XML 124 R88.htm IDEA: XBRL DOCUMENT v3.3.1.900

Shares - Dividends (Details) - CAD / shares	Dec. 11, 2015	Oct. 23, 2015	Jul. 24, 2015	Apr. 24, 2015	Jan. 23, 2015	Dec. 31, 2015	Dec. 31, 2014	Feb. 19, 2014	Dec. 31, 2013
Equity [Abstract]
Annual aggregate dividend (in CAD per share)						CAD 0.08	CAD 0.08	CAD 0.08	CAD 0.00
Dividends paid (CAD per share)	CAD 0.02	CAD 0.02	CAD 0.02	CAD 0.02	CAD 0.02

X

- Definition

Dividends Payable, Annual Aggregate Dividend

+ References

No definition available.

+ Details

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Namespace Prefix:	noa_
Data Type:	num:perShareItemType
Balance Type:	na
Period Type:	instant

X

- Definition

Aggregate dividends paid during the period for each share of common stock outstanding.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 505
-SubTopic 10
-Section S99
-Paragraph 1
-Subparagraph (SX 210.3-04)
-URI http://asc.fasb.org/extlink&oid=27012166&loc=d3e187085-122770

+ Details

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Namespace Prefix:	us-gaap_
Data Type:	num:perShareItemType
Balance Type:	na
Period Type:	duration

X

- References

No definition available.

+ Details

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Namespace Prefix:	us-gaap_
Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration