CONSOLIDATED BALANCE SHEETS (USD $) In Thousands, unless otherwise specified	Mar. 31, 2015	Sep. 30, 2014
Current assets
Cash and cash equivalents	$ 73,176	$ 94,114
Marketable securities	69,327	68,130
Accounts receivable, net	94,679	80,106
Inventories	90,558	93,567
Deferred tax assets	18,871	19,009
Prepaid expenses and other current assets	14,841	19,387
Total current assets	361,452	374,313
Property, plant and equipment, net	46,833	50,183
Long-term marketable securities	64,601	83,212
Long-term deferred tax assets	69,595	67,563
Goodwill	118,264	109,501
Intangible assets, net	59,693	59,550
Equity method investments	27,027	28,944
Other assets	9,490	4,772
Total assets	756,955	778,038
Current liabilities
Accounts payable	43,610	33,740
Capital lease obligation	881	881
Deferred revenue	19,943	26,279
Accrued warranty and retrofit costs	6,203	6,499
Accrued compensation and benefits	15,345	21,663
Accrued restructuring costs	3,297	3,475
Accrued income taxes payable	2,789	1,808
Deferred tax liabilities	458	808
Accrued expenses and other current liabilities	15,027	18,688
Total current liabilities	107,553	113,841
Long-term capital lease obligation	7,173	7,417
Long-term tax reserves	4,175	5,708
Long-term deferred tax liabilities	3,418	2,567
Long-term pension liability	2,342	1,774
Other long-term liabilities	3,467	3,842
Total liabilities	128,128	135,149
Commitments and contingencies (Note 18)
Equity
Preferred stock, $0.01 par value, 1,000,000 shares authorized, no shares issued or outstanding	0	0
Common stock, $0.01 par value, 125,000,000 shares authorized, 80,943,277 shares issued and 67,481,408 shares outstanding at March 31, 2015, 80,375,777 shares issued and 66,913,908 shares outstanding at September 30, 2014	809	804
Additional paid-in capital	1,840,426	1,834,619
Accumulated other comprehensive income	9,333	15,687
Treasury stock at cost, 13,461,869 shares	(200,956)	(200,956)
Accumulated deficit	(1,020,785)	(1,007,265)
Total equity	628,827	642,889
Total liabilities and equity	$ 756,955	$ 778,038