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Retirement Benefits (Tables) | 12 Months Ended
--- | ---
Sep. 30, 2017
Defined Contribution Plan [Member] |
Defined Benefit Plan Disclosure [Line Items] |
Schedule of Costs of Retirement Plans |
﻿ |  |  |  |  |  |  |  |  |
﻿ |  |  |  |  |  |  |  |  |
﻿ |  |  | Year Ended September 30,
﻿ |  | 2017 |  | 2016 |  | 2015
﻿Company costs |  | $ | 32,008 |  | $ | 31,893 |  | $ | 30,933
﻿
Defined Benefit Pension Plan [Member] |
Defined Benefit Plan Disclosure [Line Items] |
Schedule of Net Periodic Benefit Costs |
﻿ |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
﻿ |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
﻿ |  | Year Ended September 30,
﻿ |  | United States |  | Other Countries |  | Total
﻿ |  | 2017 |  | 2016 |  | 2015 |  | 2017 |  | 2016 |  | 2015 |  | 2017 |  | 2016 |  | 2015
﻿Service cost |  | $ | 1,675 |  | $ | 1,695 |  | $ | 2,018 |  | $ | 1,133 |  | $ | 749 |  | $ | 784 |  | $ | 2,808 |  | $ | 2,444 |  | $ | 2,802
﻿Interest cost |  |  | 5,757 |  |  | 5,236 |  |  | 5,956 |  |  | 1,208 |  |  | 1,637 |  |  | 2,128 |  |  | 6,965 |  |  | 6,873 |  |  | 8,084
﻿Expected return on plan assets |  |  | (10,529) |  |  | (10,140) |  |  | (10,647) |  |  | (2,605) |  |  | (2,659) |  |  | (3,032) |  |  | (13,134) |  |  | (12,799) |  |  | (13,679)
﻿Amortization of: |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
﻿Net losses |  |  | 1,854 |  |  | 1,292 |  |  | 396 |  |  | 514 |  |  | 246 |  |  | 190 |  |  | 2,368 |  |  | 1,538 |  |  | 586
﻿Net prior service (benefit) cost |  |  | 383 |  |  | 384 |  |  | 383 |  |  | - |  |  | - |  |  | - |  |  | 383 |  |  | 384 |  |  | 383
﻿Settlement costs |  |  | - |  |  | 47 |  |  | - |  |  | - |  |  | - |  |  | - |  |  | - |  |  | 47 |  |  | -
﻿Net periodic (benefit) cost |  | $ | (860) |  | $ | (1,486) |  | $ | (1,894) |  | $ | 250 |  | $ | (27) |  | $ | 70 |  | $ | (610) |  | $ | (1,513) |  | $ | (1,824)
﻿
Schedule of Changes in Projected Benefit Obligations, Fair Value of Plan Assets, and Funded Status of Plan |
﻿ |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
﻿ |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
﻿ |  | At or for the Year Ended September 30,
﻿ |  | United States |  | Other Countries |  | Total
﻿ |  | 2017 |  | 2016 |  | 2017 |  | 2016 |  | 2017 |  | 2016
﻿Changes in projected benefit obligation: |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
﻿Projected benefit obligation at beginning of year |  | $ | 160,892 |  | $ | 145,870 |  | $ | 72,057 |  | $ | 62,231 |  | $ | 232,949 |  | $ | 208,101
﻿Service cost |  |  | 1,675 |  |  | 1,695 |  |  | 1,133 |  |  | 749 |  |  | 2,808 |  |  | 2,444
﻿Interest cost |  |  | 5,757 |  |  | 5,236 |  |  | 1,208 |  |  | 1,637 |  |  | 6,965 |  |  | 6,873
﻿Net actuarial (gains) losses |  |  | (5,267) |  |  | 17,786 |  |  | (6,188) |  |  | 17,190 |  |  | (11,455) |  |  | 34,976
