CONSOLIDATED BALANCE SHEETS - USD ($) $ in Thousands	Dec. 31, 2017	Dec. 31, 2016
Current assets:
Cash and cash equivalents	$ 62,473	$ 56,780
Short-term investments	211,281	271,661
Accounts receivable, net	154,213	141,768
Inventories	64,657	65,523
Other current assets	14,295	17,346
Total current assets	506,919	553,078
Property and equipment, net	109,919	118,585
Severance assets	18,302	15,870
Intangible assets, net	228,195	278,031
Goodwill	472,437	471,228
Deferred taxes and other long-term assets	66,162	36,713
Total assets	1,401,934	1,473,505
Current liabilities:
Accounts payable	59,090	59,533
Accrued liabilities	114,058	105,042
Deferred revenue	23,485	24,364
Current portion of term debt	0	23,628
Total current liabilities	196,633	212,567
Accrued severance	23,205	19,874
Deferred revenue	17,820	15,968
Term debt	72,761	218,786
Other long-term liabilities	34,067	30,580
Total liabilities	344,486	497,775
Commitments and contingencies
Shareholders’ equity
Ordinary shares (in shares)	221	209
Additional paid-in capital	873,979	774,605
Accumulated other comprehensive income (loss)	1,618	(928)
Retained earnings	181,630	201,844
Total shareholders’ equity	1,057,448	975,730
Total liabilities and shareholders' equity	$ 1,401,934	$ 1,473,505