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Indebtedness (Future Maturities On Debt And Capital Lease Obligations) (Details) - USD ($) $ in Thousands | Dec. 31, 2017 | Dec. 31, 2016
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Indebtedness [Abstract] |  |
2018 | $ 1,468 |
2019 | 3,755 |
2020 | 8,305 |
2021 | 8,309 |
2022 | 8,335 |
2023 and thereafter | 14,379 |
Total payments | 44,551 |
Imputed interest | (7,129) |
Net long-term debt and capital lease obligations, of which $561 is current and $36,861 is noncurrent | 37,422 |
Net capital lease obligations, current | 561 | $ 1,688
Net capital lease obligations, noncurrent | $ 36,861 |

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- Definition Amount necessary to reduce net minimum lease payments to present value for capital leases. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 840 -SubTopic 30 -Section 50 -Paragraph 1 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=84164817&loc=d3e45280-112737 + Details
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- Definition Amount of long-term debt and capital lease obligation due after one year or beyond the normal operating cycle, if longer. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02(22)) -URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682 + Details
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- Definition Amount of long-term debt and capital leases due within one year or the normal operating cycle, if longer. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02.20) -URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682 + Details
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