﻿Contribution by participants |  |  | 55 |  |  | 47 |  |  | 14 |  |  | 20 |  |  | 69 |  |  | 67
﻿Benefits paid |  |  | (5,676) |  |  | (9,789) |  |  | (2,235) |  |  | (2,656) |  |  | (7,911) |  |  | (12,445)
﻿Plan amendments |  |  | 3,694 |  |  | - |  |  | - |  |  | - |  |  | 3,694 |  |  | -
﻿Settlements |  |  | - |  |  | 47 |  |  | - |  |  | - |  |  | - |  |  | 47
﻿Foreign currency exchange rate changes |  |  | - |  |  | - |  |  | 380 |  |  | (7,114) |  |  | 380 |  |  | (7,114)
﻿Projected benefit obligation at end of year |  | $ | 161,130 |  | $ | 160,892 |  | $ | 66,369 |  | $ | 72,057 |  | $ | 227,499 |  | $ | 232,949
﻿ |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
﻿Changes in fair value of plan assets: |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
﻿Fair value of plan assets at beginning of year |  | $ | 145,886 |  | $ | 135,590 |  | $ | 62,926 |  | $ | 60,663 |  | $ | 208,812 |  | $ | 196,253
﻿Actual return on plan assets |  |  | 20,067 |  |  | 19,859 |  |  | 2,542 |  |  | 10,202 |  |  | 22,609 |  |  | 30,061
﻿Contributions by the Company |  |  | - |  |  | 226 |  |  | 671 |  |  | 773 |  |  | 671 |  |  | 999
﻿Contributions by plan participants |  |  | 55 |  |  | 47 |  |  | 14 |  |  | 20 |  |  | 69 |  |  | 67
﻿Benefits paid |  |  | (5,676) |  |  | (9,789) |  |  | (2,235) |  |  | (2,656) |  |  | (7,911) |  |  | (12,445)
﻿Settlements |  |  | - |  |  | (47) |  |  | - |  |  | - |  |  | - |  |  | (47)
﻿Foreign currency exchange rate changes |  |  | - |  |  | - |  |  | 462 |  |  | (6,076) |  |  | 462 |  |  | (6,076)
﻿Fair value of plan assets at end of year |  | $ | 160,332 |  | $ | 145,886 |  | $ | 64,380 |  | $ | 62,926 |  | $ | 224,712 |  | $ | 208,812
﻿Net underfunded status at end of year |  | $ | (798) |  | $ | (15,006) |  | $ | (1,989) |  | $ | (9,131) |  | $ | (2,787) |  | $ | (24,137)
﻿
Schedule of Accumulated Benefit Obligations In Excess of and Less Than Fair Value of Plan Assets |
﻿ |  |  |  |  |  |  |  |  |  |  |  |
﻿ |  |  |  |  |  |  |  |  |  |  |  |
﻿ |  | Plans with accumulated benefit obligation in excess of plan assets |  | Plans with accumulated benefit obligation less than plan assets
﻿ |  | At September 30, |  | At September 30,
﻿ |  | 2017 |  | 2016 |  | 2017 |  | 2016
﻿Projected benefit obligation |  | $ | (82,447) |  | $ | (220,788) |  | $ | (145,052) |  | $ | (12,161)
﻿Accumulated benefit obligation |  |  | (80,759) |  |  | (218,769) |  |  | (144,006) |  |  | (10,924)
﻿Fair value of plan assets |  |  | 77,036 |  |  | 196,800 |  |  | 147,676 |  |  | 12,012
﻿
Schedule of Amounts Recognized in Balance Sheet and Other Comprehensive Income (Loss) |
﻿ |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
﻿ |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
﻿ |  | At or for the Year Ended September 30,
