Consolidated Statements of Cash Flows - USD ($) $ in Thousands	12 Months Ended
	Feb. 28, 2022	Feb. 28, 2021	Feb. 29, 2020
Cash Flows From Operating Activities:
Net income	$ 84,022	$ 39,614	$ 48,234
Adjustments to reconcile net income to net cash provided by operating activities:
Depreciation and amortization	44,665	44,603	50,194
Deferred income taxes	3,467	(1,561)	(2,617)
Loss on disposal of business	552	3,080	18,632
Loss on abandonment of long-lived assets		6,923	0
Loss (gain) on disposal group held for sale	(1,797)	6,752	0
Write down of excess inventory	0	2,511	0
Impairment loss on long lived assets	0	0	9,157
Loss (gain) on sale of property, plant & equipment	607	219	(71)
Share-based compensation expense	9,449	7,330	6,290
Amortization of deferred debt issuance costs	455	545	538
Bad debt expense	(377)	1,040	2,734
Effects of changes in operating assets and liabilities, net of acquisitions:
Accounts receivable	(34,609)	7,926	(1,006)
Inventories	(27,871)	2,145	25,875
Prepaid expenses and other assets	794	6,497	(291)
Net change in contract assets and liabilities	12,218	5,137	(47,040)
Accounts payable	1,284	(21,521)	8,145
Other accrued liabilities and income taxes payable	(6,849)	(19,205)	23,536
Net cash provided by operating activities:	86,010	92,035	142,310
Cash flows from investing activities:
Proceeds from the sale or insurance settlement of property, plant, and equipment	2,789	461	340
Proceeds from sale of subsidiary, net	0	12,444	23,584
Acquisition of subsidiaries, net of cash acquired	(61,219)	(4,419)	(60,628)
Purchases of property, plant and equipment	(28,405)	(37,079)	(32,595)
Net cash used in investing activities:	(86,835)	(28,593)	(69,299)
Cash flows from financing activities:
Proceeds from issuance of common stock	2,788	2,832	3,113
Payments for taxes related to net share settlement of equity awards	(2,187)	(712)	(1,231)
Proceeds from revolving loan	296,000	228,000	428,500
Payments on revolving loan	(248,000)	(277,000)	(466,500)
Proceeds from long-term debt	0	150,000	0
Payments on long-term debt	0	(125,000)	0
Debt issuance costs paid	0	(592)	0
Repurchase and retirement of common stock	30,815	48,311	5,799
Payment of dividends	(16,874)	(17,642)	(17,822)
Net cash provided by (used in) financing activities:	912	(88,425)	(59,739)
Effect of exchange rate changes on cash and cash equivalents	158	3,133	(590)
Net change in cash and cash equivalents	245	(21,850)	12,682
Cash and cash equivalents, beginning of year	14,837	36,687	24,005
Cash and cash equivalents, end of year	15,082	14,837	36,687
Supplemental disclosures of cash flow information:
Cash paid for interest	6,062	8,999	13,023
Cash paid for income taxes	$ 31,660	$ 16,118	$ 18,802