CONSOLIDATED STATEMENTS OF CASH FLOWS (USD $) In Thousands, unless otherwise specified	3 Months Ended
	Dec. 31, 2012	Dec. 31, 2011
Cash flows from operating activities
Net income (loss)	$ (9,219)	$ 2,831
Adjustments to reconcile net income (loss) to net cash provided by operating activities:
Depreciation and amortization	6,441	5,268
Stock-based compensation	2,511	1,743
Amortization of premium on marketable securities	370	654
Undistributed earnings (losses) of joint ventures	6	(1,050)
Deferred income tax benefit	(4,310)
Pension settlement	87
Loss on disposal of long-lived assets	13
Changes in operating assets and liabilities, net of acquisitions and disposals:
Accounts receivable	20,216	3,935
Inventories	6,841	5,874
Prepaid expenses and other current assets	317	(490)
Accounts payable	(10,793)	(5,910)
Deferred revenue	(1,340)	(2,427)
Accrued warranty and retrofit costs	(1,127)	(152)
Accrued compensation and benefits	(4,054)	(4,270)
Accrued restructuring costs	2,390	32
Accrued expenses and other current liabilities	(3,237)	(929)
Net cash provided by operating activities	5,112	5,109
Cash flows from investing activities
Purchases of property, plant and equipment	(641)	(2,063)
Purchases of marketable securities	(18,168)	(23,579)
Sale/maturity of marketable securities	75,622	24,549
Acquisition, net of cash acquired	(56,033)	(8,716)
Payment of deferred leasing cost	(686)
Decrease in restricted cash		430
Net cash provided by (used in) investing activities	94	(9,379)
Cash flows from financing activities
Common stock dividend paid	(5,311)	(5,185)
Net cash used in financing activities	(5,311)	(5,185)
Effects of exchange rate changes on cash and cash equivalents	389	(165)
Net increase (decrease) in cash and cash equivalents	284	(9,620)
Cash and cash equivalents, beginning of period	54,639	58,833
Cash and cash equivalents, end of period	$ 54,923	$ 49,213