﻿ |  | United States |  | Other Countries |  | Total
﻿ |  | 2017 |  | 2016 |  | 2017 |  | 2016 |  | 2017 |  | 2016
﻿Amounts recognized in statement of financial position consist of: |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
﻿Other non-current assets |  | $ | 1,726 |  | $ | - |  | $ | 897 |  | $ | - |  | $ | 2,623 |  | $ | -
﻿Accrued liabilities |  |  | - |  |  | - |  |  | (3) |  |  | - |  |  | (3) |  |  | -
﻿Other non-current liabilities |  |  | (2,524) |  |  | (15,006) |  |  | (2,883) |  |  | (9,131) |  |  | (5,407) |  |  | (24,137)
﻿Net over/(under)funded status at end of year |  | $ | (798) |  | $ | (15,006) |  | $ | (1,989) |  | $ | (9,131) |  | $ | (2,787) |  | $ | (24,137)
﻿ |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
﻿Amounts recognized in accumulated other comprehensive income consist of: |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
﻿Unrecognized net prior service (benefit) cost |  | $ | 7,169 |  | $ | 3,857 |  | $ | - |  | $ | - |  | $ | 7,169 |  | $ | 3,857
﻿Unrecognized net (gains) losses |  |  | 17,023 |  |  | 33,682 |  |  | 14,198 |  |  | 20,795 |  |  | 31,221 |  |  | 54,477
﻿Total amounts recognized |  |  | 24,192 |  |  | 37,539 |  |  | 14,198 |  |  | 20,795 |  |  | 38,390 |  |  | 58,334
﻿Deferred taxes |  |  | (9,224) |  |  | (14,305) |  |  | (5,016) |  |  | (7,303) |  |  | (14,240) |  |  | (21,608)
﻿Amounts recognized in accumulated other comprehensive income |  | $ | 14,968 |  | $ | 23,234 |  | $ | 9,182 |  | $ | 13,492 |  | $ | 24,150 |  | $ | 36,726
﻿
Schedule of Changes in Plan Assets and Benefit Obligations Recorded in Other Comprehensive Income (Loss) |
﻿ |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
﻿ |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
﻿ |  | Year Ended September 30,
﻿ |  | United States |  | Other Countries |  | Total
﻿ |  | 2017 |  | 2016 |  | 2017 |  | 2016 |  | 2017 |  | 2016
﻿Accumulated other comprehensive losses at beginning of year |  | $ | 37,539 |  | $ | 31,102 |  | $ | 20,795 |  | $ | 13,618 |  | $ | 58,334 |  | $ | 44,720
﻿Net (gain) loss |  |  | (14,805) |  |  | 8,160 |  |  | (6,125) |  |  | 9,646 |  |  | (20,930) |  |  | 17,806
﻿Loss due to settlement or curtailment arising during the period |  |  | - |  |  | (47) |  |  | - |  |  | - |  |  | - |  |  | (47)
﻿Amortization of: |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
﻿Net losses |  |  | (1,854) |  |  | (1,292) |  |  | (515) |  |  | (246) |  |  | (2,369) |  |  | (1,538)
﻿Prior service benefit (cost) |  |  | 3,312 |  |  | (384) |  |  | - |  |  | - |  |  | 3,312 |  |  | (384)
﻿Foreign currency exchange rate changes |  |  | - |  |  | - |  |  | 43 |  |  | (2,223) |  |  | 43 |  |  | (2,223)
﻿Accumulated other comprehensive losses at end of year |  | $ | 24,192 |  | $ | 37,539 |  | $ | 14,198 |  | $ | 20,795 |  | $ | 38,390 |  | $ | 58,334
﻿
