ACQUISITIONS Pro Forma Impact of Acquisitions (Details) (USD $) In Thousands, except Per Share data, unless otherwise specified	3 Months Ended		9 Months Ended
	Sep. 30, 2014	Sep. 30, 2013	Sep. 30, 2014	Sep. 30, 2013
Business Acquisition [Line Items]
Interest expense	$ 9,563	$ 7,183	$ 29,197	$ 20,169
Amortization expense	(1,620)	(1,009)	(4,943)	(4,801)
Income tax benefit (expense)	(1,930)	13	(8,484)	42
All current acquirees
Business Acquisition [Line Items]
Revenues	243,959	214,317	730,377	651,344
Loss from continuing operations, net of income taxes	(37,575)	(24,834)	(81,442)	(41,622)
Basic and diluted loss per share from continuing operations (in usd per share)	$ (0.55)	$ (0.37)	$ (1.19)	$ (0.66)
Interest expense	0	247	0	1,578
Amortization expense	0	(504)	0	(866)
Income tax benefit (expense)	$ 0	$ (622)	$ 0	$ (2,785)