XML 62 R26.htm IDEA: XBRL DOCUMENT
v3.3.1.900

Interest expense | 12 Months Ended
--- | ---
Dec. 31, 2015
Interest Expense [Abstract] |
Interest expense | Interest expense
Year ended December 31, |  | 2015 |  |  | 2014 |  |  | 2013 |
Interest on capital lease obligations |  | $ | 3,044 |  |  | $ | 3,103 |  |  | $ | 2,716 |
Amortization of deferred financing costs (note 11(c)) |  | 1,961 |  |  | 1,594 |  |  | 4,326 |
Interest on Credit Facility |  | 1,031 |  |  | 1,268 |  |  | 2,424 |
Interest on Series 1 Debentures |  | 3,986 |  |  | 6,168 |  |  | 12,507 |
Interest on long term debt |  | $ | 10,022 |  |  | $ | 12,133 |  |  | $ | 21,973 |
Other interest (income) expense |  | (142 | ) |  | 102 |  |  | (276 | )
|  | $ | 9,880 |  |  | $ | 12,235 |  |  | $ | 21,697 |

X
- Definition Interest expense. + References No definition available. + Details
Name: | noa_InterestExpenseDisclosureTextBlock
Namespace Prefix: | noa_
Data Type: | nonnum:textBlockItemType
Balance Type: | na
Period Type: | duration

X
- References No definition available. + Details
Name: | us-gaap_InterestExpenseAbstract
Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration