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Business Segment, Geographic and Major Customer Information - Geographic Information (Details) - USD ($) $ in Thousands | 3 Months Ended
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Mar. 31, 2016 | Mar. 31, 2015
Revenues from External Customers and Long-Lived Assets [Line Items] |  |
Revenue | $ 72,289 | $ 82,373
U.S. [Member] |  |
Revenues from External Customers and Long-Lived Assets [Line Items] |  |
Revenue | 57,793 | 64,195
Other countries [Member] |  |
Revenues from External Customers and Long-Lived Assets [Line Items] |  |
Revenue | $ 14,496 | $ 18,178

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- Definition Amount of revenue recognized from goods sold, services rendered, insurance premiums, or other activities that constitute an earning process. Includes, but is not limited to, investment and interest income before deduction of interest expense when recognized as a component of revenue, and sales and trading gain (loss). + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 225 -SubTopic 10 -Section S99 -Paragraph 2 -Subparagraph (SX 210.5-03.1) -URI http://asc.fasb.org/extlink&oid=63488584&loc=d3e20235-122688 + Details
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- Details
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