Schedule of Amounts Expected to be Amortized from Accumulated Other Comprehensive Income (Loss) and Reported as a Component of Net Periodic Benefit Cost During the Next Fiscal Year |
﻿ |  |  |  |  |  |  |  |  |
﻿ |  |  |  |  |  |  |  |  |
﻿ |  | United States |  | Other Countries |  | Total
﻿Prior service cost |  | $ | 709 |  | $ | - |  | $ | 709
﻿Net actuarial losses |  |  | 598 |  |  | 290 |  |  | 888
﻿
Schedule of Expected Benefit Payments |
﻿ |  |  |  |  |  |  |  |  |
﻿ |  |  |  |  |  |  |  |  |
﻿Year Ending September 30, |  | United States |  | Other Countries |  | Total
﻿2018 |  | $ | 6,251 |  | $ | 2,225 |  | $ | 8,476
﻿2019 |  |  | 6,911 |  |  | 2,578 |  |  | 9,489
﻿2020 |  |  | 7,521 |  |  | 2,183 |  |  | 9,704
﻿2021 |  |  | 8,065 |  |  | 2,396 |  |  | 10,461
﻿2022 |  |  | 8,524 |  |  | 2,257 |  |  | 10,781
﻿2023 – 2027 |  |  | 48,075 |  |  | 12,802 |  |  | 60,877
﻿
Schedule of Allocation of Plan Assets, Actual and Target Allocations |
﻿ |  |  |  |  |  |  |  |  |  |  |  |
﻿ |  |  |  |  |  |  |  |  |  |  |  |
﻿ |  | At September 30,
﻿ |  | 2017 |  | 2016
﻿ |  | Percentage of Plan Assets |  | Target Allocation Ranges |  | Percentage of Plan Assets |  | Target Allocation Ranges
﻿United States: |  |  |  |  |  |  |  |  |  |  |  |
﻿Asset Class |  |  |  |  |  |  |  |  |  |  |  |
﻿Equity Securities |  | 64.6% |  | 41.2% | - | 81.2% |  | 56.4% |  | 40.8% | - | 80.8%
﻿Debt Securities |  | 35.2% |  | 28.8% | - | 48.8% |  | 39.0% |  | 29.2% | - | 49.2%
﻿Other |  | 0.2% |  | 0.0% |  | 4.6% |  | 0.0%
﻿ |  | 100.0% |  |  |  |  |  | 100.0% |  |  |  |
﻿United Kingdom: |  |  |  |  |  |  |  |  |  |  |  |
﻿Asset Class |  |  |  |  |  |  |  |  |  |  |  |
﻿Equity Securities |  | 46.1% |  | 30.0% | - | 60.0% |  | 34.7% |  | 25.0% | - | 45.0%
﻿Debt Securities |  | 53.8% |  | 45.0% | - | 70.0% |  | 65.2% |  | 40.0% | - | 80.0%
﻿Other |  | 0.1% |  | 0.0% |  | 0.1% |  | 0.0%
﻿ |  | 100.0% |  |  |  |  |  | 100.0% |  |  |  |
﻿Japan: |  |  |  |  |  |  |  |  |  |  |  |
﻿Asset Class |  |  |  |  |  |  |  |  |  |  |  |
﻿Equity Securities |  | 41.0% |  | 36.0% | - | 44.0% |  | 40.0% |  | 36.0% | - | 44.0%
﻿Debt Securities |  | 58.1% |  | 55.0% | - | 63.0% |  | 59.1% |  | 55.0% | - | 63.0%
﻿Other |  | 0.9% |  | 0.0% | - | 2.0% |  | 0.9% |  | 0.0% | - | 2.0%
﻿ |  | 100.0% |  |  |  |  |  | 100.0% |  |  |  |
﻿
Schedule of Allocation of Plan Assets, Fair Value Hierarchy |
﻿ |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
﻿ |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
﻿ |  | At September 30, 2017
﻿ |  | Level 1 |  | Level 2 |  | Level 3 |  |  |
﻿ |  | United States |  | Other Countries |  | United States |  | Other Countries |  | United States |  | Other Countries |  | Total
﻿Asset Category: |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
﻿Cash and cash equivalents |  | $ | 291 |  | $ | 167 |  | $ | - |  | $ | - |  | $ | - |  | $ | - |  | $ | 458
