Acquisitions (Tables)

9 Months Ended

Sep. 30, 2015

Business Combinations [Abstract]

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

	2014 Acquisitions
Accounts receivable	$	68,128
Other current assets	7,660
Property and equipment	29,892
Goodwill	153,522
Customer relationship intangible assets	54,347
Accounts payable and other liabilities	(82,644		)
Total	$	230,905

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 nine months ended September 30, 2014 includes the results of operations for the 2014 acquisitions, in the aggregate, as if the acquisitions had been completed on January 1, 2014 (in thousands).

	Three Months Ended		Nine Months Ended
	September 30,		September 30,
	2014		2014
Revenues	$	529,169	$	1,546,672
Net income	$	14,698	$	44,452