Equity Investments (Tables)

3 Months Ended

Mar. 31, 2013

Equity Investments [Abstract]

Schedule of Financial Information Related to Unconsolidated Entities Included in Consolidated Statement of Income

	Three Months Ended
	March 31,
	2013		2012
Revenues	$	315,396	$	317,317
Operating costs and expenses		283,365		277,256
Income from continuing operations before taxes		32,008		40,035