UNAUDITED CONSOLIDATED STATEMENTS OF OPERATIONS (USD $) In Thousands, except Per Share data, unless otherwise specified	3 Months Ended
	Mar. 31, 2014	Mar. 31, 2013
Income Statement [Abstract]
Product revenue	$ 215,900	$ 150,024
Service revenue	23,743	31,105
Total revenue	239,643	181,129
Cost of product revenue	151,764	105,533
Cost of service revenue	22,737	19,615
Total cost of revenue	174,501	125,148
Gross profit	65,142	55,981
Selling, general and administrative expenses	59,384	47,005
Change in fair value of contingent consideration	(2,209)	0
Bad debt expense	6,605	3,180
Acquisition and integration expenses	6,499	4,623
Restructuring and other expenses	4,592	1,278
Amortization of intangibles	1,703	2,082
Loss from continuing operations	(11,432)	(2,187)
Interest expense, net	10,499	6,478
Loss from continuing operations before income taxes	(21,931)	(8,665)
Income tax expense (benefit)	3,491	(224)
Loss from continuing operations, net of income taxes	(25,422)	(8,441)
Income from discontinued operations, net of income taxes	108	313
Net loss	$ (25,314)	$ (8,128)
Loss per common share:
Loss from continuing operations, basic and diluted	$ (0.37)	$ (0.15)
Income from discontinued operations, basic and diluted	$ 0.00	$ 0.01
Loss per common share, basic and diluted	$ (0.37)	$ (0.14)
Weighted average common shares outstanding
Basic (shares)	68,171	57,047