Fair Value Measurements - Assets and Liabilities Measured at Fair Value on Recurring Basis (Details) - Fair Value, Measurements, Recurring - USD ($) $ in Thousands	Jul. 31, 2025	Jan. 31, 2025	Jul. 31, 2024
Assets:
Total assets measured at fair value	$ 90,293	$ 88,822	$ 88,111
Liabilities:
Total liabilities measured at fair value	54,401	54,553	52,535
Level 1
Assets:
Total assets measured at fair value	54,564	54,496	53,593
Liabilities:
Total liabilities measured at fair value	53,422	53,442	52,511
Level 2
Assets:
Total assets measured at fair value	113	13	409
Liabilities:
Total liabilities measured at fair value	979	1,111	24
Level 3
Assets:
Total assets measured at fair value	35,616	34,313	34,109
Liabilities:
Total liabilities measured at fair value	0	0	0
Other Current Assets \| Available-for-sale securities
Assets:
Total assets measured at fair value	268	306	272
Other Current Assets \| Short-term investment
Assets:
Total assets measured at fair value	150	143	151
Other Current Assets \| Hedge derivatives-Assets
Assets:
Total assets measured at fair value	113	13	409
Other Current Assets \| Level 1 \| Available-for-sale securities
Assets:
Total assets measured at fair value	268	306	272
Other Current Assets \| Level 1 \| Short-term investment
Assets:
Total assets measured at fair value	150	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	113	13	409
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	724	605	659
Other Non-current Assets \| SERP assets - employee
Assets:
Total assets measured at fair value	53,422	53,442	52,511
Other Non-current Assets \| Level 1 \| SERP assets - employer
Assets:
Total assets measured at fair value	724	605	659
Other Non-current Assets \| Level 1 \| SERP assets - employee
Assets:
Total assets measured at fair value	53,422	53,442	52,511
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	53,422	53,442	52,511
Other non-current liabilities \| Defined Benefit Plan Assets
Assets:
Total assets measured at fair value	35,616	34,313	34,109
Other non-current liabilities \| Level 1 \| SERP liabilities - employee
Liabilities:
Total liabilities measured at fair value	53,422	53,442	52,511
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	35,616	34,313	34,109
Accrued Liabilities \| Hedge derivatives-Liabilities
Liabilities:
Total liabilities measured at fair value	979	1,111	24
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	979	1,111	24
Accrued Liabilities \| Level 3 \| Hedge derivatives-Liabilities
Liabilities:
Total liabilities measured at fair value	$ 0	$ 0	$ 0