Condensed Consolidated Balance Sheets (Unaudited) - USD ($) $ in Thousands	Sep. 30, 2016	Dec. 31, 2015
Current assets:
Cash and cash equivalents	$ 47,287	$ 82,217
Accounts receivable, net of allowances for doubtful accounts of $1,218 and $1,240, respectively	177,019	107,957
Inventories	74,125	46,594
Prepaid expenses	29,620	19,586
Other current assets	9,016	7,774
Total current assets	337,067	264,128
Property and equipment, net	41,034	32,309
Long-term investment in sales-type leases, net	18,756	14,484
Goodwill	311,420	147,906
Intangible assets, net	187,571	89,665
Long-term deferred tax assets	2,955	2,361
Other long-term assets	32,612	27,894
Total assets	931,415	578,747
Current liabilities:
Accounts payable	36,715	22,646
Accrued compensation	27,117	18,195
Accrued liabilities	32,809	30,133
Long-term debt, net, current	8,410	0
Deferred revenue, net	93,120	53,656
Total current liabilities	198,171	124,630
Long-term deferred revenue	17,096	17,975
Long-term deferred tax liabilities	61,576	21,822
Other long-term liabilities	12,173	11,932
Long-term debt, net	214,834	0
Total liabilities	503,850	176,359
Commitments and contingencies
Stockholders’ equity:
Preferred stock, $0.001 par value, 5,000 shares authorized; no shares issued	0	0
Common stock, $0.001 par value, 100,000 shares authorized; 45,656 and 44,739 shares issued; 36,511 and 35,594 shares outstanding, respectively	46	45
Treasury stock at cost, 9,145 shares outstanding	(185,074)	(185,074)
Additional paid-in capital	520,272	490,354
Retained earnings	100,239	99,793
Accumulated other comprehensive loss	(7,918)	(2,730)
Total stockholders’ equity	427,565	402,388
Total liabilities and stockholders’ equity	$ 931,415	$ 578,747