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Income Taxes (Summary of Income Tax Contingencies) (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
Income Taxes [Abstract]
Balance as of January 1	$ 3,645	$ 3,839	$ 4,304
Tax positions related to the current year:
Additions		31	208
Tax positions related to prior years:
Reductions	(165)	(176)	(61)
Expiration of statutes of limitation, increase	1
Expiration of statutes of limitation		(49)	(612)
Balance as of December 31	$ 3,481	$ 3,645	$ 3,839

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Amount of unrecognized tax benefits.

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Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
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-SubTopic 10
-Section 50
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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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