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Acquisitions (Narrative) (Details) $ in Thousands | 12 Months Ended |  |
--- | --- | --- | ---
Sep. 30, 2018 USD ($) | Sep. 30, 2017 USD ($) | Sep. 30, 2016 USD ($) employee | Jan. 12, 2016 USD ($) | Nov. 03, 2015 USD ($)
Acquisition-related cost | $ 500 | $ 1,600 | $ 3,500 |  |
Payments to Acquire Businesses, Net of Cash Acquired | 3,000 | 4,960 | 165,802 |  |
Goodwill acquired | 4,350 | 2,847 |  |  |
Revenue, Net | 1,241,824 | 1,164,039 | 1,140,533 |  |
Costs and Expenses | $ 842,393 | 794,122 | 851,882 |  |
Kepware [Member] |  |  |  |  |
Payments to Acquire Businesses, Net of Cash Acquired |  |  | 99,410 |  |
Acquisition of businesses, net cash acquired |  |  | 590 |  |
Goodwill acquired |  |  | 77,081 |  |
Finite-lived Intangible Assets Acquired |  |  | 34,500 |  |
Business acquisition, acquired net assets excluding goodwill, intangible assets and cash |  |  | 4,729 |  |
Business Combination, Contingent Consideration Arrangements, Change in Range of Outcomes, Contingent Consideration, Liability, Value, Low |  |  | 16,900 |  |
Revenue, Net |  |  | 16,000 |  |
Costs and Expenses |  |  | 15,000 |  |
Vuforia [Member] |  |  |  |  |
Payments to Acquire Businesses, Net of Cash Acquired |  |  | 64,777 |  |
Acquisition of businesses, net cash acquired |  |  | 4,466 |  |
Goodwill acquired |  |  | 23,316 |  |
Finite-lived Intangible Assets Acquired |  |  | 41,200 |  |
Business acquisition, acquired net assets excluding goodwill, intangible assets and cash |  |  | $ 261 |  |
Weighted average useful lives of acquired intangible assets |  |  | 6 years |  |
Business Combination, Contingent Consideration Arrangements, Change in Range of Outcomes, Contingent Consideration, Liability, Value, Low |  |  | $ 0 |  |
Number of employees in acquired entity | employee |  |  | 80 |  |
Purchased Software [Member] |  |  |  |  |
Weighted average useful lives of acquired intangible assets | 9 years |  |  |  |
Purchased Software [Member] | Kepware [Member] |  |  |  |  |
Finite-lived Intangible Assets Acquired |  |  | $ 28,700 |  |
Weighted average useful lives of acquired intangible assets |  |  | 10 years |  |
Customer Lists [Member] |  |  |  |  |
Weighted average useful lives of acquired intangible assets | 10 years |  |  |  |
Customer Lists [Member] | Kepware [Member] |  |  |  |  |
Finite-lived Intangible Assets Acquired |  |  | $ 5,200 |  |
Weighted average useful lives of acquired intangible assets |  |  | 10 years |  |
Trademarks and Trade Names [Member] | Kepware [Member] |  |  |  |  |
Finite-lived Intangible Assets Acquired |  |  | $ 600 |  |
Weighted average useful lives of acquired intangible assets |  |  | 6 years |  |
Trademarks [Member] |  |  |  |  |
Weighted average useful lives of acquired intangible assets | 11 years |  |  |  |
Line of Credit [Member] |  |  |  |  |
Credit facility, borrowings outstanding | $ 148,125 | $ 218,125 |  |  |
Line of Credit [Member] | Kepware [Member] |  |  |  |  |
Credit facility, borrowings outstanding |  |  |  | $ 100,000 |
Line of Credit [Member] | Vuforia [Member] |  |  |  |  |
Credit facility, borrowings outstanding |  |  |  |  | $ 50,000

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- Definition Weighted average amortization period of finite-lived intangible assets acquired either individually or as part of a group of assets, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 350 -SubTopic 30 -Section 50 -Paragraph 1 -Subparagraph (a)(3) -URI http://asc.fasb.org/extlink&oid=66006027&loc=d3e16265-109275 + Details
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- Definition This element represents acquisition-related costs incurred to effect a business combination which costs have been expensed during the period. Such costs include finder's fees; advisory, legal, accounting, valuation, and other professional or consulting fees; general administrative costs, including the costs of maintaining an internal acquisitions department; and may include costs of registering and issuing debt and equity securities. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 805 -SubTopic 10 -Section 25 -Paragraph 23 -URI http://asc.fasb.org/extlink&oid=84229725&loc=d3e1043-128460 + Details
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- Definition This element represents the amount of any change recognized during the period in the low-end of the estimated range of outcomes (undiscounted) of a liability assumed in a business combination arising from an item of contingent consideration. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 805 -SubTopic 30 -Section 50 -Paragraph 4 -Subparagraph (a)(2) -URI http://asc.fasb.org/extlink&oid=35744584&loc=d3e7008-128479 + Details
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- Definition The cash inflow associated with the acquisition of business during the period (for example, cash that was held by the acquired business). + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 12 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=98514028&loc=d3e3179-108585 + Details
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- Definition Total costs of sales and operating expenses for the period. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 225 -SubTopic 10 -Section S99 -Paragraph 2 -Subparagraph (SX 210.5-03) -URI http://asc.fasb.org/extlink&oid=63488584&loc=d3e20235-122688 + Details
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- Definition Amount of increase in asset representing future economic benefits arising from other assets acquired in a business combination that are not individually identified and separately recognized resulting from a business combination. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 350 -SubTopic 20 -Section 50 -Paragraph 1 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=35741047&loc=d3e13816-109267 + Details
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- Definition The carrying value as of the balance sheet date of the current and noncurrent portions of long-term obligations drawn from a line of credit, which is a bank's commitment to make loans up to a specific amount. Examples of items that might be included in the application of this element may consist of letters of credit, standby letters of credit, and revolving credit arrangements, under which borrowings can be made up to a maximum amount as of any point in time conditional on satisfaction of specified terms before, as of and after the date of drawdowns on the line. Includes short-term obligations that would normally be classified as current liabilities but for which (a) postbalance sheet date issuance of a long term obligation to refinance the short term obligation on a long term basis, or (b) the enterprise has entered into a financing agreement that clearly permits the enterprise to refinance the short-term obligation on a long term basis and the following conditions are met (1) the agreement does not expire within 1 year and is not cancelable by the lender except for violation of an objectively determinable provision, (2) no violation exists at the BS date, and (3) the lender has entered into the financing agreement is expected to be financially capable of honoring the agreement. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02(22)) -URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 944 -SubTopic 210 -Section S99 -Paragraph 1 -Subparagraph (SX 210.7-03(16)) -URI http://asc.fasb.org/extlink&oid=6879938&loc=d3e572229-122910 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 942 -SubTopic 210 -Section S99 -Paragraph 1 -Subparagraph (SX 210.9-03(16)) -URI http://asc.fasb.org/extlink&oid=6876686&loc=d3e534808-122878 + Details
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- Definition The cash outflow associated with the acquisition of a business, net of the cash acquired from the purchase. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 13 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=98514028&loc=d3e3213-108585 + Details
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