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Condensed Consolidated Statements of Comprehensive (Loss) Income - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2018	Jun. 30, 2017	Jun. 30, 2018	Jun. 30, 2017
Condensed Consolidated Statements of Comprehensive (Loss) Income [Abstract]
Net (loss) income	$ (2,336)	$ (448)	$ (8,740)	$ 190
Other comprehensive income:
Pension liability adjustments, net of tax	89	76	177	153
Postretirement liability adjustments, net of tax	(53)	(49)	(105)	(98)
Other comprehensive income	36	27	72	55
Comprehensive (loss) income	$ (2,300)	$ (421)	$ (8,668)	$ 245

X

- Definition

The adjustment out of other comprehensive income for prior service costs recognized as a component of net period benefit cost during the period, after tax. Also includes actuarial gains/losses recognized out of OCI in addition to prior service costs. This is the portion attributable to the pension liability.

+ References

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- Definition

The adjustment out of other comprehensive income for prior service costs recognized as a component of net period benefit cost during the period, after tax. Also includes actuarial gains/losses recognized out of OCI in addition to prior service costs. This is the portion attributable to the postretirement benefits liability.

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- Definition

Amount after tax of increase (decrease) in equity from transactions and other events and circumstances from net income and other comprehensive income, attributable to parent entity. Excludes changes in equity resulting from investments by owners and distributions to owners.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 220
-SubTopic 10
-Section 45
-Paragraph 5
-URI http://asc.fasb.org/extlink&oid=84228862&loc=d3e557-108580

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- Definition

The portion of profit or loss for the period, net of income taxes, which is attributable to the parent.

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-Topic 230
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Amount after tax and reclassification adjustments of other comprehensive income (loss).

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