Commitments and Contingencies (Narrative) (Details)	12 Months Ended
Dec. 31, 2016 USD ($) yr
Inventories [Member]
Loss Contingencies [Line Items]
Outstanding inventory purchase obligations \| $	$ 202,391,000
Minimum [Member]
Loss Contingencies [Line Items]
Operating leases, base lease term	5
Maximum [Member]
Loss Contingencies [Line Items]
Operating leases, base lease term	10

Amount of the unrecorded obligation to transfer funds in the future for fixed or minimum amounts or quantities of goods or services at fixed or minimum prices (for example, as in take-or-pay contracts or throughput contracts).

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 440
-SubTopic 10
-Section 50
-Paragraph 4
-Subparagraph (b)
-URI http://asc.fasb.org/extlink&oid=73718637&loc=d3e25336-109308

Name:	us-gaap_UnrecordedUnconditionalPurchaseObligationBalanceSheetAmount
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant