Equity Investments (Tables)

9 Months Ended

Sep. 30, 2013

Equity Investments [Abstract]

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

	Three Months Ended				Nine Months Ended
	September 30,				September 30,
	2013		2012		2013		2012
Revenues	$	306,336	$	294,461	$	942,013	$	926,886
Operating costs and expenses		284,105		266,012		835,533		817,572
Income from continuing operations before taxes		22,204		28,421		106,405		109,238