Condensed Consolidated Statements of Cash Flows (Unaudited) - USD ($) $ in Thousands	6 Months Ended
	Jun. 30, 2017	Jun. 30, 2016
Operating Activities
Net loss	$ (9,917)	$ (1,537)
Adjustments to reconcile net loss to net cash provided by operating activities:
Depreciation and amortization	25,942	29,197
Loss on disposal of fixed assets	79	1
Share-based compensation expense	11,056	9,386
Income tax benefits from employee stock plans	11	681
Deferred income taxes	(12,646)	(3,877)
Amortization of debt financing fees	795	795
Changes in operating assets and liabilities, net of business acquisitions:
Accounts receivable	(770)	(7,775)
Inventories	(12,226)	(6,919)
Prepaid expenses	2,645	(4,852)
Other current assets	202	78
Investment in sales-type leases	5,482	(6,558)
Other long-term assets	(34)	1,019
Accounts payable	23,357	6,736
Accrued compensation	4,529	210
Accrued liabilities	2,165	(2,195)
Deferred revenue	(2,865)	4,895
Other long-term liabilities	1,119	(2,398)
Net cash provided by operating activities	38,924	16,887
Investing Activities
Purchases of intangible assets, intellectual property and patents	(160)	(1,185)
Software development for external use	(6,748)	(6,681)
Purchases of property and equipment	(6,493)	(5,938)
Business acquisitions, net of cash acquired	(4,446)	(271,458)
Net cash used in investing activities	(17,847)	(285,262)
Financing Activities
Proceeds from debt	10,000	247,051
Repayment of debt and revolving credit facility	(70,500)	(22,500)
Payment for contingent consideration	0	(3,000)
Proceeds from issuances under stock-based compensation plans	15,783	8,639
Employees' taxes paid related to restricted stock units	(2,638)	(1,563)
Net cash provided by (used in) financing activities	(47,355)	228,627
Effect of exchange rate changes on cash and cash equivalents	(1,274)	(1,440)
Net decrease in cash and cash equivalents	(27,552)	(41,188)
Cash and cash equivalents at beginning of period	54,488	82,217
Cash and cash equivalents at end of period	26,936	41,029
Supplemental disclosure of non-cash activities
Unpaid purchases of property and equipment	641	593
Effect of adoption of new accounting standard	$ 1,582	$ 0