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Correction of Accounting Error in Prior Period - (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
Error Corrections and Prior Period Adjustments Restatement
Provision for excess and obsolete inventory	$ 2,205	$ 8,135	$ 1,051
Change in inventories	10,512	10,567	6,572
Net cash provided by (used in) operating activities	$ 46,965	56,284	$ (8,788)
Previously Reported
Error Corrections and Prior Period Adjustments Restatement
Provision for excess and obsolete inventory		(8,135)
Change in inventories		5,703
Net cash provided by (used in) operating activities		56,284
Adjusted
Error Corrections and Prior Period Adjustments Restatement
Provision for excess and obsolete inventory		8,135
Change in inventories		(10,567)
Net cash provided by (used in) operating activities		56,284
Total Adjustment
Error Corrections and Prior Period Adjustments Restatement
Provision for excess and obsolete inventory		16,270
Change in inventories		$ (16,270)

X

- Definition

Amount of provision related to write-down of excess and obsolete inventory.

+ References

No definition available.

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- Definition

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+ References

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- Definition

The increase (decrease) during the reporting period in the aggregate value of all inventory held by the reporting entity, associated with underlying transactions that are classified as operating activities.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 230
-SubTopic 10
-Section 45
-Paragraph 28
-Subparagraph (a)
-URI http://asc.fasb.org/extlink&oid=98514028&loc=d3e3602-108585

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- Definition

Amount of cash inflow (outflow) from operating activities, including discontinued operations. Operating activity cash flows include transactions, adjustments, and changes in value not defined as investing or financing activities.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 230
-SubTopic 10
-Section 45
-Paragraph 24
-URI http://asc.fasb.org/extlink&oid=98514028&loc=d3e3521-108585

Reference 2: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 230
-SubTopic 10
-Section 45
-Paragraph 28
-URI http://asc.fasb.org/extlink&oid=98514028&loc=d3e3602-108585

Reference 3: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 230
-SubTopic 10
-Section 45
-Paragraph 25
-URI http://asc.fasb.org/extlink&oid=98514028&loc=d3e3536-108585

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