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Equity Incentive Plans (Tables) | 12 Months Ended
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Dec. 31, 2019
Share-based Payment Arrangement [Abstract] |
Share-based Payment Arrangement, Nonvested Award, Cost [Table Text Block] | As of December 31, 2019, unrecognized compensation expense related to unvested RSUs and PSUs is expected to be recognized as follows (in thousands):
2020 | $ | 16,776 |
2021 | 10,863 |
2022 | 6,054 |
2023 | 2,641 |
2024 | 182 |
Total unrecognized compensation expense | $ | 36,516 |
Schedule of Nonvested Restricted Stock Units Activity | The following table summarizes activity related to our RSUs under the Equity Incentive Plan for the year ended December 31, 2019:
| Number Outstanding |  | Weighted Average Grant Date Fair Value |  | Weighted Average Remaining Contractual Term (in years) |  | Aggregate Intrinsic Value (in thousands) (1)
Unvested as of January 1, 2019 | 1,475,682 |  |  | $ | 34.94 |  |  |  |  |
Granted (2) | 1,021,535 |  |  | $ | 27.82 |  |  |  |  |
Vested | (796,936 | ) |  | $ | 32.50 |  |  |  |  |
Forfeited / Canceled | (88,255 | ) |  | $ | 33.38 |  |  |  |  |
Unvested as of December 31, 2019 | 1,612,026 |  |  | $ | 31.72 |  |  |  |  |
Expected to vest after December 31, 2019 | 1,458,089 |  |  | $ | 31.75 |  |  | 2.5 |  | $ | 52,054 |
Schedule of Share-based Compensation, Stock Options, Activity | The following table summarizes activity related to our stock options under the Equity Incentive Plan for the year ended December 31, 2019:
| Number Outstanding |  | Weighted Average Exercise Price |  | Weighted Average Remaining Contractual Term (in years) |  | Aggregate Intrinsic Value (in thousands) (1)
Balance as of January 1, 2019 | 1,051,494 |  |  | $ | 10.15 |  |  |  |  |
Exercised | (926,809 | ) |  | $ | 9.77 |  |  |  |  | $ | 19,725 |
Canceled | (10,091 | ) |  | $ | 21.25 |  |  |  |  |
Balance as of December 31, 2019 | 114,594 |  |  | $ | 12.26 |  |  | 0.1 |  | $ | 2,686 |
Exercisable as of December 31, 2019 | 114,594 |  |  | $ | 12.26 |  |  | 0.1 |  | $ | 2,686 |

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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 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=116856206&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=116856206&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=116856206&loc=d3e5070-113901 + Details
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- Definition Tabular disclosure of cost not yet recognized and weighted-average period over which cost is expected to be recognized for nonvested award under share-based payment arrangement. + 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 (i) -URI http://asc.fasb.org/extlink&oid=116856206&loc=d3e5070-113901 + Details
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