XML 22 R55.htm IDEA: XBRL DOCUMENT v2.4.1.9
Debt And Other Financing Arrangements Short-term borrowings (Details) (USD $)
Dec. 31, 2014
Dec. 31, 2013
Short-term Debt [Line Items]    
Other credit facilities amount outstanding $ 21,000,000cnw_OtherCreditFacilitiesAmountOutstanding  
Short-term borrowings 1,736,000us-gaap_ShortTermBorrowings 1,588,000us-gaap_ShortTermBorrowings
Non-interest bearing borrowings $ 1,300,000cnw_NonInterestBearingBorrowings $ 1,600,000cnw_NonInterestBearingBorrowings