﻿Mutual funds: |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
﻿U.S. corporate bond fund |  |  | 56,388 |  |  | - |  |  | - |  |  | - |  |  | - |  |  | - |  |  | 56,388
﻿U.S. equity large cap fund |  |  | 54,140 |  |  | - |  |  | - |  |  | - |  |  | - |  |  | - |  |  | 54,140
﻿International equity large cap growth fund |  |  | 49,513 |  |  | - |  |  | - |  |  | - |  |  | - |  |  | - |  |  | 49,513
﻿Pooled funds: |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
﻿Japanese equity securities |  |  | - |  |  | - |  |  | - |  |  | 2,487 |  |  | - |  |  | - |  |  | 2,487
﻿International equity securities |  |  | - |  |  | - |  |  | - |  |  | 2,260 |  |  | - |  |  | - |  |  | 2,260
﻿Japanese fixed income securities |  |  | - |  |  | - |  |  | - |  |  | 4,987 |  |  | - |  |  | - |  |  | 4,987
﻿International fixed income securities |  |  | - |  |  | - |  |  | - |  |  | 1,730 |  |  | - |  |  | - |  |  | 1,730
﻿Global target return equity/bond fund |  |  | - |  |  | - |  |  | - |  |  | 13,103 |  |  | - |  |  | - |  |  | 13,103
﻿Index linked U.K. equity fund |  |  | - |  |  | - |  |  | - |  |  | 4,940 |  |  | - |  |  | - |  |  | 4,940
﻿Index linked international equity fund |  |  | - |  |  | - |  |  | - |  |  | 6,285 |  |  | - |  |  | - |  |  | 6,285
﻿Index linked U.K. corporate bonds fund |  |  | - |  |  | - |  |  | - |  |  | 16,540 |  |  | - |  |  | - |  |  | 16,540
﻿Index linked U.K. government securities fund |  |  | - |  |  | - |  |  | - |  |  | 4,980 |  |  | - |  |  | - |  |  | 4,980
﻿Index linked U.K. long-term government securities fund |  |  | - |  |  | - |  |  | - |  |  | 6,901 |  |  | - |  |  | - |  |  | 6,901
﻿Total assets |  | $ | 160,332 |  | $ | 167 |  | $ | - |  | $ | 64,213 |  | $ | - |  | $ | - |  | $ | 224,712
﻿ |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
﻿ |  | At September 30, 2016
﻿ |  | Level 1 |  | Level 2 |  | Level 3 |  |  |
﻿ |  | United States |  | Other Countries |  | United States |  | Other Countries |  | United States |  | Other Countries |  | Total
﻿Asset Category: |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
﻿Cash and cash equivalents |  | $ | 6,741 |  | $ | 163 |  | $ | - |  | $ | - |  | $ | - |  | $ | - |  | $ | 6,904
﻿Mutual funds: |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
﻿U.S. corporate bond fund |  |  | 56,813 |  |  | - |  |  | - |  |  | - |  |  | - |  |  | - |  |  | 56,813
﻿U.S. equity large cap fund |  |  | 48,506 |  |  | - |  |  | - |  |  | - |  |  | - |  |  | - |  |  | 48,506
﻿International equity large cap growth fund |  |  | 33,834 |  |  | - |  |  | - |  |  | - |  |  | - |  |  | - |  |  | 33,834
﻿Pooled funds: |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
﻿Japanese equity securities |  |  | - |  |  | - |  |  | - |  |  | 2,536 |  |  | - |  |  | - |  |  | 2,536
