UNAUDITED CONSOLIDATED STATEMENTS OF OPERATIONS - USD ($) shares in Thousands, $ in Thousands	3 Months Ended
	Jun. 30, 2019	Jun. 30, 2018
Net sales
Total	$ 381,372	$ 356,532
Cost of sales
Total	288,733	275,829
Gross profit	92,639	80,703
Selling, general, and administrative	65,787	56,966
Depreciation and amortization	3,463	2,790
Interest and financing costs	628	476
Operating expenses	69,878	60,232
Operating income	22,761	20,471
Other income (expense)	(45)	97
Earnings before tax	22,716	20,568
Provision for income taxes	6,528	5,295
Net earnings	$ 16,188	$ 15,273
Net earnings per common share-basic (in dollars per share)	$ 1.21	$ 1.14
Net earnings per common share-diluted (in dollars per share)	$ 1.20	$ 1.12
Weighted average common shares outstanding-basic (in shares)	13,356	13,434
Weighted average common shares outstanding-diluted (in shares)	13,457	13,597
Product [Member]
Net sales
Total	$ 335,601	$ 322,817
Cost of sales
Total	260,063	255,812
Services [Member]
Net sales
Total	45,771	33,715
Cost of sales
Total	$ 28,670	$ 20,017