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Income Taxes (Details) - USD ($) $ in Thousands | 6 Months Ended |
--- | --- | ---
Mar. 31, 2016 | Mar. 31, 2015 | Sep. 30, 2015
Income Taxes [Abstract] |  |  |
Effective tax rate | 29.10% | 28.20% |
Federal statutory rate | 35.00% |  |
Unrecognized tax benefits that would impact effective tax rate | $ 3,781 |  | $ 4,086
Total penalties and interest accrued | $ 1,994 |  | $ 2,010
United States - Federal [Member] |  |  |
Open Tax Years By Jurisdiction [Line Items] |  |  |
Years under examination | 2012 and forward |  |
United States - State [Member] |  |  |
Open Tax Years By Jurisdiction [Line Items] |  |  |
Years under examination | 2011 and forward |  |
Canada [Member] |  |  |
Open Tax Years By Jurisdiction [Line Items] |  |  |
Years under examination | 2011 and forward |  |
Europe [Member] |  |  |
Open Tax Years By Jurisdiction [Line Items] |  |  |
Years under examination | 2009 and forward |  |
United Kingdom [Member] |  |  |
Open Tax Years By Jurisdiction [Line Items] |  |  |
Years under examination | 2013 and forward |  |
Australia [Member] |  |  |
Open Tax Years By Jurisdiction [Line Items] |  |  |
Years under examination | 2011 and forward |  |
Asia [Member] |  |  |
Open Tax Years By Jurisdiction [Line Items] |  |  |
Years under examination | 2009 and forward |  |

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- Definition Percentage of current income tax expense (benefit) and deferred income tax expense (benefit) pertaining to continuing operations. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 740 -SubTopic 10 -Section 50 -Paragraph 13 -URI http://asc.fasb.org/extlink&oid=6907707&loc=d3e32698-109319 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 235 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.4-08.(h)(2)) -URI http://asc.fasb.org/extlink&oid=26873400&loc=d3e23780-122690 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 740 -SubTopic 10 -Section 50 -Paragraph 12 -URI http://asc.fasb.org/extlink&oid=6907707&loc=d3e32687-109319 + Details
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- Definition Percentage of domestic federal statutory tax rate applicable to pretax income (loss). + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 740 -SubTopic 10 -Section 50 -Paragraph 12 -URI http://asc.fasb.org/extlink&oid=6907707&loc=d3e32687-109319 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 740 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SAB TOPIC 6.I) -URI http://asc.fasb.org/extlink&oid=34349781&loc=d3e330036-122817 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 740 -SubTopic 10 -Section 50 -Paragraph 13 -URI http://asc.fasb.org/extlink&oid=6907707&loc=d3e32698-109319 + Details
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- Definition Amount accrued for interest on an underpayment of income taxes and penalties related to a tax position claimed or expected to be claimed in the tax return. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 740 -SubTopic 10 -Section 50 -Paragraph 15 -Subparagraph (c) -URI http://asc.fasb.org/extlink&oid=6907707&loc=d3e32718-109319 + Details
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