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Stock-Based Compensation (Tables) | 6 Months Ended
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Jun. 30, 2020
Share-based Payment Arrangement, Noncash Expense [Abstract] |
Share-based Compensation Arrangements by Share-based Payment Award, Options, Vested and Expected to Vest, Outstanding [Table Text Block] | Stock-based compensation expense consisted of the following:
|  | Three Months Ended June 30, |  |  |  | Six Months Ended June 30, |  |
(in thousands) |  | 2020 |  | 2019 |  | 2020 |  | 2019
Stock options |  | $ | 1,755 |  |  | $ | 1,602 |  |  | $ | 3,459 |  |  | $ | 3,091 |
Restricted stock units |  | 2,282 |  |  | 2,964 |  |  | 4,253 |  |  | 5,690 |
Total |  | $ | 4,037 |  |  | $ | 4,566 |  |  | $ | 7,712 |  |  | $ | 8,781 |

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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 options that are fully vested and expected to vest. Includes, but is not limited to, unvested options 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=116856206&loc=d3e5070-113901 + Details
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- References No definition available. + Details
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