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Legal Proceedings (Details) - USD ($) $ in Thousands | Dec. 31, 2017 | Dec. 31, 2016
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Legal Proceedings |  |
Operating Leases, Future Minimum Payments Due, Next Twelve Months | $ 882 |
Operating Leases, Future Minimum Payments, Due in Two Years | 724 |
Operating Leases, Future Minimum Payments, Due in Three Years | 708 |
Operating Leases, Future Minimum Payments, Due in Four Years | 718 |
Operating Leases, Future Minimum Payments, Due in Five Years | 733 |
Operating Leases, Future Minimum Payments, Due Thereafter | 62,788 |
Loss contingency accrual, at carrying value | 32,100 | $ 42,100
Operating Leases, Future Minimum Payments Due | $ 66,553 |

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- Definition Amount of loss contingency liability. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 450 -SubTopic 20 -Section 50 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=82911808&loc=d3e14326-108349 + Details
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- Definition Amount of required minimum rental payments for leases having an initial or remaining non-cancelable letter-terms in excess of one year. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 840 -SubTopic 10 -Section 55 -Paragraph 40 -Subparagraph (Note 3) -URI http://asc.fasb.org/extlink&oid=82846649&loc=d3e38371-112697 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 840 -SubTopic 20 -Section 50 -Paragraph 2 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=77902758&loc=d3e41502-112717 + Details
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