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STOCKHOLDERS' EQUITY: (Details 3) $ / shares in Units, $ in Millions	12 Months Ended
	Dec. 31, 2015 MXN / shares shares	Dec. 31, 2015 USD ($) $ / shares shares	Dec. 31, 2014 USD ($) shares	Dec. 31, 2013 USD ($) shares	Dec. 31, 2010 MXN / shares	Dec. 31, 2010 $ / shares
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
Stock based compensation expense | $		$ 0.4	$ 0.3
Total SCC shares reserved for the plan	600,000	600,000	600,000
Activity in directors' stock award plan
Total shares granted at the beginning of the period (in shares)		(309,600)	(297,600)
Granted in the period (in shares)		(13,200)	(12,000)
Total shares granted at the end of the period (in shares)		(322,800)	(309,600)	(297,600)
Remaining shares reserved	277,200	277,200	290,400
Employee Stock Purchase 2007 Plan
Share based Compensation Plan
Stock based compensation expense | $			$ 2.1	$ 2.1
Share based compensation
Percentage of title acquired by employee in every two years on shares paid in previous two years		50.00%
Period describing the expiration of the contribution period and the bonus eligibility		8 years
Bonus shares granted to participant (as a ratio)		0.1
Employee Stock Purchase 2010 Plan
Share based Compensation Plan
Stock based compensation expense | $		$ 0.6	$ 0.6	$ 0.6
Share based compensation
Purchase price for initial subscription (in dollars per share) | (per share)					MXN 26.51	$ 1.54
Employee Stock Purchase 2015 Plan
Share based Compensation Plan
Stock based compensation expense | $		$ 0.4
Activity in directors' stock award plan
Granted in the period (in shares)		(2,652,386)
Share based compensation
Purchase price for initial subscription (in dollars per share) | (per share)	MXN 38.44	$ 2.23
Percentage of title acquired by employee in every two years on shares paid in previous two years		50.00%
Period describing the expiration of the contribution period and the bonus eligibility		8 years
Bonus shares granted to participant (as a ratio)		0.1

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- Definition

Represents the additional number of shares issued to the director at each annual general meeting.

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Represents the ratio of bonus granted to the participant upon meeting the eligibility period of the share based compensation plan.

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The period after which the employee has purchased shares through the plan through payroll deductions and is therefore eligible for the bonus grant.

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Represents the purchase price of shares for the initial subscription as a part of share based compensation award plan.

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Represents the expense recognized during the period arising from equity-based compensation arrangements (for example, shares of stock, unit, stock options or other equity instruments) with employees, directors and certain consultants qualifying for treatment as employees.

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Reference 1: http://www.xbrl.org/2003/role/presentationRef
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The number of grants made during the period on other than stock (or unit) option plans (for example, phantom stock or unit plan, stock or unit appreciation rights plan, performance target plan).

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The maximum number of shares (or other type of equity) originally approved (usually by shareholders and board of directors), net of any subsequent amendments and adjustments, for awards under the equity-based compensation plan. As stock or unit options and equity instruments other than options are awarded to participants, the shares or units remain authorized and become reserved for issuance under outstanding awards (not necessarily vested).

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The difference between the maximum number of shares (or other type of equity) authorized for issuance under the plan (including the effects of amendments and adjustments), and the sum of: 1) the number of shares (or other type of equity) already issued upon exercise of options or other equity-based awards under the plan; and 2) shares (or other type of equity) reserved for issuance on granting of outstanding awards, net of cancellations and forfeitures, if applicable.

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