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Share-Based Compensation (Tables) | 12 Months Ended
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Dec. 31, 2018
Disclosure of Compensation Related Costs, Share-based Payments [Abstract] |
Restricted Stock Units Activity | RSU activity is presented below (number of RSUs in thousands):
| Years ended December 31,
| 2018 |  | 2017 |  | 2016
| Number of RSUs |  | Weighted Average Grant-date Fair Value |  | Number of RSUs |  | Weighted Average Grant-date Fair Value |  | Number of RSUs |  | Weighted Average Grant-date Fair Value
Outstanding: |  |  |  |  |  |  |  |  |  |  |
Beginning of year | 417 |  |  | $ | 14.57 |  |  | 377 |  |  | $ | 14.04 |  |  | 278 |  |  | $ | 15.04 |
Granted | 74 |  |  | 28.20 |  |  | 98 |  |  | 16.75 |  |  | 129 |  |  | 11.69 |
Vested | (86 | ) |  | 16.75 |  |  | (58 | ) |  | 14.78 |  |  | (30 | ) |  | 13.15 |
Forfeited | (140 | ) |  | 14.70 |  |  | — |  |  | — |  |  | — |  |  | — |
End of year | 265 |  |  | $ | 17.64 |  |  | 417 |  |  | $ | 14.57 |  |  | 377 |  |  | $ | 14.04 |
Restricted Stock Units Performance-based Vesting Criteria | RSUs with performance-based vesting criteria are expected to vest as follows (number of RSUs in thousands):
Vesting Date |  | Expected to Vest |  | Not Expected to Vest |  | Total
January 1, 2019 |  | 33 |  |  | 51 |  |  | 84 |
January 1, 2020 |  | 55 |  |  | 3 |  |  | 58 |
January 1, 2021 |  | 47 |  |  | 2 |  |  | 49 |
Pre-tax Share-based Compensation Expense Recognized | The following table summarizes pre-tax share-based compensation expense recognized (in thousands):
| Years ended December 31,
| 2018 |  | 2017 |  | 2016
Restricted stock units | $ | 1,799 |  |  | $ | 1,499 |  |  | $ | 37 |

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- Definition Tabular disclosure of the amount of total share-based compensation cost, including the amounts attributable to each share-based compensation plan and any related tax benefits. + 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 (h)(1) -URI http://asc.fasb.org/extlink&oid=109197908&loc=d3e5070-113901 + Details
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- Definition Tabular disclosure of number, weighted-average exercise price or conversion ratio, aggregate intrinsic value, and weighted-average remaining contractual term for outstanding performance-based awards that are fully vested and expected to vest. Includes, but is not limited to, unvested awards for which requisite service period has not been rendered but that are expected to vest based on achievement of performance condition, if forfeitures are recognized when they occur. + 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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- Definition Tabular disclosure of the number and weighted-average grant date fair value for restricted stock units that were outstanding at the beginning and end of the year, and the number of restricted stock units that were granted, vested, or forfeited during the year. + 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) -URI http://asc.fasb.org/extlink&oid=109197908&loc=d3e5070-113901 + Details
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