Earnings per Common Share (Tables)

3 Months Ended

Mar. 31, 2013

Earnings per Common Share [Abstract]

Earnings per Common Share

The following table sets forth a reconciliation of net income and weighted average shares outstanding used in computing basic and diluted net income per common share:

	Three Months Ended March 31,
	2013		2012
Net income	$	33.8	$	69.2
Less: Net income attributable to noncontrolling interests		20.4		59.6
Net income attributable to common shareholders	$	13.4	$	9.6
Weighted average shares outstanding - basic		41.6		41.0
Net income available per common share - basic	$	0.32	$	0.23
Weighted average shares outstanding		41.6		41.0
Dilutive effect of unvested stock awards		0.4		0.8
Weighted average shares outstanding - diluted		42.0		41.8
Net income available per common share - diluted	$	0.32	$	0.23