Condensed Consolidated Statements of Cash Flows (Unaudited) - USD ($) $ in Thousands	6 Months Ended
	Jun. 30, 2016	Jun. 30, 2015
Operating Activities
Net (loss) income	$ (1,537)	$ 15,069
Adjustments to reconcile net (loss) income to net cash provided by operating activities:
Depreciation and amortization	29,197	11,977
Loss (gain) on disposal of fixed assets	1	(5)
Business Combination, Bargain Purchase, Gain Recognized, Amount	0	3,443
Provision for receivable allowance	364	480
Share-based compensation expense	9,386	7,301
Income tax benefits from employee stock plans	681	3,087
Excess tax benefits from employee stock plans	(934)	(3,159)
Provision for excess and obsolete inventories	850	168
Deferred income taxes	(3,877)	(1,717)
Amortization of debt financing fees	795	0
Changes in operating assets and liabilities:
Accounts receivable	(8,139)	(27,676)
Inventories	(7,769)	(9,633)
Prepaid expenses	(4,852)	8,234
Other current assets	78	1,507
Investment in sales-type leases	(6,558)	353
Other long-term assets	1,019	64
Accounts payable	6,736	1,364
Accrued compensation	210	(1,654)
Accrued liabilities	(2,195)	5,752
Deferred revenue	4,895	3,116
Other long-term liabilities	(2,398)	(995)
Net cash provided by operating activities	15,953	10,190
Investing Activities
Purchases of intangible assets, intellectual property, and patents	(1,185)	(225)
Software development for external use	(6,681)	(6,127)
Purchases of property and equipment	(5,938)	(3,764)
Business acquisitions, net of cash acquired	(271,458)	(23,625)
Net cash used in investing activities	(285,262)	(33,741)
Financing Activities
Proceeds from debt, net	247,051	0
Repayment of debt and revolving credit facility	(22,500)	0
Payment for contingent consideration	(3,000)	0
Proceeds from issuances under stock-based compensation plans	8,639	9,432
Employees' taxes paid related to restricted stock units	(1,563)	(2,046)
Common stock repurchases	0	(25,021)
Excess tax benefits from employee stock plans	934	3,159
Net cash provided (used) by financing activities	229,561	(14,476)
Effect of exchange rate changes on cash and cash equivalents	(1,440)	167
Net decrease in cash and cash equivalents	(41,188)	(37,860)
Cash and cash equivalents at beginning of period	82,217	125,888
Cash and cash equivalents at end of period	41,029	88,028
Supplemental cash flow information
Cash paid for interest	2,751	80
Cash paid for taxes, net of refunds	4,933	3,620
Supplemental disclosure of non-cash investing activities
Unpaid purchases of property and equipment	593	524
Non-cash activity business acquisition	$ 0	$ 9,197