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BENEFIT PLANS: (Tables)

9 Months Ended

Sep. 30, 2012

SCC Defined Benefit Pension Plans

Components of net periodic benefit costs

Schedule of components of net periodic benefit costs

		2012			2011
Interest cost		$	0.4		$	0.4
Expected return on plan assets		(0.5		)	(0.5		)
Amortization of net loss (gain)		0.1			0.1
Net periodic benefit costs		$	—		$	—

Minera Mexico Pension Plans

Components of net periodic benefit costs

Schedule of components of net periodic benefit costs

		2012			2011

Interest cost		$	0.5		$	0.5
Service cost		0.7			0.8
Expected return on plan assets		(2.2		)	(2.5		)
Amortization of transition assets, net		—			(0.1		)
Amortization of net actuarial loss		(0.6		)	(1.1		)
Amortization of prior services cost		—			—
Net periodic benefit cost		$	(1.6	)	$	(2.4	)

Minera Mexico Post-retirement Health Care Plan

Components of net periodic benefit costs

Schedule of components of net periodic benefit costs

		2012			2011

Interest cost		$	1.1		$	2.8
Service cost		—			—
Amortization of net loss (gain)		(0.2		)	—
Amortization of transition obligation		—			1.1
Net periodic benefit cost		$	0.9		$	3.9