Fair Value Measurements - Assets and Liabilities Measured at Fair Value on Recurring Basis (Details) - Fair Value, Measurements, Recurring - USD ($) $ in Thousands	Apr. 30, 2025	Jan. 31, 2025	Apr. 30, 2024
Assets:
Total assets measured at fair value	$ 88,345	$ 88,822	$ 83,162
Liabilities:
Total liabilities measured at fair value	50,896	54,553	49,790
Level 1
Assets:
Total assets measured at fair value	50,667	54,496	50,054
Liabilities:
Total liabilities measured at fair value	49,633	53,442	49,093
Level 2
Assets:
Total assets measured at fair value	1,255	13	112
Liabilities:
Total liabilities measured at fair value	1,263	1,111	697
Level 3
Assets:
Total assets measured at fair value	36,423	34,313	32,996
Liabilities:
Total liabilities measured at fair value	0	0	0
Other Current Assets | Available-for-sale securities
Assets:
Total assets measured at fair value	265	306	251
Other Current Assets | Short-term investment
Assets:
Total assets measured at fair value	151	143	151
Other Current Assets | Hedge derivatives-Assets
Assets:
Total assets measured at fair value	1,255	13	112
Other Current Assets | Level 1 | Available-for-sale securities
Assets:
Total assets measured at fair value	265	306	251
Other Current Assets | Level 1 | Short-term investment
Assets:
Total assets measured at fair value	151	143	151
Other Current Assets | Level 1 | Hedge derivatives-Assets
Assets:
Total assets measured at fair value	0	0	0
Other Current Assets | Level 2 | Available-for-sale securities
Assets:
Total assets measured at fair value	0	0	0
Other Current Assets | Level 2 | Short-term investment
Assets:
Total assets measured at fair value	0	0	0
Other Current Assets | Level 2 | Hedge derivatives-Assets
Assets:
Total assets measured at fair value	1,255	13	112
Other Current Assets | Level 3 | Available-for-sale securities
Assets:
Total assets measured at fair value	0	0	0
Other Current Assets | Level 3 | Short-term investment
Assets:
Total assets measured at fair value	0	0	0
Other Current Assets | Level 3 | Hedge derivatives-Assets
Assets:
Total assets measured at fair value	0	0	0
Other Non-current Assets | SERP assets - employer
Assets:
Total assets measured at fair value	618	605	559
Other Non-current Assets | SERP assets - employee
Assets:
Total assets measured at fair value	49,633	53,442	49,093
Other Non-current Assets | Level 1 | SERP assets - employer
Assets:
Total assets measured at fair value	618	605	559
Other Non-current Assets | Level 1 | SERP assets - employee
Assets:
Total assets measured at fair value	49,633	53,442	49,093
Other Non-current Assets | Level 2 | SERP assets - employer
Assets:
Total assets measured at fair value	0	0	0
Other Non-current Assets | Level 2 | SERP assets - employee
Assets:
Total assets measured at fair value	0	0	0
Other Non-current Assets | Level 3 | SERP assets - employer
Assets:
Total assets measured at fair value	0	0	0
Other Non-current Assets | Level 3 | SERP assets - employee
Assets:
Total assets measured at fair value	0	0	0
Other non-current liabilities | SERP liabilities - employee
Liabilities:
Total liabilities measured at fair value	49,633	53,442	49,093
Other non-current liabilities | Defined Benefit Plan Assets
Assets:
Total assets measured at fair value	36,423	34,313	32,996
Other non-current liabilities | Level 1 | SERP liabilities - employee
Liabilities:
Total liabilities measured at fair value	49,633	53,442	49,093
Other non-current liabilities | Level 1 | Defined Benefit Plan Assets
Assets:
Total assets measured at fair value	0	0	0
Other non-current liabilities | Level 2 | SERP liabilities - employee
Liabilities:
Total liabilities measured at fair value	0	0	0
Other non-current liabilities | Level 2 | Defined Benefit Plan Assets
Assets:
Total assets measured at fair value	0	0	0
Other non-current liabilities | Level 3 | SERP liabilities - employee
Liabilities:
Total liabilities measured at fair value	0	0	0
Other non-current liabilities | Level 3 | Defined Benefit Plan Assets
Assets:
Total assets measured at fair value	36,423	34,313	32,996
Accrued Liabilities | Hedge derivatives-Liabilities
Liabilities:
Total liabilities measured at fair value	1,263	1,111	697
Accrued Liabilities | Level 1 | Hedge derivatives-Liabilities
Liabilities:
Total liabilities measured at fair value	0	0	0
Accrued Liabilities | Level 2 | Hedge derivatives-Liabilities
Liabilities:
Total liabilities measured at fair value	1,263	1,111	697
Accrued Liabilities | Level 3 | Hedge derivatives-Liabilities
Liabilities:
Total liabilities measured at fair value	$ 0	$ 0	$ 0