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Income Taxes - Reconciliation of Beginning and Ending Amount of Unrecognized Tax Benefits (Details) - USD ($) $ in Thousands | 12 Months Ended
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Dec. 31, 2021 | Dec. 31, 2020 | Dec. 31, 2019
Reconciliation of Unrecognized Tax Benefits |  |  |
Balance of unrecognized tax benefits at beginning of year | $ 24,310 | $ 29,000 | $ 28,406
Increases for tax positions of prior years | 1,533 | 4,219 | 2,784
Decreases for tax positions of prior years | (65) | 0 | (96)
Increases for tax positions established for the current period | 2,272 | 3,912 | 2,542
Decreases for settlements with taxing authorities | (620) | (285) | (220)
Reductions resulting from lapse of applicable statute of limitation | (2,876) | (12,630) | (4,462)
Adjustment resulting from foreign currency translation | (44) | 94 | 46
Balance of unrecognized tax benefits at end of year | $ 24,510 | $ 24,310 | $ 29,000

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- Definition Amount of unrecognized tax benefits. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 740 -SubTopic 10 -Section 45 -Paragraph 10B -URI http://asc.fasb.org/extlink&oid=123427490&loc=SL37586934-109318 Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 740 -SubTopic 10 -Section 50 -Paragraph 15A -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=121826272&loc=SL6600010-109319 + Details
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- Definition Amount of decrease in unrecognized tax benefits resulting from settlements with taxing authorities. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 740 -SubTopic 10 -Section 50 -Paragraph 15A -Subparagraph (a)(3) -URI http://asc.fasb.org/extlink&oid=121826272&loc=SL6600010-109319 + Details
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