CONSOLIDATED STATEMENTS OF STOCKHOLDERS’ EQUITY (Parentheticals) - $ / shares		1 Months Ended	12 Months Ended
	Jun. 30, 2019	Jul. 31, 2019	Mar. 31, 2020	Mar. 31, 2019	Mar. 31, 2018
Statement of Stockholders' Equity [Abstract]
Cash dividends declared per common share (in dollars per share)	$ 0.39	$ 0.41	$ 1.62	$ 1.51	$ 1.30