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SEGMENT INFORMATION (Assets by segment) (Details) - USD ($) $ in Thousands	Dec. 31, 2016	Oct. 01, 2016
Segment assets:
Total assets	$ 992,760	$ 982,444
Equipment [Member]
Segment assets:
Total assets	912,389	901,316
Expendable Tools [Member]
Segment assets:
Total assets	$ 80,371	$ 81,128

X

- Definition

-- None. No documentation exists for this element. --

+ References

No definition available.

+ Details

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- Definition

Sum of the carrying amounts as of the balance sheet date of all assets that are recognized. Assets are probable future economic benefits obtained or controlled by an entity as a result of past transactions or events.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 944
-SubTopic 210
-Section S99
-Paragraph 1
-Subparagraph (SX 210.7-03(a)(12))
-URI http://asc.fasb.org/extlink&oid=6879938&loc=d3e572229-122910

Reference 2: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 942
-SubTopic 210
-Section S99
-Paragraph 1
-Subparagraph (SX 210.9-03(11))
-URI http://asc.fasb.org/extlink&oid=6876686&loc=d3e534808-122878

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Period Type:	instant

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- Details

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Namespace Prefix:
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- Details

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