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Summary of Significant Accounting Policies (Tables) | 12 Months Ended
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Dec. 31, 2019
Summary of Significant Accounting Policies |
Schedule of estimated useful lives of the related assets |
Asset Classification |  | Estimated Useful Life
Land, buildings and equipment (under lease) |  |  | Lesser of the lease term or estimated useful life of the asset |  |
Machinery and equipment |  |  | 3 to 10 years |  |
Schedule of components of net income per share |
|  | Year ended December 31, |
|  | 2019 |  | 2018 |  | 2017 |
|  | (in thousands, except per share data) |
Net income available to common stockholders |  | $ | 17,034 |  | $ | 45,885 |  | $ | 126,959 |
Weighted average common shares outstanding used in computing basic income per share |  |  | 32,559 |  |  | 32,286 |  |  | 30,866 |
Incremental options and RSUs |  |  | 1,269 |  |  | 1,716 |  |  | 2,570 |
Weighted average common shares used in computing diluted net income per share |  |  | 33,828 |  |  | 34,002 |  |  | 33,436 |
Net income per share |  |  |  |  |  |  |  |  |  |
Basic |  | $ | 0.52 |  | $ | 1.42 |  | $ | 4.11 |
Diluted |  | $ | 0.50 |  | $ | 1.35 |  | $ | 3.80 |
Schedule of changes in accumulated other comprehensive income, net of tax |
|  | Foreign |  | Defined benefit |  |  |  |
|  | currency |  | pension plan |  | Total |
|  | (in thousands) |
Balance at December 31, 2018 |  | $ | 962 |  | $ | (514) |  | $ | 448 |
Other comprehensive loss and pension reclassification |  |  | (444) |  |  | (262) |  |  | (706) |
Balance at December 31, 2019 |  | $ | 518 |  | $ | (776) |  | $ | (258) |

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- Definition Tabular disclosure of the components of accumulated other comprehensive income (loss). + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 220 -SubTopic 10 -Section 45 -Paragraph 14A -URI http://asc.fasb.org/extlink&oid=114867106&loc=SL7669686-108580 + Details
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- Definition Tabular disclosure of an entity's basic and diluted earnings per share calculations, including a reconciliation of numerators and denominators of the basic and diluted per-share computations for income from continuing operations. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 260 -SubTopic 10 -Section 50 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=6371337&loc=d3e3550-109257 + Details
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