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SIGNIFICANT ACCOUNTING POLICIES: Property (Details) - USD ($)
$ in Thousands
12 Months Ended
Dec. 31, 2015
Dec. 31, 2014
Dec. 31, 2013
Property, plant and equipment:      
Depreciation expense $ 20,388 $ 20,758 $ 20,050
Carrying value of long-lived assets:      
Impairment charges of long-lived assets $ 0 $ 0 $ 0
Buildings | Minimum      
Property, plant and equipment:      
Useful lives 20 years    
Buildings | Maximum      
Property, plant and equipment:      
Useful lives 35 years    
Machinery and equipment | Minimum      
Property, plant and equipment:      
Useful lives 5 years    
Machinery and equipment | Maximum      
Property, plant and equipment:      
Useful lives 20 years