Condensed Consolidated Statements of Cash Flows - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2016	Mar. 31, 2015
Operating Activities
Net (loss) income	$ (378)	$ 6,318
Adjustments to reconcile net (loss) income to net cash provided by operating activities:
Depreciation and amortization	14,473	5,711
Loss on disposal of fixed assets	13	4
Provision for receivable allowance	92	281
Share-based compensation expense	3,891	3,665
Income tax benefits from employee stock plans	164	822
Excess tax benefits from employee stock plans	(220)	(1,151)
Provision for excess and obsolete inventories	248	270
Deferred income taxes	(1,042)	361
Amortization of debt financing fees	397	0
Changes in operating assets and liabilities:
Accounts receivable, net	(1,162)	(5,631)
Inventories	(5,361)	(1,906)
Prepaid expenses	1,983	6,707
Other current assets	324	1,124
Investment in sales-type leases, net	(8,928)	285
Other long-term assets	1,232	(85)
Accounts payable	1,568	2,200
Accrued compensation	4,114	(2,810)
Accrued liabilities	417	2,718
Deferred revenue	12,663	(6,557)
Other long-term liabilities	(2,701)	(1,012)
Net cash provided by operating activities	21,787	11,314
Investing Activities
Purchases of intangible assets, intellectual property, and patents	(1,074)	(103)
Software development for external use	(3,070)	(2,957)
Purchases of property and equipment	(4,261)	(1,048)
Business acquisitions, net of cash acquired	(271,458)	0
Net cash used in investing activities	(279,863)	(4,108)
Financing Activities
Proceeds from debt, net	247,059	0
Repayment of debt under revolving credit facility	(20,000)	0
Payment for contingent consideration	(3,000)	0
Proceeds from issuances under stock-based compensation plans	5,149	6,224
Employees' taxes paid related to restricted stock units	(382)	(800)
Excess tax benefits from employee stock plans	220	1,151
Net cash provided by financing activities	229,046	6,575
Effect of exchange rate changes on cash and cash equivalents	300	(116)
Net (decrease) increase in cash and cash equivalents	(28,730)	13,665
Cash and cash equivalents at beginning of period	82,217	125,888
Cash and cash equivalents at end of period	$ 53,487	$ 139,553