Acquisitions (Tables)

9 Months Ended

Sep. 30, 2013

Business Combinations [Abstract]

Schedule of allocated purchase price paid to fair value of acquired net assets for acquisitions

	2013 Acquisitions			2012 Acquisitions
Accounts receivable	$	22,702		$	15,175
Other current assets	871			1,240
Property and equipment	14,399			32,387
Goodwill	77,041			75,135
Customer relationship intangible assets	11,681			5,932
Other noncurrent assets	12			(377		)
Accounts payable and other liabilities	(26,047		)	(40,777		)
Total	$	100,659		$	88,715

Business Acquisition, Pro Forma Information

The following supplemental unaudited pro forma financial information of the Company for the three and nine months ended September 30, 2012 includes the results of operations for the 2012 acquisitions, in the aggregate, as if the acquisitions had been completed on January 1, 2011 (in thousands):

	Three Months Ended September 30, 2012		Nine Months Ended September 30, 2012
Revenues	$	297,048	$	884,413
Net income	$	9,971	$	29,290

The following supplemental unaudited pro forma financial information of the Company for the three and nine months ended September 30, 2013 and 2012 includes the results of operations for the 2013 acquisitions, in the aggregate, as if the acquisitions had been completed on January 1, 2012 (in thousands):

	Three Months Ended September 30,				Nine Months Ended September 30,
	2013		2012		2013		2012
Revenues	$	377,327	$	328,754	$	1,099,439	$	921,033
Net income	$	13,199	$	10,234	$	37,923	$	28,868