UNAUDITED CONSOLIDATED STATEMENTS OF OPERATIONS - USD ($) shares in Thousands, $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2015	Jun. 30, 2014	Jun. 30, 2015	Jun. 30, 2014
Income Statement [Abstract]
Product revenue	$ 241,020	$ 225,277	$ 480,067	$ 441,180
Service revenue	21,343	21,848	43,977	45,238
Total revenue	262,363	247,125	524,044	486,418
Cost of product revenue	176,763	161,658	350,710	313,398
Cost of service revenue	19,634	20,111	40,895	42,564
Total cost of revenue	196,397	181,769	391,605	355,962
Gross profit	65,966	65,356	132,439	130,456
Selling, general and administrative expenses	60,367	57,244	118,140	116,424
Change in fair value of contingent consideration	(93)	(4,646)	(72)	(6,855)
Bad debt expense	15,146	8,360	23,466	14,961
Impairment of goodwill	238,000	0	238,000	0
Acquisition and integration expenses	259	5,333	479	11,832
Restructuring and other expenses	4,803	3,858	8,266	8,450
Amortization of intangibles	1,489	1,620	2,979	3,323
Loss from continuing operations	(254,005)	(6,413)	(258,819)	(17,679)
Interest expense, net	9,080	9,135	18,243	19,634
Loss from continuing operations before income taxes	(263,085)	(15,548)	(277,062)	(37,313)
Income tax expense (benefit)	(19,921)	3,063	(17,993)	6,554
Loss from continuing operations, net of income taxes	(243,164)	(18,611)	(259,069)	(43,867)
Loss from discontinued operations, net of income taxes	(1,644)	(1,207)	(5,412)	(1,265)
Net loss	(244,808)	(19,818)	(264,481)	(45,132)
Accrued dividends on preferred stock	(1,805)	0	(2,258)	0
Deemed dividends on preferred stock	(2,186)	0	(3,350)	0
Loss attributable to common stockholders	$ (248,799)	$ (19,818)	$ (270,089)	$ (45,132)
Loss per common share:
Loss from continuing operations, basic and diluted (in dollars per share)	$ (3.60)	$ (0.27)	$ (3.85)	$ (0.64)
Loss from discontinued operations, basic and diluted (in dollars per share)	(0.02)	(0.02)	(0.08)	(0.02)
Loss per common share, basic and diluted (in dollars per share)	$ (3.62)	$ (0.29)	$ (3.93)	$ (0.66)
Weighted average common shares outstanding
Weighted average number of common shares outstanding (in shares)	68,698	68,468	68,668	68,354