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Gain on Sale of Building (Details) - USD ($) $ in Thousands | 12 Months Ended
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Dec. 31, 2017 | Dec. 31, 2016 | Dec. 31, 2015
Gain on Sale of Building [Abstract] |  |  |
Selling price of building |  |  | $ 3,600
Net Book Value of Building |  |  | 2,500
Gain (Loss) on Disposition of Assets | $ 0 | $ 0 | $ 1,086

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- Definition Gain on Sale of Building [Abstract] + References No definition available. + Details
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- Definition Net Book Value of Building + References No definition available. + Details
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- Definition Selling price of building + References No definition available. + Details
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- Definition Amount of gain (loss) on sale or disposal of assets, including but not limited to property plant and equipment, intangible assets and equity in securities of subsidiaries or equity method investee. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 360 -SubTopic 10 -Section 45 -Paragraph 5 -URI http://asc.fasb.org/extlink&oid=68055307&loc=d3e2443-110228 + Details
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