CONSOLIDATED STATEMENTS OF CASH FLOWS - USD ($) $ in Thousands	12 Months Ended
	Sep. 30, 2015	Sep. 30, 2014	Sep. 30, 2013
Operating Activities:
Net income	$ 22,914	$ 69,580	$ 25,269
Adjustments to reconcile net income to net cash provided by (used in) operating activities:
Depreciation and amortization	37,662	30,440	25,359
Stock-based compensation expense	8,325	5,625	3,251
Change in fair value of contingent consideration	3,607
Inventory write-down		598	2,760
Impairment of goodwill	0		50,865
Deferred income taxes	33,816	2,684	(7,508)
Excess tax benefits from equity incentive plans	33	(310)
Changes in operating assets and liabilities, net of effects from acquisitions:
Accounts receivable	(2,230)	(4,300)	(18,991)
Inventories	(21,669)	20,590	(19,890)
Prepaid expenses and other current assets	(18,269)	(8,114)	3,867
Long-term capitalized contract costs	3,192	(7,246)	(42,088)
Accounts payable and other current liabilities	25,599	6,505	(25,637)
Customer advances	(10,200)	7,304	8,990
Income taxes	8,847	(9,768)	(19,114)
Other items, net	(1,938)	1,222	(409)
NET CASH PROVIDED BY (USED IN) OPERATING ACTIVITIES	89,689	114,810	(13,276)
Investing Activities:
Acquisition of businesses, net of cash acquired	(92,178)	(83,456)	(63,691)
Purchases of marketable securities	(58,855)	(25,557)	(4,050)
Proceeds from sales or maturities of marketable securities	51,173	4,050
Purchases of property, plant and equipment	(22,202)	(16,620)	(9,052)
Purchases of other assets	(2,993)
NET CASH USED IN INVESTING ACTIVITIES	(125,055)	(121,583)	(76,793)
Financing Activities:
Proceeds from short-term borrowings	111,300	38,000	70,000
Principal payments on short-term borrowings	(51,300)	(38,000)	(70,000)
Proceeds from long-term borrowings	25,000		100,000
Principal payments on long-term borrowings	(537)	(573)	(8,543)
Proceeds from issuance of common stock		113
Purchase of common stock	(2,652)	(1,204)
Excess tax benefits from equity incentive plans	(33)	310
Contingent consideration payments related to acquisitions of businessess		(2,368)	(7,842)
Purchase of noncontrolling interest	(1,029)
Net change in restricted cash	(189)	325	(158)
Dividends paid to shareholders	(7,256)	(6,429)	(6,417)
NET CASH PROVIDED BY (USED IN) FINANCING ACTIVITIES	73,304	(9,826)	77,040
Effect of exchange rates on cash	(10,950)	4,195	4,654
NET INCREASE (DECREASE) IN CASH AND CASH EQUIVALENTS	26,988	(12,404)	(8,375)
Cash and cash equivalents at the beginning of the year	191,488	203,892	212,267
CASH AND CASH EQUIVALENTS AT THE END OF THE YEAR	218,476	191,488	203,892
NEK Special Programs Group LLC (NEK)
Operating Activities:
Net income		(600)	(500)
Supplemental disclosure of non-cash investing and financing activities:
Liability incurred to acquire, net			$ 4,490
DTECH LABS, Inc.
Operating Activities:
Net income	(500)
Supplemental disclosure of non-cash investing and financing activities:
Liability incurred to acquire, net	11,808
Intific Inc.
Operating Activities:
Net income	$ (1,800)	(4,200)
Supplemental disclosure of non-cash investing and financing activities:
Liability incurred to acquire, net		$ 1,173