XML 108 R72.htm IDEA: XBRL DOCUMENT v3.3.1.900

Other assets - Deferred lease inducements asset (Details) - CAD CAD in Thousands	12 Months Ended
	Dec. 31, 2015	Dec. 31, 2014
Deferred Lease Inducements Asset [Roll Forward]
Balance, beginning of year	CAD 1,212	CAD 0
Additions	0	1,307
Amortization of deferred lease inducements	(142)	(95)
Balance, end of year	CAD 1,070	CAD 1,212

X

- Definition

Amortization on Lease Incentive Receivable

+ References

No definition available.

+ Details

Name:	noa_AmortizationonLeaseIncentiveReceivable
Namespace Prefix:	noa_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	duration

X

- Definition

Deferred Lease Inducements Asset [Roll Forward]

+ References

No definition available.

+ Details

Name:	noa_DeferredLeaseInducementsAssetRollForward
Namespace Prefix:	noa_
Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration

X

- Definition

Lease Incentive Receivable, Additions

+ References

No definition available.

+ Details

Name:	noa_LeaseIncentiveReceivableAdditions
Namespace Prefix:	noa_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration

X

- Definition

This item represents a receivable for an incentive or inducement contractually stipulated between parties to a lease whereby the lessor has committed to provide the entity (lessee) with a cash payment as inducement to enter the lease.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 840
-SubTopic 20
-Section 25
-Paragraph 2
-URI http://asc.fasb.org/extlink&oid=7501430&loc=d3e39927-112707

Reference 2: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 810
-SubTopic 20
-Section 25
-Paragraph 6
-URI http://asc.fasb.org/extlink&oid=7501307&loc=d3e89293-111693

Reference 3: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 810
-SubTopic 20
-Section 25
-Paragraph 7
-URI http://asc.fasb.org/extlink&oid=7501307&loc=d3e89298-111693

+ Details

Name:	us-gaap_LeaseIncentiveReceivable
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant