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Income Taxes (Schedule Of Changes In Unrecognized Tax Benefits) (Details) - USD ($) $ in Thousands | 12 Months Ended
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Dec. 31, 2016 | Dec. 31, 2015 | Dec. 31, 2014
Income Taxes [Abstract] |  |  |
Total amounts of unrecognized tax benefits, beginning of period | $ 7,204 | $ 5,942 | $ 6,325
Gross increases in unrecognized tax benefits as a result of tax positions taken during a prior period | 75 | 47 | 432
Gross increases in unrecognized tax benefits as a result of tax positions taken in the current period | 12,657 | 1,569 | 1,789
Decreases in unrecognized tax benefits relating to settlements with taxing authorities | (1,326) |  | (2,242)
Decreases in unrecognized tax benefits as a result of a lapse of the applicable statutes of limitations | (147) | (354) | (362)
Total amounts of unrecognized tax benefits, end of period | $ 18,463 | $ 7,204 | $ 5,942

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- Definition 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 + Details
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- Definition Amount of increase in unrecognized tax benefits resulting from tax positions that have been or will be taken in current period 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 15A -Subparagraph (a)(2) -URI http://asc.fasb.org/extlink&oid=65882285&loc=SL6600010-109319 + Details
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