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Stock-Based Compensation (Tables) | 9 Months Ended
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Sep. 30, 2019
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |
Schedule of Nonvested Restricted Stock Units Activity |
| Shares subject to restriction (thousands) |  | Weighted average grant date fair value
Nonvested at December 31, 2018 | 1,516 |  |  | $ | 42.97 |
Granted | 930 |  |  | $ | 41.92 |
Vested | (665 | ) |  | $ | 35.94 |
Forfeited | (6 | ) |  | $ | 45.41 |
Nonvested at March 31, 2019 | 1,775 |  |  | $ | 44.77 |
Granted | 125 |  |  | $ | 40.78 |
Vested | (28 | ) |  | $ | 50.43 |
Forfeited | (37 | ) |  | $ | 45.13 |
Nonvested at June 30, 2019 | 1,835 |  |  | $ | 44.40 |
Granted | 22 |  |  | $ | 36.68 |
Vested | (7 | ) |  | $ | 43.81 |
Forfeited | (30 | ) |  | $ | 44.99 |
Nonvested at September 30, 2019 | 1,820 |  |  | $ | 44.29 |
Schedule of Share-based Compensation, Performance Shares Award Unvested Activity |
| Number of shares (thousands) |  | Weighted average grant date fair value
Nonvested at December 31, 2018 | 297 |  |  | $ | 47.03 |
Granted | 190 |  |  | $ | 41.90 |
Forfeited | (9 | ) |  | $ | 44.12 |
Nonvested at March 31, 2019 | 478 |  |  | $ | 45.04 |
Granted | 5 |  |  | $ | 41.92 |
Forfeited | (56 | ) |  | $ | 44.24 |
Nonvested at June 30, 2019 | 427 |  |  | $ | 45.11 |
Forfeited | (5 | ) |  | $ | 44.76 |
Nonvested at September 30, 2019 | 422 |  |  | $ | 45.11 |
| Number of shares (thousands) |  | Weighted average grant date fair value
Nonvested at December 31, 2018 | 297 |  |  | $ | 60.35 |
Granted | 190 |  |  | $ | 51.52 |
Forfeited | (9 | ) |  | $ | 55.30 |
Nonvested at March 31, 2019 | 478 |  |  | $ | 56.93 |
Granted | 5 |  |  | $ | 51.59 |
Forfeited | (56 | ) |  | $ | 55.67 |
Nonvested at June 30, 2019 | 427 |  |  | $ | 57.03 |
Forfeited | (5 | ) |  | $ | 57.29 |
Nonvested at September 30, 2019 | 422 |  |  | $ | 57.03 |

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- Definition Tabular disclosure of the changes in outstanding nonvested restricted stock units. + 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) -URI http://asc.fasb.org/extlink&oid=116856206&loc=d3e5070-113901 + Details
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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. + Details
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- Definition Tabular disclosure of number and weighted-average grant date fair value for nonvested performance shares. + 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) -URI http://asc.fasb.org/extlink&oid=116856206&loc=d3e5070-113901 + Details
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