﻿International equity securities |  |  | - |  |  | - |  |  | - |  |  | 2,258 |  |  | - |  |  | - |  |  | 2,258
﻿Japanese fixed income securities |  |  | - |  |  | - |  |  | - |  |  | 5,321 |  |  | - |  |  | - |  |  | 5,321
﻿International fixed income securities |  |  | - |  |  | - |  |  | - |  |  | 1,777 |  |  | - |  |  | - |  |  | 1,777
﻿Index linked U.K. equity fund |  |  | - |  |  | - |  |  | - |  |  | 7,982 |  |  | - |  |  | - |  |  | 7,982
﻿Index linked international equity fund |  |  | - |  |  | - |  |  | - |  |  | 9,694 |  |  | - |  |  | - |  |  | 9,694
﻿Index linked U.K. corporate bonds fund |  |  | - |  |  | - |  |  | - |  |  | 16,180 |  |  | - |  |  | - |  |  | 16,180
﻿Index linked U.K. government securities fund |  |  | - |  |  | - |  |  | - |  |  | 5,009 |  |  | - |  |  | - |  |  | 5,009
﻿Index linked U.K. long-term government securities fund |  |  | - |  |  | - |  |  | - |  |  | 11,998 |  |  | - |  |  | - |  |  | 11,998
﻿Total assets |  | $ | 145,894 |  | $ | 163 |  | $ | - |  | $ | 62,755 |  | $ | - |  | $ | - |  | $ | 208,812
﻿
Other Postretirement Benefit Plans [Member] |
Defined Benefit Plan Disclosure [Line Items] |
Schedule of Actuarial Assumptions Used |
﻿ |  |  |  |  |  |  |  |
﻿ |  |  |  |  |  |  |  |
﻿ | 2017 |  | 2016 |  | 2015
﻿Weighted-average discount rate used to determine benefit obligation at September 30 | 3.78 | % |  | 3.63 | % |  | 4.01 | %
﻿Weighted-average discount rate used to determine net periodic benefit cost for years ended September 30 | 3.63 |  |  | 4.01 |  |  | 4.40 |
﻿
Schedule of Net Periodic Benefit Costs |
﻿ |  |  |  |  |  |  |  |  |
﻿ |  |  |  |  |  |  |  |  |
﻿ |  | Year Ended September 30,
﻿ |  | 2017 |  | 2016 |  | 2015
﻿Service cost |  | $ | 14 |  | $ | 22 |  | $ | 30
﻿Interest cost |  |  | 1,244 |  |  | 1,048 |  |  | 1,233
﻿Amortization of: |  |  |  |  |  |  |  |  |
﻿Net (gains) losses |  |  | 201 |  |  | 156 |  |  | (73)
﻿Net prior service benefit |  |  | (158) |  |  | (158) |  |  | (158)
﻿Net periodic cost |  | $ | 1,301 |  | $ | 1,068 |  | $ | 1,032
﻿
Schedule of Changes in Projected Benefit Obligations, Fair Value of Plan Assets, and Funded Status of Plan |
﻿ |  |  |  |  |  |
﻿ |  |  |  |  |  |
﻿ |  | Year Ended September 30,
﻿ |  | 2017 |  | 2016
﻿Changes in accumulated postretirement benefit obligation: |  |  |  |  |  |
﻿Accumulated postretirement benefit obligation at beginning of year |  | $ | 35,630 |  | $ | 34,927
﻿Service cost |  |  | 14 |  |  | 22
﻿Interest cost |  |  | 1,244 |  |  | 1,048
﻿Premiums paid by plan participants |  |  | 1,365 |  |  | 1,299
﻿Net actuarial (gains) losses |  |  | (2,049) |  |  | 1,912
﻿Benefits paid |  |  | (3,964) |  |  | (3,503)
﻿Foreign currency exchange rate changes |  |  | 12 |  |  | (75)
﻿Accumulated postretirement benefit obligation at end of year |  | $ | 32,252 |  | $ | 35,630
﻿Changes in fair value of plan assets: |  |  |  |  |  |
