CONSOLIDATED STATEMENTS OF CASH FLOWS - USD ($) $ in Thousands	9 Months Ended
	Jun. 30, 2015	Jun. 30, 2014
Cash flows from operating activities
Net income	$ 7,658	$ 31,260
Adjustments to reconcile net income to net cash provided by operating activities:
Depreciation and amortization	18,929	17,252
Impairment of intangible assets	0	398
Impairment of other assets	0	2,621
Stock-based compensation	9,510	8,774
Amortization of premium on marketable securities	917	896
Undistributed losses (earnings) of equity method investments	313	(1,330)
Deferred income tax provision (benefit)	(2,262)	1,115
Gain on disposal of businesses	0	(27,444)
(Gain) loss on disposal of long-lived assets	(4)	52
Changes in operating assets and liabilities, net of acquisitions and disposals:
Accounts receivable	(19,070)	10,416
Inventories	(1,519)	1,150
Prepaid expenses and other current assets	(4,881)	(3,612)
Accounts payable	11,600	(15,712)
Deferred revenue	(2,339)	13,243
Accrued warranty and retrofit costs	(320)	(820)
Accrued compensation and benefits	(1,907)	5,484
Accrued restructuring costs	(660)	2,542
Accrued expenses and other current liabilities	5,506	(5,947)
Net cash provided by operating activities	21,471	40,338
Cash flows from investing activities
Purchases of property, plant and equipment	(5,945)	(3,384)
Purchases of marketable securities	(58,991)	(128,135)
Sales and maturities of marketable securities	74,515	89,579
Proceeds from divestitures	0	85,369
Acquisitions, net of cash acquired	(17,257)	(37,832)
Proceeds from sales of property, plant and equipment	6	0
Purchases of other investments	(5,000)	0
Decreases in restricted cash	0	177
Net cash (used in) provided by investing activities	(12,672)	5,774
Cash flows from financing activities
Proceeds from issuance of common stock, net of issuance costs	867	967
Principal repayments of capital lease obligations	(368)	0
Common stock dividends paid	(20,229)	(16,144)
Net cash used in financing activities	(19,730)	(15,177)
Effects of exchange rate changes on cash and cash equivalents	(3,513)	1,641
Net (decrease) increase in cash and cash equivalents	(14,444)	32,576
Cash and cash equivalents, beginning of period	94,114	82,971
Cash and cash equivalents, end of period	79,670	115,547
Supplemental disclosure of non-cash investing and financing activities:
Acquisition of buildings and land through capital lease	$ 0	$ 8,537