v3.7.0.1

Condensed Consolidating Financial Information - Guarantor Subsidiaries - Condensed Consolidated Statements of Comprehensive Income (Loss) (Detail) - USD ($) $ in Thousands		3 Months Ended
		Mar. 31, 2017	Mar. 31, 2016
Condensed Financial Statements, Captions [Line Items]
Net (loss) earnings		$ (15,248)	$ (8,932)
Unrealized gain (loss) on short-term investments		162	807
Changes in pension plan asset and benefit obligation		(1)	1
Tax effect of preceding gains, losses or changes		(58)	(332)
Total Comprehensive (loss) income		(15,145)	(8,456)
Parent Company Only (issuer) [Member]
Condensed Financial Statements, Captions [Line Items]
Net (loss) earnings		(15,248)	(8,932)
Unrealized gain (loss) on short-term investments		162	807
Changes in pension plan asset and benefit obligation		(1)	1
Tax effect of preceding gains, losses or changes		(58)	(332)
Total Comprehensive (loss) income		(15,145)	(8,456)
Guarantor Subsidiaries [Member]
Condensed Financial Statements, Captions [Line Items]
Net (loss) earnings	[1]	2,631	5,054
Total Comprehensive (loss) income	[1]	2,631	5,054
Eliminations [Member]
Condensed Financial Statements, Captions [Line Items]
Net (loss) earnings		(2,631)	(5,054)
Total Comprehensive (loss) income		$ (2,631)	$ (5,054)
[1] Foreign subsidiaries represent minor subsidiaries and are included in the guarantor subsidiaries' amounts.

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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
-Glossary Other Comprehensive Income
-URI http://asc.fasb.org/extlink&oid=51831270

Reference 2: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
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-URI http://asc.fasb.org/extlink&oid=51831223

Reference 3: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
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Reference 4: http://www.xbrl.org/2003/role/presentationRef
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The portion of profit or loss for the period, net of income taxes, which is attributable to the parent.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
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-URI http://asc.fasb.org/extlink&oid=51831255

Reference 2: http://www.xbrl.org/2003/role/presentationRef
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Amount before tax, after reclassification adjustments, of (increase) decrease in accumulated other comprehensive (income) loss related to pension and other postretirement defined benefit plans.

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Amount of tax expense (benefit) allocated to other comprehensive income (loss).

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