CONSOLIDATED BALANCE SHEETS - USD ($) $ in Thousands	Jun. 30, 2015	Sep. 30, 2014
Current assets:
Cash and cash equivalents	$ 338,693	$ 284,155
Accounts receivable, less allowance for doubtful accounts of $1,242 at June 30, 2015, and $1,392 at September 30, 2014	49,994	60,693
Inventories	67,592	64,979
Prepaid expenses and other current assets	15,037	10,645
Deferred income taxes	7,762	7,521
Total current assets	479,078	427,993
Property, plant and equipment, net	94,072	100,821
Goodwill	42,688	43,245
Other intangible assets, net	5,326	7,163
Deferred income taxes	9,282	11,353
Other long-term assets	17,390	10,592
Total assets	647,836	601,167
Current liabilities:
Accounts payable	16,293	15,304
Accrued expenses, income taxes payable and other current liabilities	33,178	31,394
Current portion of long-term debt	8,750	8,750
Total current liabilities	58,221	55,448
Long-term debt, net of current portion	157,500	164,063
Deferred income taxes	118	510
Other long-term liabilities	14,590	9,144
Total liabilities	$ 230,429	$ 229,165
Commitments and contingencies (Note 9)
Stockholders' equity:
Common Stock: Authorized: 200,000,000 shares, $0.001 par value; Issued: 33,452,575 shares at June 30, 2015, and 31,927,601 shares at September 30, 2014	$ 33	$ 32
Capital in excess of par value of common stock	490,165	437,266
Retained earnings	271,555	227,942
Accumulated other comprehensive income	393	9,255
Treasury stock at cost, 9,041,657 shares at June 30, 2015, and 8,142,687 shares at September 30, 2014	(344,739)	(302,493)
Total stockholders' equity	417,407	372,002
Total liabilities and stockholders' equity	$ 647,836	$ 601,167