Income Taxes (Schedule Of Uncertain Tax Position Liability And Liability For Interest And Penalties On Uncertain Tax Positions) (Details) - USD ($) $ in Thousands	12 Months Ended
Dec. 31, 2016	Dec. 31, 2015	Dec. 31, 2014
Income Taxes [Abstract]
Beginning balance	$ 969	$ 1,437	$ 2,100
Increases related to current year tax positions	86	103	92
Increases related to prior year tax positions	2,668	403
Decreases related to prior year tax positions	(40)	(70)	(265)
Decreases related to settlements	(66)
Decreases due to the lapsing of statutes of limitations	(227)	(904)	(490)
Ending balance	3,390	969	1,437
Beginning Balance	210	366	422
Accrual of interest and penalties	92	50	91
Decreases related to prior year tax positions	(94)	(206)	(147)
Ending Balance	$ 208	$ 210	$ 366

Unrecognized Tax Benefits, Income Tax Penalties and Interest Decreases Related to Prior Year Tax Positions

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- Definition

Unrecognized Tax Benefits, Income Tax Penalties and Interest Increase During Period

+ References

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Amount of unrecognized tax benefits.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 740
-SubTopic 10
-Section 50
-Paragraph 15A
-Subparagraph (a)
-URI http://asc.fasb.org/extlink&oid=65882285&loc=SL6600010-109319

Reference 2: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Glossary Unrecognized Tax Benefit
-URI http://asc.fasb.org/extlink&oid=6527854

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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 decrease in unrecognized tax benefits resulting from settlements with taxing authorities.

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- Definition

Amount accrued for interest on an underpayment of income taxes and penalties related to a tax position claimed or expected to be claimed in the tax return.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 740
-SubTopic 10
-Section 50
-Paragraph 15
-Subparagraph (c)
-URI http://asc.fasb.org/extlink&oid=65882285&loc=d3e32718-109319

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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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Amount of increase in unrecognized tax benefits resulting from tax positions taken in prior period tax returns.

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Amount of decrease in unrecognized tax benefits resulting from lapses of applicable statutes of limitations.

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