Consolidated Balance Sheets - USD ($) $ in Thousands	Dec. 31, 2016	Dec. 31, 2015
Current assets:
Cash and cash equivalents	$ 54,488	$ 82,217
Accounts receivable, net of allowances of $4,796 and $1,240, respectively	150,303	107,957
Inventories	69,297	46,594
Prepaid expenses	28,646	19,586
Other current assets	12,674	7,774
Total current assets	315,408	264,128
Property and equipment, net	42,011	32,309
Long-term investment in sales-type leases, net	20,585	14,484
Goodwill	327,724	147,906
Intangible assets, net	190,283	89,665
Long-term deferred tax assets	4,041	2,361
Other long-term assets	35,051	27,894
Total assets	935,103	578,747
Current liabilities:
Accounts payable	27,069	22,646
Accrued compensation	26,722	18,195
Accrued liabilities	31,195	30,133
Long-term debt, current portion, net	8,410	0
Deferred revenue, net	87,516	53,656
Total current liabilities	180,912	124,630
Long-term deferred revenue	17,051	17,975
Long-term deferred tax liabilities	51,592	21,822
Other long-term liabilities	8,210	11,932
Long-term debt, net	245,731	0
Total liabilities	503,496	176,359
Commitments and contingencies (Note 10)
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; 45,778 and 44,739 shares issued; 36,633 and 35,594 shares outstanding, respectively	46	45
Treasury stock at cost, 9,145 shares outstanding, respectively	(185,074)	(185,074)
Additional paid-in capital	525,758	490,354
Retained earnings	100,396	99,793
Accumulated other comprehensive income	(9,519)	(2,730)
Total stockholders’ equity	431,607	402,388
Total liabilities and stockholders’ equity	$ 935,103	$ 578,747