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Consolidated Statements of Comprehensive Earnings - USD ($) $ in Thousands | 12 Months Ended
--- | ---
Sep. 30, 2021 | Sep. 30, 2020 | Sep. 30, 2019
Consolidated Statements of Comprehensive Earnings |  |  |
Net earnings | $ 208,649 | $ 240,395 | $ 259,602
Other comprehensive earnings: |  |  |
Foreign currency translation adjustments | 8,628 | 15,668 | (16,554)
Net gain (loss) on foreign currency transactions designated as hedges of net investments in foreign subsidiaries | 592 | (3,199) | 2,682
Taxes on changes on foreign currency translation adjustments | (1,433) | 75 | 476
Foreign currency translation and transactions adjustments, net of tax | 7,787 | 12,544 | (13,396)
Unrealized (loss) gain on fair value adjustment of derivative instruments | (1,672) | (18,262) | 47,759
Reclassification of net realized (gains) losses on derivatives to earnings | 3,702 | (2,134) | 31,446
Taxes on changes on derivative transactions | 234 | 626 | (326)
Derivative adjustments, net of tax | (5,140) | (15,502) | 15,987
Minimum retirement benefit liability adjustments: |  |  |
Net gain (loss) arising during the period | 27,809 | 20,179 | (43,817)
Prior service cost arising during the period | (611) |  | (601)
Amortization of: |  |  |
Prior service cost | 995 | 962 | 704
Net loss | 1,502 | 2,523 | 955
Foreign currency exchange rate changes on minimum retirement benefit liabilities | (855) | (1,672) | 1,318
Taxes on changes on minimum retirement benefit liability adjustments | (7,312) | (5,522) | 10,531
Pension and other postretirement benefit plan adjustments, net of tax | 21,528 | 16,470 | (30,910)
Total comprehensive earnings | $ 232,824 | $ 253,907 | $ 231,283

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