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Income Taxes (Reconciliation of Unrecognized Tax Benefit Accounts) (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
Income Taxes [Abstract]
Unrecognized tax benefit, Beginning balance	$ 20,447	$ 18,786	$ 16,785
Decrease in balance related to tax positions taken in prior year
Increase in balance related to tax positions taken during current year	1,532	1,661	2,001
Unrecognized tax benefit, Ending balance	$ 21,979	$ 20,447	$ 18,786

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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
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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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