Consolidated Statements of Income - USD ($)	12 Months Ended
	Mar. 31, 2024	Mar. 31, 2023	Mar. 31, 2022
Income Statement [Abstract]
Revenues	$ 795,311,000	$ 718,562,000	$ 646,230,000
Cost of revenues	623,618,000	560,303,000	494,116,000
Gross profit	171,693,000	158,259,000	152,114,000
General and administrative	76,592,000	73,705,000	67,602,000
Income before income taxes	95,101,000	84,554,000	84,512,000
Income tax provision	18,849,000	18,189,000	18,102,000
Net income	$ 76,252,000	$ 66,365,000	$ 66,410,000
Net income per share:
Basic	$ 4.45	$ 3.83	$ 3.74
Diluted	$ 4.4	$ 3.77	$ 3.66
Weighted average shares outstanding:
Basic	17,122,000	17,328,000	17,753,000
Diluted	17,347,000	17,592,000	18,127,000