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Accounts receivable (Details) (CAD) In Thousands, unless otherwise specified | 12 Months Ended |  |
--- | --- | --- | ---
Dec. 31, 2014 | Dec. 31, 2013 | Dec. 31, 2012
Receivables [Abstract] |  |  |
Accounts receivable – trade | 54,733 us-gaap_AccountsReceivableGrossCurrent | 59,309 us-gaap_AccountsReceivableGrossCurrent |
Accounts receivable – holdbacks | 10,741 noa_AccountsReceivableHoldbacksGrossCurrent | 9,055 noa_AccountsReceivableHoldbacksGrossCurrent |
Accounts receivable – other | 1,029 us-gaap_OtherReceivablesGrossCurrent | 1,813 us-gaap_OtherReceivablesGrossCurrent |
Allowance for doubtful accounts (note 15(d)) | 0 us-gaap_AllowanceForDoubtfulAccountsReceivableCurrent | 0 us-gaap_AllowanceForDoubtfulAccountsReceivableCurrent | (185)us-gaap_AllowanceForDoubtfulAccountsReceivableCurrent
Total accounts receivable | 66,503 us-gaap_AccountsAndOtherReceivablesNetCurrent | 70,177 us-gaap_AccountsAndOtherReceivablesNetCurrent |
Accounts receivable – holdback percentage | 10.00%noa_AccountsReceivableMaximumHoldbackPercentage |  |

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- Definition Accounts Receivable, Holdbacks, Gross, Current + References No definition available. + Details
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- Definition Accounts Receivable, Maximum Holdback Percentage + References No definition available. + Details
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- Definition Amount due from customers, clients, or other third-parties, or arising from transactions not separately disclosed, within one year of the balance sheet date (or the normal operating cycle, whichever is longer), net of allowances established for the purpose of reducing such receivables to an amount that approximates their net realizable value. + References No definition available. + Details
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- Definition Amounts due from customers or clients, within one year of the balance sheet date (or the normal operating cycle, whichever is longer) for goods or services (including trade receivables) that have been delivered or sold in the normal course of business. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02.3) -URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 03 -Paragraph 3 -Subparagraph a, b -Article 5 + Details
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- Definition A valuation allowance for trade and other receivables due to an Entity within one year (or the normal operating cycle, whichever is longer) that are expected to be uncollectible. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 02 -Paragraph 4 -Article 5 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 310 -SubTopic 10 -Section 50 -Paragraph 4 -URI http://asc.fasb.org/extlink&oid=28368275&loc=d3e5074-111524 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02.4) -URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682 + Details
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- Definition Amounts of other receivables due within one year of the balance sheet date (or one operating cycle, if longer) from third parties or arising from transactions not separately disclosed. + References No definition available. + Details
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- Details
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