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Revenue Impact of ASC 606 in Current Period Income Statement (Details) - USD ($) | 3 Months Ended
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Mar. 31, 2018 | Mar. 31, 2017
Revenue, Initial Application Period Cumulative Effect Transition [Line Items] |  |
Revenues | $ 372,033,000 | $ 247,739,000
Decrease in Revenue | (2,012,000) |
COST OF GOODS SOLD | 223,032,000 | 158,794,000
Increase (Decrease) Cost of Goods Sold | 21,000 |
Gross Profit | 149,001,000 | $ 88,945,000
Decrease in Gross Profit | (2,033,000) |
Calculated under Revenue Guidance in Effect before Topic 606 [Member] |  |
Revenue, Initial Application Period Cumulative Effect Transition [Line Items] |  |
Revenues | 374,045,000 |
COST OF GOODS SOLD | 223,011,000 |
Gross Profit | $ 151,034,000 |

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- Definition Total costs related to goods produced and sold during the reporting period. + 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 210.5-03.2(a)) -URI http://asc.fasb.org/extlink&oid=63488584&loc=d3e20235-122688 + Details
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- Definition Aggregate revenue less cost of goods and services sold or operating expenses directly attributable to the revenue generation activity. + 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 210.5-03.1,2) -URI http://asc.fasb.org/extlink&oid=63488584&loc=d3e20235-122688 + Details
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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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