Value, Outstanding at end of period | $ | $ 16,909

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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://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (c)(1)(iv)(3) -URI http://asc.fasb.org/extlink&oid=116856206&loc=d3e5070-113901 + Details
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- Definition Weighted average fair value as of the grant date of equity-based award plans other than stock (unit) option plans that were not exercised or put into effect as a result of the occurrence of a terminating event. + 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 (c)(2)(iii)(3) -URI http://asc.fasb.org/extlink&oid=116856206&loc=d3e5070-113901 + Details
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- Definition Weighted average remaining contractual term for equity-based awards excluding options, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days. + 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 (e)(1) -URI http://asc.fasb.org/extlink&oid=116856206&loc=d3e5070-113901 + Details
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- Definition The weighted average fair value as of grant date pertaining to an equity-based award plan other than a stock (or unit) option plan for which the grantee gained the right during the reporting period, by satisfying service and performance requirements, to receive or retain shares or units, other instruments, or cash in accordance with the terms of the arrangement. + 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 (c)(2)(iii)(2) -URI http://asc.fasb.org/extlink&oid=116856206&loc=d3e5070-113901 + Details
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