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Income Taxes (Summary of Income Tax Contingencies) (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
Income Taxes [Abstract]
Balance as of January 1	$ 3,449	$ 3,481	$ 3,645
Tax positions related to the current year:
Additions
Tax positions related to prior years:
Reductions		(32)	(165)
Expiration of statutes of limitation			1
Balance as of December 31	$ 3,449	$ 3,449	$ 3,481

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Amount of unrecognized tax benefits.

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Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
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-SubTopic 10
-Section 45
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Amount of decrease in unrecognized tax benefits resulting from tax positions taken in prior period tax returns.

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Amount of increase in unrecognized tax benefits resulting from tax positions that have been or will be taken in current period tax return.

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