﻿Fair value of plan assets at beginning of year |  | $ | - |  | $ | -
﻿Contributions by the company |  |  | 2,599 |  |  | 2,204
﻿Premiums paid by plan participants |  |  | 1,365 |  |  | 1,299
﻿Benefits paid |  |  | (3,964) |  |  | (3,503)
﻿ Fair value of plan assets at end of year |  | $ | - |  | $ | -
﻿Funded status at end of year |  | $ | (32,252) |  | $ | (35,630)
﻿
Schedule of Amounts Recognized in Balance Sheet and Other Comprehensive Income (Loss) |
﻿ |  |  |  |  |  |
﻿ |  |  |  |  |  |
﻿ |  | Year Ended September 30,
﻿ |  | 2017 |  | 2016
﻿Amounts recognized in statement of financial position consist of: |  |  |  |  |  |
﻿Accrued liabilities |  | $ | (2,410) |  | $ | (2,505)
﻿Other non-current liabilities |  |  | (29,842) |  |  | (33,125)
﻿Funded status at end of year |  | $ | (32,252) |  | $ | (35,630)
﻿ |  |  |  |  |  |
﻿Amounts recognized in accumulated other comprehensive income consist of: |  |  |  |  |  |
﻿Unrecognized net prior service benefit |  | $ | (160) |  | $ | (318)
﻿Unrecognized net losses |  |  | 3,234 |  |  | 5,484
﻿Total amounts recognized |  |  | 3,074 |  |  | 5,166
﻿Deferred taxes |  |  | (1,183) |  |  | (1,979)
﻿Amounts recognized in accumulated other comprehensive income |  | $ | 1,891 |  | $ | 3,187
﻿
Schedule of Changes in Plan Assets and Benefit Obligations Recorded in Other Comprehensive Income (Loss) |
﻿ |  |  |  |  |  |
﻿ |  |  |  |  |  |
﻿ |  | Year Ended September 30,
﻿ |  | 2017 |  | 2016
﻿Accumulated other comprehensive losses at beginning of year |  | $ | 5,166 |  | $ | 3,268
﻿Net (gain) loss |  |  | (2,049) |  |  | 1,912
﻿Amortization of: |  |  |  |  |  |
﻿Net losses |  |  | (201) |  |  | (156)
﻿Prior service benefit |  |  | 158 |  |  | 158
﻿Foreign currency exchange rate changes |  |  | - |  |  | (16)
﻿Accumulated other comprehensive losses at end of year |  | $ | 3,074 |  | $ | 5,166
﻿
Schedule of Health Care Cost Trend Rates |
﻿ |  |  |  |  |  |  |  |
﻿ |  |  |  |  |  |  |  |
﻿ |  |  |  | 2017 |  | 2016
﻿Health care cost trend rate assumed for next year |  |  |  | 6.75 | % |  | 7.00 | %
﻿Rate to which the cost trend rate is assumed to decline |  |  |  |  |  |  |  |
﻿(the ultimate trend rate) |  |  |  | 5.00 | % |  | 5.00 | %
﻿Year that the rate reaches the ultimate trend rate |  |  |  | 2025 |  |  | 2025 |
﻿
Schedule of Health Care Costs Sensitivity |
﻿ |  |  |  |  |  |  |
﻿ |  |  |  |  |  |  |
﻿ |  |  | Change In Health Care Cost Trend Rate
﻿ |  |  | 1% increase |  | 1% decrease
﻿Effect on projected fiscal year 2018 service and interest cost |  |  | $ | 113 |  | $ | (99)
﻿Effect on accumulated postretirement benefit obligation at September 30, 2017 |  |  |  | 2,960 |  |  | (2,605)
﻿
Schedule of Future Postretirement Company Contributions |
﻿ |  |  |
﻿ |  |  |
﻿Year Ending September 30, |  |  |
﻿2018 |  | $ | 3,871
﻿2019 |  |  | 3,890
﻿2020 |  |  | 3,871
