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Note 9 - Goodwill and Other Intangible Assets - Goodwill (Details)
$ in Thousands
6 Months Ended
Jun. 30, 2018
USD ($)
Balance
Noralta Acquisition (1) 119,858 [1]
Foreign currency translation (2,551)
Balance 117,307
Canadian Segment [Member]  
Balance
Noralta Acquisition (1) 119,858 [1]
Foreign currency translation (2,551)
Balance 117,307
Australian Segment [Member]  
Balance
Noralta Acquisition (1) [1]
Foreign currency translation
Balance
U.S. Segment [Member]  
Balance
Noralta Acquisition (1) [1]
Foreign currency translation
Balance
[1] Please see Note 7 - Acquisitions for further information.