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Summary of Significant Accounting Policies, Inventories (Details) - USD ($) $ in Thousands | 3 Months Ended | 12 Months Ended
--- | --- | ---
Sep. 30, 2015 | Dec. 31, 2016 | Dec. 31, 2015 | Dec. 31, 2014
Inventories [Abstract] |  |  |  |
Write-down of estimated surplus inventory | $ 37,900 |  |  |
Raw materials |  | $ 108,276 | $ 114,193 |
Finished goods |  | 141,660 | 151,063 |
Inventories |  | 249,936 | 265,256 |
Inventory Valuation Reserve [Member] |  |  |  |
Valuation Allowance [Roll Forward] |  |  |  |
Beginning balance, adjustments to inventory carrying value |  | 20,744 | 56,034 | $ 5,934
Additions |  | 24,906 | 38,605 | 77,379
Write-offs |  | (37,655) | (73,895) | (27,279)
Ending balance, adjustments to inventory carrying value |  | $ 7,995 | $ 20,744 | $ 56,034

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- Definition Amount before valuation and LIFO reserves of completed merchandise or goods expected to be sold within one year or operating cycle, if longer. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02.6(a)(1)) -URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682 + Details
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