XML 57 R1.htm IDEA: XBRL DOCUMENT v3.19.3.a.u2
Document and Entity Information
 12 Months Ended
Dec. 31, 2019
shares
Document and Entity Information [Abstract]  
Entity Registrant Name North American Construction Group Ltd.
Entity Central Index Key 0001368519
Document Type 40-F
Document Period End Date Dec. 31, 2019
Amendment Flag false
Document Fiscal Year Focus 2019
Document Fiscal Period Focus FY
Current Fiscal Year End Date --12-31
Entity Common Stock, Shares Outstanding 27,502,912
Entity Current Reporting Status Yes
Entity Interactive Data Current Yes
Entity Emerging Growth Company false