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Financial Statement Information Schedule of Inventory (Details) - USD ($) $ in Thousands	3 Months Ended	12 Months Ended
	Mar. 31, 2018	Dec. 31, 2017
Product Information
Inventories	$ 2,401,309	$ 2,380,783
Aftermarket and refurbished products
Product Information
Inventories	1,915,537	1,877,653
Salvage and remanufactured products
Product Information
Inventories	469,648	487,108
ManufacturedProducts [Member]
Product Information
Inventories	16,124	16,022
Raw Materials [Member]
Product Information
Manufactured Inventory	9,000	10,000
Work In Process [Member]
Product Information
Manufactured Inventory	2,000	2,000
Finished goods Inventory [Member]
Product Information
Manufactured Inventory	$ 5,000	$ 4,000

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Manufactured Inventory

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- Definition

Amount after valuation and LIFO reserves of inventory expected to be sold, or consumed 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))
-URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682

Reference 2: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 330
-SubTopic 10
-Section 35
-Paragraph 2
-URI http://asc.fasb.org/extlink&oid=68049868&loc=d3e3927-108312

Reference 3: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 210
-SubTopic 10
-Section 45
-Paragraph 1
-Subparagraph (b)
-URI http://asc.fasb.org/extlink&oid=28358313&loc=d3e6676-107765

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