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Equity Incentive Awards (Tables) | 12 Months Ended
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Dec. 31, 2020
Equity Incentive Awards [Abstract] |
Schedule of Share-based Compensation, Stock Options, Activity |
|  | 2020 |  | 2019 |  | 2018
(in thousands, except exercise price data) |  | Options |  | Weighted Average Exercise Price |  | Options |  | Weighted Average Exercise Price |  | Options |  | Weighted Average Exercise Price
Outstanding at beginning of year |  | 7,695 |  |  | $ | 8.95 |  |  | 6,152 |  |  | $ | 10.68 |  |  | 4,961 |  |  | $ | 11.17 |
Granted |  | 3,495 |  |  | 3.24 |  |  | 2,435 |  |  | 5.06 |  |  | 1,916 |  |  | 10.00 |
Exercised |  | — |  |  | — |  |  | — |  |  | — |  |  | (97) |  |  | 7.55 |
Expired |  | (236) |  |  | 12.91 |  |  | (212) |  |  | 9.95 |  |  | (239) |  |  | 14.21 |
Forfeited |  | (2,557) |  |  | 6.78 |  |  | (680) |  |  | 10.42 |  |  | (389) |  |  | 12.04 |
Outstanding at end of year |  | 8,397 |  |  | 7.12 |  |  | 7,695 |  |  | 8.95 |  |  | 6,152 |  |  | 10.68 |
Exercisable at end of year |  | 4,684 |  |  | $ | 9.48 |  |  | 4,275 |  |  | $ | 10.56 |  |  | 3,620 |  |  | $ | 10.72 |
Schedule of Nonvested Restricted Stock Units Activity |
|  | Shares |  | Weighted Average Grant Date Fair Value
|  | (in thousands) |  |
Outstanding at December 31, 2019 |  | 2,830 |  |  | $ | 6.35 |
Granted |  | 3,144 |  |  | 3.27 |
Vested |  | (1,219) |  |  | 6.56 |
Forfeited |  | (1,986) |  |  | 4.13 |
Outstanding at December 31, 2020 |  | 2,769 |  |  | $ | 4.35 |

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- Definition Equity Incentive Awards [Abstract] + References No definition available. + Details
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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=120381028&loc=d3e5070-113901 + Details
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- Definition Tabular disclosure for stock option plans. Includes, but is not limited to, outstanding awards at beginning and end of year, grants, exercises, forfeitures, and weighted-average grant date fair value. + 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 (d) -URI http://asc.fasb.org/extlink&oid=120381028&loc=d3e5070-113901 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (e) -URI http://asc.fasb.org/extlink&oid=120381028&loc=d3e5070-113901 Reference 3: 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=120381028&loc=d3e5070-113901 + Details
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