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Marketable Securities (Summary of Investment Securities in an Unrealized Loss Position) (Details) $ in Thousands | 12 Months Ended
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Dec. 31, 2015 USD ($)
Investments, Debt and Equity Securities [Abstract] |
Unrealized Losses, Less than 12 months | $ (138)
Unrealized Losses, 12 months or more | (207)
Unrealized Losses, Total | (345)
Fair value, Less than 12 months | 12,789
Fair value, 12 months or more | 20,004
Fair value, Total | $ 32,793

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- Definition Amount of unrealized loss on investments in held-to-maturity securities that have been in a loss position for twelve months or longer. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 320 -SubTopic 10 -Section 50 -Paragraph 7 -URI http://asc.fasb.org/extlink&oid=27724398&loc=d3e27337-111563 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 320 -SubTopic 10 -Section 50 -Paragraph 6 -Subparagraph (a)(2) -URI http://asc.fasb.org/extlink&oid=27724398&loc=d3e27290-111563 + Details
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