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Income Taxes (Details 5) - Tax Valuation Allowance - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Changes in valuation and qualifying accounts
Balance at beginning of period	$ 174,119	$ 196,098	$ 173,878
Charged (credited) to operations	32,544	(21,294)	22,220
Charged to other account	211	3	0
Valuation allowance release	0	(688)	0
Balance at end of period	$ 206,874	$ 174,119	$ 196,098

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- Definition

A roll forward is a reconciliation of a concept from the beginning of a period to the end of a period.

+ References

No definition available.

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- Definition

Amount of valuation and qualifying accounts and reserves.

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 235
-SubTopic 10
-Section S99
-Paragraph 4
-Subparagraph (SX 210.12-09(Column B))
-URI http://asc.fasb.org/extlink&oid=120395691&loc=d3e24092-122690

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-Publisher FASB
-Name Accounting Standards Codification
-Topic 235
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Amount of increase in valuation and qualifying accounts and reserves from charge to cost and expense.

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-Publisher FASB
-Name Accounting Standards Codification
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-SubTopic 10
-Section S99
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-Subparagraph (SX 210.12-09(Column C)(1))
-URI http://asc.fasb.org/extlink&oid=120395691&loc=d3e24092-122690

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Amount of increase in valuation and qualifying accounts and reserves from charge to accounts other than cost and expense.

+ References

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-Topic 235
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Amount of decrease in valuation and qualifying accounts and reserves.

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-Topic 235
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