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Pension and Retirement Plans (Detail) - Amounts recognized in the consolidated balance sheet - USD ($) $ in Thousands | Sep. 30, 2016 | Sep. 30, 2015
--- | --- | ---
Defined Benefit Plan Disclosure [Line Items] |  |
Accrued benefit liability | $ (14,022) | $ (10,685)
Deferred tax | (150) | (301)
Accumulated other comprehensive income | 9,124 | 5,561
Net amount recognized | (5,048) | (5,425)
Accumulated benefit obligation | (21,482) | (19,873)
Foreign |  |
Defined Benefit Plan Disclosure [Line Items] |  |
Accrued benefit liability | (11,936) | (8,678)
Deferred tax | (216) | (490)
Accumulated other comprehensive income | 9,001 | 5,623
Net amount recognized | (3,151) | (3,545)
Accumulated benefit obligation | (19,396) | (17,866)
U.S. |  |
Defined Benefit Plan Disclosure [Line Items] |  |
Accrued benefit liability | (2,086) | (2,007)
Deferred tax | 66 | 189
Accumulated other comprehensive income | 123 | (62)
Net amount recognized | (1,897) | (1,880)
Accumulated benefit obligation | (2,086) | (2,007)
Pension |  |
Defined Benefit Plan Disclosure [Line Items] |  |
Accrued benefit liability | (12,765) | (9,700)
Deferred tax | (202) | (466)
Accumulated other comprehensive income | 9,027 | 5,634
Net amount recognized | (3,940) | (4,532)
Accumulated benefit obligation | (20,225) | (18,888)
Pension | Foreign |  |
Defined Benefit Plan Disclosure [Line Items] |  |
Accrued benefit liability | (11,936) | (8,678)
Deferred tax | (216) | (490)
Accumulated other comprehensive income | 9,001 | 5,623
Net amount recognized | (3,151) | (3,545)
Accumulated benefit obligation | (19,396) | (17,866)
Pension | U.S. |  |
Defined Benefit Plan Disclosure [Line Items] |  |
Accrued benefit liability | (829) | (1,022)
Deferred tax | 14 | 24
Accumulated other comprehensive income | 26 | 11
Net amount recognized | (789) | (987)
Accumulated benefit obligation | (829) | (1,022)
Post Retirement |  |
Defined Benefit Plan Disclosure [Line Items] |  |
Accrued benefit liability | (1,257) | (985)
Deferred tax | 52 | 165
Accumulated other comprehensive income | 97 | (73)
Net amount recognized | (1,108) | (893)
Accumulated benefit obligation | (1,257) | (985)
Post Retirement | Foreign |  |
Defined Benefit Plan Disclosure [Line Items] |  |
Accrued benefit liability | 0 | 0
Deferred tax | 0 | 0
Accumulated other comprehensive income | 0 | 0
Net amount recognized | 0 | 0
Accumulated benefit obligation | 0 | 0
Post Retirement | U.S. |  |
Defined Benefit Plan Disclosure [Line Items] |  |
Accrued benefit liability | (1,257) | (985)
Deferred tax | 52 | 165
Accumulated other comprehensive income | 97 | (73)
Net amount recognized | (1,108) | (893)
Accumulated benefit obligation | $ (1,257) | $ (985)

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- Definition Projected Benefit Obligation of defined benefit plans, net of unrealized losses recorded in accumulated comprehensive income + References No definition available. + Details
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- Definition The total of net gain (loss), prior service cost (credit), and transition assets (obligations), as well as minimum pension liability if still remaining, included in accumulated other comprehensive income associated with a defined benefit pension or other postretirement plan(s) because they have yet to be recognized as components of net periodic benefit cost. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 220 -SubTopic 10 -Section 45 -Paragraph 10A -Subparagraph (j-k) -URI http://asc.fasb.org/extlink&oid=36458714&loc=SL7669646-108580 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 220 -SubTopic 10 -Section 45 -Paragraph 11 -URI http://asc.fasb.org/extlink&oid=36458714&loc=d3e637-108580 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 220 -SubTopic 10 -Section 45 -Paragraph 14 -URI http://asc.fasb.org/extlink&oid=36458714&loc=d3e681-108580 Reference 4: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 715 -SubTopic 20 -Section 50 -Paragraph 1 -Subparagraph (i) -URI http://asc.fasb.org/extlink&oid=58740216&loc=d3e1928-114920 Reference 5: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 220 -SubTopic 10 -Section 45 -Paragraph 14A -URI http://asc.fasb.org/extlink&oid=36458714&loc=SL7669686-108580 + Details
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- Definition For defined benefit pension plans, the actuarial present value of benefits (whether vested or nonvested) attributed by the pension benefit formula to employee service rendered before a specified date and based on employee service and compensation (if applicable) before that date. The accumulated benefit obligation differs from the projected benefit obligation in that it includes no assumption about future compensation levels. For plans with flat-benefit or nonpay-related pension benefit formulas, the accumulated benefit obligation and the projected benefit obligation are the same. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Glossary Accumulated Benefit Obligation -URI http://asc.fasb.org/extlink&oid=6503844 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 715 -SubTopic 20 -Section 50 -Paragraph 1 -Subparagraph (e) -URI http://asc.fasb.org/extlink&oid=58740216&loc=d3e1928-114920 + Details
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- Definition The aggregate net amount recognized in the balance sheet associated with the defined benefit plan(s). Will normally be the same as the Defined Benefit Plan, Funded Status of Plan, Total. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 715 -SubTopic 20 -Section 45 -Paragraph 2 -URI http://asc.fasb.org/extlink&oid=21915240&loc=d3e1703-114919 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 715 -SubTopic 20 -Section 50 -Paragraph 1 -Subparagraph (c) -URI http://asc.fasb.org/extlink&oid=58740216&loc=d3e1928-114920 + Details
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