UNAUDITED CONSOLIDATED STATEMENTS OF OPERATIONS (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
Income Statement [Abstract]
Product revenue	$ 225,277	$ 150,559	$ 441,180	$ 300,583
Service revenue	21,848	21,764	45,238	52,760
Total revenue	247,125	172,323	486,418	353,343
Cost of product revenue	161,658	102,725	313,398	208,258
Cost of service revenue	20,111	11,823	42,564	31,323
Total cost of revenue	181,769	114,548	355,962	239,581
Gross profit	65,356	57,775	130,456	113,762
Selling, general and administrative expenses	57,244	50,295	116,424	97,217
Change in fair value of contingent consideration	(4,646)	0	(6,855)	0
Bad debt expense	8,360	3,461	14,961	6,641
Acquisition and integration expenses	5,333	3,512	11,832	8,135
Restructuring and other expenses	3,858	1,439	8,450	2,679
Amortization of intangibles	1,620	1,710	3,323	3,792
Loss from continuing operations	(6,413)	(2,642)	(17,679)	(4,702)
Interest expense, net	9,135	6,508	19,634	12,986
Loss from continuing operations before income taxes	(15,548)	(9,150)	(37,313)	(17,688)
Income tax expense (benefit)	3,063	146	6,554	(29)
Loss from continuing operations, net of income taxes	(18,611)	(9,296)	(43,867)	(17,659)
Income (loss) from discontinued operations, net of income taxes	(1,207)	416	(1,265)	651
Net loss	$ (19,818)	$ (8,880)	$ (45,132)	$ (17,008)
Loss per common share:
Loss from continuing operations, basic and diluted	$ (0.27)	$ (0.14)	$ (0.64)	$ (0.29)
Income (loss) from discontinued operations, basic and diluted	$ (0.02)	$ 0.00	$ (0.02)	$ 0.01
Loss per common share, basic and diluted	$ (0.29)	$ (0.14)	$ (0.66)	$ (0.28)
Weighted average common shares outstanding
Basic (shares)	68,468	65,025	68,354	61,058