Consolidated Statements of Cash Flows (unaudited) (USD $) In Thousands, unless otherwise specified	6 Months Ended
	Mar. 31, 2012	Apr. 02, 2011
Cash flows from operating activities:
Net income	$ 26,696	$ 25,097
Adjustments to reconcile net income to net cash provided by operating activities:
Stock-based compensation	1,818	1,541
Excess tax benefits from stock-based compensation	(648)	(140)
Net periodic pension benefit cost	340	354
Depreciation and amortization	6,447	6,418
Deferred income taxes	131	245
Bad debt provision	758	403
Changes in operating assets and liabilities:
Accounts and unbilled contracts receivable	(8,680)	(8,471)
Inventories	(4,484)	(8,466)
Prepaid expenses	(2,046)	(1,627)
Accounts payable	692	3,404
Accrued payroll and related costs	(6,721)	(6,737)
Advance payments from customers	9,217	9,292
Accrued warranty costs	(799)	(1,205)
Other assets and liabilities	(3,152)	7,325
Net cash provided by operating activities	19,569	27,433
Cash flows from investing activities:
Purchases of property and equipment	(6,703)	(4,740)
Cash flows from financing activities:
Net receipts (repayments) under short-term borrowings	15	(7)
Excess tax benefits from stock-based compensation	648	140
Cash dividends	(7,950)	(6,173)
Proceeds from exercise of stock options and employee stock purchase plan	13,950	10,669
Net cash provided by financing activities	6,663	4,629
Effect of exchange rate on changes in cash	(376)	1,779
Net increase in cash and cash equivalents	19,153	29,101
Cash and cash equivalents, at beginning of period	104,095	76,611
Cash and cash equivalents, at end of period	123,248	105,712
Cash paid during the period for -
Interest	523	688
Income taxes	17,304	444
Non-cash financing activities:
Dividends declared not yet paid	$ 3,905	$ 0