Fair Value Measurements (Tables)

6 Months Ended

Sep. 30, 2022

Fair Value Disclosures [Abstract]

Financial Assets And Liabilities Measured At Fair Value On Recurring Basis [Table Text Block]

At September 30, 2022 and 2021, and at March 31, 2022, the Company had certain financial assets and financial liabilities that were required to be measured and reported at fair value on a recurring basis. These assets and liabilities are listed in the tables below and are classified based on how their values were determined under the fair value hierarchy or the NAV practical expedient:

	September 30, 2022
			Fair Value Hierarchy
(in thousands of dollars)	NAV		Level 1		Level 2		Level 3		Total
Assets
Money market funds	$	334	$	—	$	—	$	—	$	334
Trading securities associated with deferred compensation plans	—		10,845		—		—		10,845
Interest rate swap agreements	—		—		13,959		—		13,959
Foreign currency exchange contracts	—		—		3,539		—		3,539
Total financial assets measured and reported at fair value	$	334	$	10,845	$	17,498	$	—	$	28,677
Liabilities
Foreign currency exchange contracts	$	—	$	—	$	181	$	—	$	181
Total financial liabilities measured and reported at fair value	$	—	$	—	$	181	$	—	$	181

	September 30, 2021
			Fair Value Hierarchy
(in thousands of dollars)	NAV		Level 1		Level 2		Level 3		Total
Assets
Money market funds	$	335	$	—	$	—	$	—	$	335
Trading securities associated with deferred compensation plans	—		14,557		—		—		14,557
Foreign currency exchange contracts	—		—		1,917		—		1,917
Total financial assets measured and reported at fair value	$	335	$	14,557	$	1,917	$	—	$	16,809
Liabilities
Interest rate swap agreements	$	—	$	—	$	22,888	$	—	$	22,888
Foreign currency exchange contracts	—		—		3,791		—		3,791
Total financial liabilities measured and reported at fair value	$	—	$	—	$	26,679	$	—	$	26,679

	March 31, 2022
			Fair Value Hierarchy
(in thousands of dollars)	NAV		Level 1		Level 2		Level 3		Total
Assets
Money market funds	$	334	$	—	$	—	$	—	$	334
Trading securities associated with deferred compensation plans	—		13,655		—		—		13,655
Foreign currency exchange contracts	—		—		24,068		—		24,068
Total financial assets measured and reported at fair value	$	334	$	13,655	$	24,068	$	—	$	38,057
Liabilities
Interest rate swap agreements	$	—	$	—	$	1,161	$	—	$	1,161
Foreign currency exchange contracts	—		—		3,264		—		3,264
Total financial liabilities measured and reported at fair value	$	—	$	—	$	4,425	$	—	$	4,425

Schedule of Business Acquisitions by Acquisition, Contingent Consideration [Table Text Block]

A reconciliation of the change in the balance of the acquisition-related contingent consideration obligation (Level 3) for the six months ended September 30, 2022 and 2021 is provided below.

(in thousands of dollars)	Six Months Ended September 30,
	2022		2021
Balance beginning of year	$	—	$	2,532
Change in fair value of contingent consideration liability			(2,532)
Balance at end of period	$	—	$	—

Schedule of Carrying Values and Estimated Fair Values of Debt Instruments [Table Text Block]

The following table summarizes the fair and carrying value of the Company’s long-term debt, including the current portion at each of the balance sheet dates September 30, 2022, and 2021 and March 31, 2022:

(in millions of dollars)	September 30, 2022		September 30, 2021		March 31, 2022
Fair market value of long term obligations	$	517	$	518	$	517
Carrying value of long term obligations	$	520	$	520	$	520