Consolidated Statements of Cash Flows - USD ($) $ in Thousands	12 Months Ended
	Feb. 29, 2020	Feb. 28, 2019	Feb. 28, 2018
Cash Flows From Operating Activities:
Net Income	$ 48,234	$ 51,208	$ 45,169
Adjustments To Reconcile Net Income To Net Cash Provided By Operating Activities:
Depreciation, Amortization and Accretion, Net	50,194	50,245	50,526
Deferred income taxes	(2,617)	3,731	(20,637)
Loss on disposal of business	(18,632)	0	0
Share-based compensation expense	6,290	4,659	6,121
Amortization of deferred debt issuance costs	538	541	595
Provision for doubtful accounts	2,734	2,153	3,007
Gain (Loss) on Disposition of Assets	9,157	810	10,834
Net loss on sale of property, plant & equipment and insurance proceeds	(71)	9	765
Effects of changes in operating assets and liabilities, net of acquisitions:
Accounts Receivable	(1,006)	(8,131)	3,492
Inventories	25,875	(595)	(9,927)
Prepaid expenses and other assets	(291)	(4,883)	(2,376)
Net change in contract assets and liabilities	(47,040)	3,091	984
Accounts payable	10,594	(171)	1,540
Other accrued liabilities and income taxes payable	23,536	8,809	(13,283)
Net cash provided by operating activities:	144,759	111,476	76,810
Cash flows from investing activities:
Proceeds from the sale or insurance settlement of property, plant, and equipment	340	1,543	458
Proceeds from sale of subsidiary, net	23,584	0	0
Payments to Acquire Businesses, Net of Cash Acquired	60,628	8,000	44,785
Purchases of property, plant and equipment	(35,044)	(25,616)	(29,612)
Net cash used in investing activities:	(71,748)	(32,073)	(73,939)
Cash flows from financing activities:
Proceeds from issuance of common stock	3,113	3,765	3,317
Payments for taxes related to net share settlement of equity awards	(1,231)	(573)	(1,218)
Payments on revolving loan	(466,500)	(310,000)	(256,500)
Proceeds from Lines of Credit	428,500	264,000	349,000
Proceeds from long-term debt	0	(14,286)	(63,504)
Cash dividends paid	(17,822)	(17,718)	(17,678)
Net cash provided by (used in) financing activities	(59,739)	(74,812)	5,899
Payments for Repurchase of Common Stock	5,799	0	7,518
Effect of exchange rate changes on cash	(590)	(1,439)	781
Net increase (decrease) in cash and cash equivalents	12,682	3,152	9,551
Cash and cash equivalents at beginning of year	24,005	20,853	11,302
Cash and cash equivalents at end of year	36,687	24,005	20,853
Cash paid during the year for:
Interest	13,023	14,880	13,593
Income taxes	$ 18,802	$ 3,291	$ 8,701