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Retirement Plans - Schedule of Costs of Retirement Plans (Details) - USD ($) $ in Thousands | 3 Months Ended | 6 Months Ended
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Jun. 30, 2021 | Jun. 30, 2020 | Jun. 30, 2021 | Jun. 30, 2020
Defined Contribution Plan Disclosure |  |  |  |
Expenses associated with contributions made | $ 583 | $ 564 | $ 1,113 | $ 574
United States |  |  |  |
Defined Contribution Plan Disclosure |  |  |  |
Expenses associated with contributions made | 408 | 433 | 772 | 295
Canada |  |  |  |
Defined Contribution Plan Disclosure |  |  |  |
Expenses associated with contributions made | 40 | 30 | 86 | 69
United Kingdom |  |  |  |
Defined Contribution Plan Disclosure |  |  |  |
Expenses associated with contributions made | $ 135 | $ 101 | $ 255 | $ 210

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- Definition Amount of cost for defined contribution plan. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 715 -SubTopic 70 -Section 50 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=49170846&loc=d3e28014-114942 + Details
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- Definition Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table. + References No definition available. + Details
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- Details
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- Details
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