Consolidated Statements of Cash Flows - USD ($) $ in Thousands	12 Months Ended
	Feb. 28, 2021	Feb. 29, 2020	Feb. 28, 2019
Cash Flows From Operating Activities:
Net income	$ 39,614	$ 48,234	$ 51,208
Adjustments to reconcile net income to net cash provided by operating activities:
Depreciation and amortization	44,603	50,194	50,245
Deferred income taxes	(1,561)	(2,617)	3,731
Loss on disposal of business	3,080	18,632	0
Loss on abandonment of long-lived assets	6,923	0	0
Loss on disposal group held for sale	6,752	0	0
Write down of excess inventory	2,511	0	0
Impairment loss on long lived assets	0	9,157	810
Loss on sale of property, plant & equipment	219	(71)	9
Share-based compensation expense	7,330	6,290	4,659
Amortization of deferred debt issuance costs	545	538	541
Bad debt expense	1,040	2,734	2,153
Effects of changes in operating assets and liabilities, net of acquisitions:
Accounts receivable	7,926	(1,006)	(8,131)
Inventories	2,145	25,875	(595)
Prepaid expenses and other assets	6,497	(291)	(4,883)
Net change in contract assets and liabilities	5,137	(47,040)	3,091
Accounts payable	(21,521)	8,145	(1,172)
Other accrued liabilities and income taxes payable	(19,205)	23,536	8,809
Net cash provided by operating activities:	92,035	142,310	110,475
Cash flows from investing activities:
Proceeds from the sale or insurance settlement of property, plant, and equipment	461	340	1,543
Proceeds from sale of subsidiary, net	12,444	23,584	0
Acquisition of subsidiaries, net of cash acquired	(4,419)	(60,628)	(8,000)
Purchases of property, plant and equipment	(37,079)	(32,595)	(24,615)
Net cash used in investing activities:	(28,593)	(69,299)	(31,072)
Cash flows from financing activities:
Proceeds from issuance of common stock	2,832	3,113	3,765
Payments for taxes related to net share settlement of equity awards	(712)	(1,231)	(573)
Proceeds from revolving loan	228,000	428,500	264,000
Payments on revolving loan	(277,000)	(466,500)	(310,000)
Proceeds from long-term debt	150,000	0	0
Payments on long-term debt	(125,000)	0	(14,286)
Debt issuance costs paid	(592)	0	0
Repurchase and retirement of common stock	48,311	5,799	0
Payment of dividends	(17,642)	(17,822)	(17,718)
Net cash used in financing activities:	(88,425)	(59,739)	(74,812)
Effect of exchange rate changes on cash and cash equivalents	3,133	(590)	(1,439)
Net change in cash and cash equivalents	(21,850)	12,682	3,152
Cash and cash equivalents, beginning of year	36,687	24,005	20,853
Cash and cash equivalents, end of year	14,837	36,687	24,005
Supplemental disclosures of cash flow information:
Cash paid for interest	8,999	13,023	14,880
Cash paid for income taxes	$ 16,118	$ 18,802	$ 3,291