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STOCK-BASED COMPENSATION Performance-based Awards and Restricted Stock Units (Details) $ / shares in Units, $ in Thousands | 3 Months Ended
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Mar. 31, 2019 USD ($) $ / shares shares
Performance Based Awards (PSUs) |
Shares |
Outstanding at January 1, 2019 | 26,000
Granted | 58,000
Vested | (26,000)
Forfeited | 0
Outstanding at March 31, 2019 | 58,000
Outstanding and expected to vest at March 31, 2019 | 38,000
Weighted- Average Grant Date Fair Value Per Share (in dollars per share) |
Outstanding at January 1, 2019 | $ / shares | $ 62.87
Granted | $ / shares | 69.46
Vested | $ / shares | 62.87
Forfeited | $ / shares | 0.00
Outstanding at March 31, 2019 | $ / shares | $ 69.46
Weighted-Average Remaining Contractual Term (In years) |
Outstanding at March 31, 2019 | 9 months
Outstanding and expected to vest at March 31, 2019 | 9 months
Aggregate Intrinsic Value (In thousands) |
Outstanding at March 31, 2019 | $ | $ 4,043
Outstanding and expected to vest at March 31, 2019 | $ | $ 2,648
Long-Term Performance-Based Awards (PRSUs) |
Shares |
Outstanding at January 1, 2019 | 213,000
Granted | 72,000
Vested | (70,000)
Forfeited | 0
Outstanding at March 31, 2019 | 215,000
Outstanding and expected to vest at March 31, 2019 | 93,000
Weighted- Average Grant Date Fair Value Per Share (in dollars per share) |
Outstanding at January 1, 2019 | $ / shares | $ 55.48
Granted | $ / shares | 68.17
Vested | $ / shares | 43.26
Forfeited | $ / shares | 0.00
Outstanding at March 31, 2019 | $ / shares | $ 63.70
Weighted-Average Remaining Contractual Term (In years) |
Outstanding at March 31, 2019 | 1 year 9 months
Outstanding and expected to vest at March 31, 2019 | 2 years 4 months 27 days
Aggregate Intrinsic Value (In thousands) |
Outstanding at March 31, 2019 | $ | $ 15,023
Outstanding and expected to vest at March 31, 2019 | $ | $ 6,534
Restricted Stock Units (RSUs) |
Shares |
Outstanding at January 1, 2019 | 895,000
Granted | 119,000
Vested | (112,000)
Forfeited | (4,000)
Outstanding at March 31, 2019 | 898,000
Outstanding and expected to vest at March 31, 2019 | 827,000
Weighted- Average Grant Date Fair Value Per Share (in dollars per share) |
Outstanding at January 1, 2019 | $ / shares | $ 58.19
Granted | $ / shares | 67.51
Vested | $ / shares | 54.38
Forfeited | $ / shares | 56.81
Outstanding at March 31, 2019 | $ / shares | $ 59.91
Weighted-Average Remaining Contractual Term (In years) |
Outstanding at March 31, 2019 | 2 years 2 months 12 days
Outstanding and expected to vest at March 31, 2019 | 1 year 8 months 15 days
Aggregate Intrinsic Value (In thousands) |
Outstanding at March 31, 2019 | $ | $ 62,796
Outstanding and expected to vest at March 31, 2019 | $ | $ 57,871
Minimum [Member] | Performance Based Awards (PSUs) |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |
Number of Performance Based Awards Shares Released As Percentage Of Target Number | 0.00%
Minimum [Member] | Long-Term Performance-Based Awards (PRSUs) |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |
Number of Performance Based Awards Shares Released As Percentage Of Target Number | 0.00%
Maximum [Member] | Performance Based Awards (PSUs) |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |
Number of Performance Based Awards Shares Released As Percentage Of Target Number | 200.00%
Maximum [Member] | Long-Term Performance-Based Awards (PRSUs) |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |
Number of Performance Based Awards Shares Released As Percentage Of Target Number | 200.00%

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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=109197908&loc=d3e5070-113901 + Details
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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://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)(1) -URI http://asc.fasb.org/extlink&oid=109197908&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=109197908&loc=d3e5070-113901 + Details
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