Debt - Interest Income and Expense (Details) - USD ($) $ in Thousands	12 Months Ended
Mar. 31, 2020	Mar. 31, 2019	Mar. 31, 2018
Interest expense
Contractual interest expense	$ 6,935	$ 19,471	$ 30,323
Capitalized interest	(240)	(232)	(141)
Amortization of debt issuance costs	428	334	511
Amortization of debt (premium) discount	3,749	1,481	1,843
Imputed interest on acquisition related obligations	(4)	57	113
Interest expense on capital leases	153	128	233
Total interest expense	$ 11,021	$ 21,239	$ 32,882

The amount of expense recognized in the current period that reflects the allocation of capitalized costs associated with acquisition of business. As a noncash expense, this element is added back to net income when calculating cash provided by or used in operations using the indirect method.

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Amount of noncash expense included in interest expense to amortize debt discount and premium associated with the related debt instruments. Excludes amortization of financing costs. Alternate captions include noncash interest expense.

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Amount of amortization expense attributable to debt issuance costs.

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The financing charge for leasing arrangements meeting the criteria for capitalization.

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Amount of interest costs capitalized disclosed as an adjusting item to interest costs incurred.

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Amount of the cost of borrowed funds accounted for as interest expense.

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Represents the portion of interest incurred in the period on debt arrangements that was charged against earnings, excluding amortization of debt discount (premium) and financing costs.

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