XML 99 R85.htm IDEA: XBRL DOCUMENT v2.4.1.9

Interest expense (Details) (CAD) In Thousands, unless otherwise specified	12 Months Ended
	Dec. 31, 2014	Dec. 31, 2013
Schedule of Interest Expense [Line Items]
Amortization of deferred financing costs	1,594us-gaap_AmortizationOfFinancingCosts	4,326us-gaap_AmortizationOfFinancingCosts
Interest on long term debt	12,133us-gaap_InterestExpenseDebt	21,973us-gaap_InterestExpenseDebt
Other interest expense (income)	102us-gaap_InterestIncomeExpenseNonoperatingNet	(276)us-gaap_InterestIncomeExpenseNonoperatingNet
Total interest expense, net	12,235us-gaap_InterestExpense	21,697us-gaap_InterestExpense
Capital lease obligations
Schedule of Interest Expense [Line Items]
Interest on long term debt	3,103us-gaap_InterestExpenseDebtExcludingAmortization / us-gaap_LongtermDebtTypeAxis = us-gaap_CapitalLeaseObligationsMember	2,716us-gaap_InterestExpenseDebtExcludingAmortization / us-gaap_LongtermDebtTypeAxis = us-gaap_CapitalLeaseObligationsMember
Credit Facility
Schedule of Interest Expense [Line Items]
Interest on long term debt	1,268us-gaap_InterestExpenseDebtExcludingAmortization / us-gaap_LongtermDebtTypeAxis = us-gaap_LineOfCreditMember	2,424us-gaap_InterestExpenseDebtExcludingAmortization / us-gaap_LongtermDebtTypeAxis = us-gaap_LineOfCreditMember
Corporate debentures | Series 1 Debentures
Schedule of Interest Expense [Line Items]
Interest on long term debt	6,168us-gaap_InterestExpenseDebtExcludingAmortization / us-gaap_DebtInstrumentAxis = noa_Series1DebenturesMember / us-gaap_LongtermDebtTypeAxis = us-gaap_CorporateDebtSecuritiesMember	12,507us-gaap_InterestExpenseDebtExcludingAmortization / us-gaap_DebtInstrumentAxis = noa_Series1DebenturesMember / us-gaap_LongtermDebtTypeAxis = us-gaap_CorporateDebtSecuritiesMember

X

- Details

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

X

- Definition

Amount of noncash expense included in interest expense to issue debt and obtain financing associated with the related debt instruments. Alternate captions include noncash interest expense.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 230

-SubTopic 10

-Section 45

-Paragraph 28

-URI http://asc.fasb.org/extlink&oid=31042434&loc=d3e3602-108585



Reference 2: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 225

-SubTopic 10

-Section S99

-Paragraph 2

-Subparagraph (SX 210.5-03.8)

-URI http://asc.fasb.org/extlink&oid=26872669&loc=d3e20235-122688



Reference 3: http://www.xbrl.org/2003/role/presentationRef

-Publisher SEC

-Name Regulation S-X (SX)

-Number 210

-Section 03

-Paragraph 8

-Article 5



Reference 4: http://www.xbrl.org/2003/role/presentationRef

-Publisher SEC

-Name Regulation S-X (SX)

-Number 210

-Section 04

-Paragraph 8

-Article 9

+ Details

Name:	us-gaap_AmortizationOfFinancingCosts
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration

X

- Definition

Amount of the cost of borrowed funds accounted for as interest expense.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 835

-SubTopic 20

-Section 50

-Paragraph 1

-URI http://asc.fasb.org/extlink&oid=6450988&loc=d3e26243-108391



Reference 2: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 942

-SubTopic 225

-Section S99

-Paragraph 1

-Subparagraph (SX 210.9-04.9)

-URI http://asc.fasb.org/extlink&oid=6879574&loc=d3e536633-122882



Reference 3: http://www.xbrl.org/2003/role/presentationRef

-Publisher SEC

-Name Regulation S-X (SX)

-Number 210

-Section 04

-Paragraph 9

-Article 9

+ Details

Name:	us-gaap_InterestExpense
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration

X

- Definition

Amount of the cost of borrowed funds accounted for as interest expense for debt.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 225

-SubTopic 10

-Section S99

-Paragraph 2

-Subparagraph (SX 210.5-03.8)

-URI http://asc.fasb.org/extlink&oid=26872669&loc=d3e20235-122688



Reference 2: http://www.xbrl.org/2003/role/presentationRef

-Publisher SEC

-Name Regulation S-X (SX)

-Number 210

-Section 03

-Paragraph 8

-Article 5

+ Details

Name:	us-gaap_InterestExpenseDebt
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration

X

- Definition

Represents the portion of interest incurred in the period on debt arrangements that was charged against earnings, excluding amortization of debt discount (premium) and financing costs.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher SEC

-Name Regulation S-X (SX)

-Number 210

-Section 03

-Paragraph 8

-Article 5

+ Details

Name:	us-gaap_InterestExpenseDebtExcludingAmortization
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration

X

- Definition

The net amount of nonoperating interest income (expense).

+ References

No definition available.

+ Details

Name:	us-gaap_InterestIncomeExpenseNonoperatingNet
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	duration

X

- Details

Name:	us-gaap_LongtermDebtTypeAxis=us-gaap_CapitalLeaseObligationsMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	us-gaap_LongtermDebtTypeAxis=us-gaap_CorporateDebtSecuritiesMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	us-gaap_LongtermDebtTypeAxis=us-gaap_LineOfCreditMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type: