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SHAREHOLDERS' EQUITY (Tables) | 6 Months Ended
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Mar. 31, 2022
SHAREHOLDERS' EQUITY |
Schedule of change in shareholders' equity | The change in shareholders’ equity for the first three and six months of 2022 and 2021 is shown below (in thousands): ​
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
​ | ​ | Three Months Ended March 31, | ​ | Six Months Ended March 31,
​ |  | 2022 |  | 2021 |  | 2022 |  | 2021
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
Common stock | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
Beginning balance | ​ | ​ | 307 | ​ | 306 | ​ | 307 | ​ | 306
Stock plans | ​ | ​ | — | ​ | — | ​ | — | ​ | —
Ending balance | ​ | ​ | 307 | ​ | 306 | ​ | 307 | ​ | 306
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
Additional paid-in-capital | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
Beginning balance | ​ | ​ | 296,277 | ​ | 294,735 | ​ | 297,644 | ​ | 293,682
Stock plans | ​ | ​ | 2,076 | ​ | 1,061 | ​ | 709 | ​ | 2,114
Ending balance | ​ | ​ | 298,353 | ​ | 295,796 | ​ | 298,353 | ​ | 295,796
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
Retained earnings | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
Beginning balance | ​ | ​ | 840,434 | ​ | 786,563 | ​ | 830,989 | ​ | 775,829
Net earnings common stockholders | ​ | ​ | 16,583 | ​ | 15,404 | ​ | 28,107 | ​ | 28,222
Dividends paid | ​ | ​ | (2,071) | ​ | (2,083) | ​ | (4,150) | ​ | (4,167)
Ending balance | ​ | ​ | 854,946 | ​ | 799,884 | ​ | 854,946 | ​ | 799,884
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
Accumulated other comprehensive income (loss) | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
Beginning balance | ​ | ​ | (4,661) | ​ | 1,692 | ​ | (2,161) | ​ | (3,657)
Foreign currency translation | ​ | ​ | (2,811) | ​ | 116 | ​ | (5,311) | ​ | 5,465
Ending balance | ​ | ​ | (7,472) | ​ | 1,808 | ​ | (7,472) | ​ | 1,808
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
Treasury stock | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
Beginning balance | ​ | ​ | (117,080) | ​ | (107,134) | ​ | (107,083) | ​ | (107,134)
Issued under stock plans | ​ | ​ | (7,881) | ​ | — | ​ | (17,878) | ​ | —
Ending balance | ​ | ​ | (124,961) | ​ | (107,134) | ​ | (124,961) | ​ | (107,134)
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
Total equity | ​ | ​ | 1,021,173 | ​ | 990,660 | ​ | 1,021,173 | ​ | 990,660

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- Definition Tabular disclosure of changes in the separate accounts comprising stockholders' equity (in addition to retained earnings) and of the changes in the number of shares of equity securities during at least the most recent annual fiscal period and any subsequent interim period presented is required to make the financial statements sufficiently informative if both financial position and results of operations are presented. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 505 -SubTopic 10 -Section 50 -Paragraph 2 -URI http://asc.fasb.org/extlink&oid=123467817&loc=d3e21463-112644 + Details
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