﻿2021 |  |  | 3,852
﻿2022 |  |  | 3,818
﻿2023 – 2027 |  |  | 17,812
﻿
Multiemployer Plans, Pension [Member] |
Defined Benefit Plan Disclosure [Line Items] |
Schedule of Costs of Retirement Plans |
﻿ |  |  |  |  |  |  |  |  |
﻿ |  |  |  |  |  |  |  |  |
﻿ |  |  | Year Ended September 30,
﻿ |  | 2017 |  | 2016 |  | 2015
﻿Company contributions |  | $ | 292 |  | $ | 475 |  | $ | 600
﻿
UNITED STATES | Defined Benefit Pension Plan [Member] |
Defined Benefit Plan Disclosure [Line Items] |
Schedule of Actuarial Assumptions Used |
﻿ |  |  |  |  |  |  |  |
﻿ |  |  |  |  |  |  |  |
﻿ | 2017 |  | 2016 |  | 2015
﻿United States: |  |  |  |  |  |  |  |
﻿Weighted-average assumptions to determine benefit obligation at September 30: |  |  |  |  |  |  |  |
﻿Discount rate | 3.80 | % |  | 3.65 | % |  | 4.39 | %
﻿Weighted-average assumptions to determine periodic benefit costs for years ended September 30: |  |  |  |  |  |  |  |
﻿Discount rate | 3.65 |  |  | 4.39 |  |  | 4.40 |
﻿Long-term rate of return on plan assets | 7.38 |  |  | 7.62 |  |  | 7.62 |
﻿
UNITED KINGDOM | Defined Benefit Pension Plan [Member] |
Defined Benefit Plan Disclosure [Line Items] |
Schedule of Actuarial Assumptions Used |
﻿ |  |  |  |  |  |  |  |
﻿ |  |  |  |  |  |  |  |
﻿ | 2017 |  | 2016 |  | 2015
﻿United Kingdom: |  |  |  |  |  |  |  |
﻿Weighted-average assumptions to determine benefit obligation at September 30: |  |  |  |  |  |  |  |
﻿Discount rate | 2.56 | % |  | 2.28 | % |  | 3.75 | %
﻿Rate of compensation increase | 3.60 |  |  | 3.40 |  |  | 3.40 |
﻿Weighted-average assumptions to determine periodic benefit costs for years ended September 30: |  |  |  |  |  |  |  |
﻿Discount rate - service cost | 2.33 |  |  | 3.86 |  |  | 4.10 |
﻿Discount rate - interest cost | 2.24 |  |  | 3.63 |  |  | 4.10 |
﻿Rate of compensation increase | 3.40 |  |  | 3.40 |  |  | 3.50 |
﻿Long-term rate of return on plan assets | 4.75 |  |  | 5.00 |  |  | 5.50 |
﻿
JAPAN | Defined Benefit Pension Plan [Member] |
Defined Benefit Plan Disclosure [Line Items] |
Schedule of Actuarial Assumptions Used |
﻿ |  |  |  |  |  |  |  |
﻿ |  |  |  |  |  |  |  |
﻿ | 2017 |  | 2016 |  | 2015
﻿Japan: |  |  |  |  |  |  |  |
﻿Weighted-average assumptions to determine benefit obligation at September 30: |  |  |  |  |  |  |  |
﻿Discount rate | 0.58 | % |  | 0.46 | % |  | 0.97 | %
﻿Rate of compensation increase | 2.00 |  |  | 2.02 |  |  | 2.00 |
﻿Weighted-average assumptions to determine periodic benefit costs for years ended September 30: |  |  |  |  |  |  |  |
﻿Discount rate - service cost | 0.59 |  |  | 1.27 |  |  | 1.10 |
﻿Discount rate - interest cost | 0.45 |  |  | 0.59 |  |  | 1.10 |
﻿Rate of compensation increase | 2.02 |  |  | 2.00 |  |  | 2.00 |
﻿Long-term rate of return on plan assets | 2.50 |  |  | 3.00 |  |  | 3.00 |
﻿

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