STOCKHOLDERS' EQUITY: - Other (Details) - shares	9 Months Ended
	Sep. 30, 2016	Sep. 30, 2015
Directors' Stock Award Plan
Share based Compensation Plan
Common shares received on election as director	1,200
Additional shares issued at each annual general meeting	1,200
Total SCC shares reserved for the plan	600,000	600,000
Activity in directors' stock award plan
Total shares granted at the beginning of the period (in shares)	(322,800)	(309,600)
Granted in the period (in shares)	(12,000)	(13,200)
Total shares granted at the end of the period (in shares)	(334,800)	(322,800)
Remaining shares reserved	265,200	277,200
Employee Stock Purchase 2007 Plan
Share based compensation
Percentage of title acquired by employee in every two years on shares paid in previous two years	50.00%
Period of plan	8 years
Ratio of bonus shares granted to participant	0.1
Employee Stock Purchase 2015 Plan
Activity in directors' stock award plan
Granted in the period (in shares)		(2,656,386)
Share based compensation
Percentage of title acquired by employee in every two years on shares paid in previous two years	50.00%
Period of plan	8 years
Ratio of bonus shares granted to participant	0.1