Restructuring Activities - Narrative (Details) - USD ($)	12 Months Ended
	Mar. 31, 2020	Mar. 31, 2019	Mar. 31, 2018
Restructuring Cost and Reserve [Line Items]
Restructuring expenses	$ 905,000	$ 1,715,000	$ 4,600,000
Exit charges	0	0	800,000
Restructuring reserve	1,065,000	1,488,000	1,953,000
Employee Termination Benefits
Restructuring Cost and Reserve [Line Items]
Restructuring expenses	905,000	1,715,000
Restructuring reserve	$ 705,000	$ 876,000	$ 718,000