Acquisitions (Tables)

6 Months Ended

Jun. 30, 2014

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



	2014 Acquisitions			2013 Acquisitions
Accounts receivable	$	26,107		$	22,666
Other current assets	2,264			922
Property and equipment	17,217			14,392
Goodwill	53,812			78,646
Customer relationship intangible assets	20,894			19,727
Other noncurrent assets	242			12
Accounts payable and other liabilities	(19,726		)	(35,717		)
Total	$	100,810		$	100,648

2013 [Member]

Business Acquisition [Line Items]

Business Acquisition, Pro Forma Information [Table Text Block]

The following supplemental unaudited pro forma financial information of the Company for the three and six months ended June 30, 2013 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 June 30,		Six Months Ended June 30,
	2013		2013
Revenues	$	375,038	$	722,111
Net income	$	13,885	$	24,724

2014 [Member]

Business Acquisition [Line Items]

Business Acquisition, Pro Forma Information [Table Text Block]

The following supplemental unaudited pro forma financial information of the Company for the three and six months ended June 30, 2013 and the six months ended June 30, 2014 includes the results of operations for the 2014 acquisitions, in the aggregate, as if the acquisitions had been completed on January 1, 2013 (in thousands). The 2014 acquisitions were completed in the first quarter of 2014; accordingly, the actual and pro forma results for the three months ended June 30, 2014 are the same.



			Six Months Ended June 30,
	2013		2014		2013
Revenues	$	384,602	$	876,292	$	729,239
Net income	$	15,183	$	25,817	$	26,688