ACQUISITIONS Pro Forma Impact of Acquisitions (Details) (USD $) In Thousands, except Per Share data, unless otherwise specified	3 Months Ended		6 Months Ended
	Jun. 30, 2014	Jun. 30, 2013	Jun. 30, 2014	Jun. 30, 2013
Business Acquisition [Line Items]
Interest expense	$ 9,135	$ 6,508	$ 19,634	$ 12,986
Amortization expense	(1,620)	(1,710)	(3,323)	(3,792)
Income tax benefit (expense)	(3,063)	(146)	(6,554)	29
All current acquirees
Business Acquisition [Line Items]
Revenues	247,125	211,576	486,418	437,027
Loss from continuing operations, net of income taxes	(18,611)	(8,342)	(43,867)	(16,788)
Basic loss per share from continuing operations	$ (0.27)	$ (0.13)	$ (0.64)	$ (0.28)
Diluted loss per share from continuing operations	$ (0.27)	$ (0.13)	$ (0.64)	$ (0.28)
Interest expense	0	827	0	1,331
Amortization expense	0	(238)	0	(362)
Income tax benefit (expense)	$ 0	$ 878	$ 0	$ (2,163)