Supplemental Cash Flow Information (Details) - USD ($) $ in Thousands	6 Months Ended
Jun. 30, 2018	Jun. 30, 2017
Other Changes in Certain Working Capital Accounts, Net
Accounts receivable	$ (5,363)	$ (9,086)
Other current assets	(5,040)	(8,939)
Accounts payable	8,836	(3,905)
Accrued employee compensation and benefits	(4,812)	(3,406)
Other accrued liabilities	(4,484)	6,764
Other, net	788	(1,575)
Total	$ (10,075)	$ (20,147)

Other changes in certain working capital accounts net.

No definition available.

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- Definition

The increase (decrease) during the reporting period of the sum of amounts due within one year (or one business cycle) from customers for the credit sale of goods and services; and from note holders for outstanding loans.

+ 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

+ Details

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- Definition

The increase (decrease) during the reporting period in the aggregate amount of liabilities incurred (and for which invoices have typically been received) and payable to vendors for goods and services received that are used in an entity's business.

+ References

+ Details

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- Definition

The increase (decrease) during the reporting period in the aggregate amount of obligations related to services received from employees, such as accrued salaries and bonuses, payroll taxes and fringe benefits.

+ References

+ Details

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- Definition

The increase (decrease) during the reporting period of all assets and liabilities used in operating activities.

+ References

+ Details

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- Definition

The increase (decrease) during the reporting period in other expenses incurred but not yet paid.

+ References

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- Definition

Amount of increase (decrease) in current assets classified as other.

+ References

No definition available.

+ Details

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- Definition

Amount of increase (decrease) in operating assets after deduction of operating liabilities classified as other.

+ References

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