XML 48 R27.htm IDEA: XBRL DOCUMENT
v2.4.0.6

Accumulated or Other Comprehensive Income (Loss) | 12 Months Ended
--- | ---
Dec. 31, 2011
Accumulated or Other Comprehensive Income (Loss) [Abstract] |
Accumulated or Other Comprehensive Income (Loss) |
18) | Accumulated or Other Comprehensive Income (Loss)
The majority of our Accumulated Other Comprehensive Income balance relates to foreign currency translation of our foreign subsidiary balances. During the year ended December 31, 2011, we have deducted from other comprehensive income (loss) $2,578 due to foreign currency translations. During the year ended December 31, 2010, we have deducted from other comprehensive income (loss) $6,726 due to foreign currency translation. During the year ended December 31, 2009, we have added to other comprehensive income (loss) $2,356 due to foreign currency translation. Income taxes on the foreign currency translation adjustment in other comprehensive income were not recognized because the earnings are intended to be indefinitely reinvested in those operations. Also deducted from accumulated other comprehensive income as of December 31, 2010 and 2009 were actuarial losses of, $392, net of tax and $315, net of tax, from our pension liability.

X
- Definition Accumulated or Other Comprehensive Income (Loss) + References No definition available. + Details
Name: | nnbr_AccumulatedOtherComprehensiveIncomeDisclosureTextBlock
Namespace Prefix: | nnbr_
Data Type: | nonnum:textBlockItemType
Balance Type: | na
Period Type: | duration

X
- Details
Name: | us-gaap_EquityAbstract
Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration