UNAUDITED CONSOLIDATED STATEMENTS OF OPERATIONS (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
Income Statement [Abstract]
Product revenue	$ 226,421	$ 169,011	$ 667,601	$ 469,594
Service revenue	17,538	21,620	62,776	74,380
Total revenue	243,959	190,631	730,377	543,974
Cost of product revenue	162,125	115,565	475,523	323,823
Cost of service revenue	16,832	13,411	59,396	44,734
Total cost of revenue	178,957	128,976	534,919	368,557
Gross profit	65,002	61,655	195,458	175,417
Selling, general and administrative expenses	58,702	52,454	175,126	149,671
Change in fair value of contingent consideration	(86)	(412)	(6,941)	(412)
Bad debt expense	26,080	3,624	41,041	10,265
Acquisition and integration expenses	2,922	4,890	14,754	13,025
Restructuring and other expenses	1,846	778	10,296	3,457
Amortization of intangibles	1,620	1,009	4,943	4,801
Loss from continuing operations	(26,082)	(688)	(43,761)	(5,390)
Interest expense, net	9,563	7,183	29,197	20,169
Loss on extinguishment of debt	0	15,898	0	15,898
Loss from continuing operations before income taxes	(35,645)	(23,769)	(72,958)	(41,457)
Income tax expense (benefit)	1,930	(13)	8,484	(42)
Loss from continuing operations, net of income taxes	(37,575)	(23,756)	(81,442)	(41,415)
Loss from discontinued operations, net of income taxes	(1,135)	(10,331)	(2,400)	(9,680)
Net loss	$ (38,710)	$ (34,087)	$ (83,842)	$ (51,095)
Loss per common share:
Loss from continuing operations, basic and diluted (in usd per share)	$ (0.55)	$ (0.37)	$ (1.19)	$ (0.66)
Loss from discontinued operations, basic and diluted (in usd per share)	$ (0.02)	$ (0.16)	$ (0.04)	$ (0.15)
Loss per common share, basic and diluted (in usd per share)	$ (0.57)	$ (0.53)	$ (1.23)	$ (0.81)
Weighted average common shares outstanding
Weighted average number of common shares outstanding (in shares)	68,615	67,912	68,421	63,368