CONSOLIDATED BALANCE SHEETS - USD ($) $ in Thousands	Mar. 31, 2018	Mar. 31, 2017
Current assets:
Cash and cash equivalents	$ 390,661	$ 301,970
Short-term investments	269,313	178,179
Accounts receivable, net	152,888	141,177
Inventory, net	68,276	55,456
Other current assets	18,588	22,195
Total current assets	899,726	698,977
Long-term investments	0	127,176
Property, plant, and equipment, net	142,129	150,307
Goodwill and purchased intangibles, net	15,498	15,577
Deferred tax and other assets	19,534	25,122
Total assets	1,076,887	1,017,159
Current liabilities:
Accounts payable	45,417	42,885
Accrued liabilities	80,097	74,285
Total current liabilities	125,514	117,170
Long term debt, net of issuance costs	492,509	491,059
Long-term income taxes payable	87,328	11,729
Other long-term liabilities	18,566	15,045
Total liabilities	723,917	635,003
Commitments and contingencies (Note 8)
Stockholders' equity:
Preferred stock, $0.01 par value per share; 1,000 shares authorized, no shares outstanding	0	0
Common stock, $0.01 par value per share; 100,000 shares authorized, 48,088 shares and 49,278 shares issued at 2017 and 2018, respectively	816	804
Additional paid-in capital	876,645	818,777
Accumulated other comprehensive income	2,870	4,694
Retained earnings	299,066	319,931
Total stockholders' equity before treasury stock	1,179,397	1,144,206
Less: Treasury stock (common: 14,672 shares and 16,027 shares at 2017 and 2018, respectively) at cost	(826,427)	(762,050)
Total stockholders' equity	352,970	382,156
Total liabilities and stockholders' equity	$ 1,076,887	$ 1,017,159