CONDENSED CONSOLIDATED BALANCE SHEETS (USD $) In Thousands, unless otherwise specified	Mar. 31, 2014	Dec. 31, 2013
Current assets:
Cash and cash equivalents	$ 107,558	$ 104,531
Accounts receivable, net of allowances of $710 and $490, respectively	75,496	58,597
Inventories	30,975	31,457
Prepaid expenses	16,378	18,883
Deferred tax assets	12,636	12,635
Other current assets	7,799	7,675
Total current assets	250,842	233,778
Property and equipment, net	35,178	35,254
Non-current net investment in sales-type leases	11,644	11,485
Goodwill	111,343	111,343
Intangible assets, net	80,573	81,602
Non-current deferred tax assets	1,164	1,102
Other assets	19,661	17,937
Total assets	510,405	492,501
Current liabilities:
Accounts payable	20,154	16,471
Accrued compensation	12,018	19,604
Accrued liabilities	13,494	13,746
Deferred service revenue	21,328	22,626
Deferred gross profit	25,106	19,957
Total current liabilities	92,100	92,404
Non-current deferred service revenue	19,773	17,763
Non-current deferred tax liabilities	27,926	28,162
Other long-term liabilities	5,430	5,175
Total liabilities	145,229	143,504
Stockholders' equity:
Total stockholders' equity	365,176	348,997
Total liabilities and stockholders' equity	$ 510,405	$ 492,501