Consolidated Statements of Cash Flows - USD ($) $ in Thousands	12 Months Ended
	Feb. 28, 2019	Feb. 28, 2018	Feb. 28, 2017
Cash Flows From Operating Activities:
Net Income	$ 51,208	$ 45,169	$ 61,264
Adjustments To Reconcile Net Income To Net Cash Provided By Operating Activities:
Depreciation, Amortization and Accretion, Net	50,245	50,526	50,357
Deferred income taxes	3,731	(20,637)	1,714
Share-based compensation expense	4,659	6,121	5,870
Amortization of deferred debt issuance costs	541	595	1,262
Provision for doubtful accounts	2,153	3,007	48
Gain (Loss) on Disposition of Assets	810	10,834	6,602
Net loss on sale of property, plant & equipment and insurance proceeds	9	765	76
Effects of changes in operating assets and liabilities, net of acquisitions:
Accounts Receivable	(8,131)	3,492	(4,912)
Inventories	(595)	(9,927)	(13,754)
Prepaid expenses and other assets	(4,883)	(2,376)	(1,977)
Net change in contract assets and liabilities	3,091	984	13,592
Accounts payable	(171)	1,540	1,245
Other accrued liabilities and income taxes payable	12,001	(11,184)	(10,211)
Net cash provided by operating activities:	114,668	78,909	111,176
Cash flows from investing activities:
Proceeds from the sale or insurance settlement of property, plant, and equipment	1,543	458	769
Payments to Acquire Businesses, Net of Cash Acquired	8,000
Purchases of property, plant and equipment	(25,616)	(29,612)	(41,434)
Net cash used in investing activities:	(32,073)	(73,939)	(63,344)
Cash flows from financing activities:
Payments on revolving loan	(310,000)	(256,500)	(211,000)
Proceeds from Lines of Credit	264,000	349,000	179,500
Proceeds from long-term debt	(14,286)	(63,504)	(23,192)
Cash dividends paid	(17,718)	(17,678)	(16,645)
Net cash provided by (used in) financing activities	(78,004)	3,800	(76,619)
Payments for Repurchase of Common Stock	0	7,518	5,282
Effect of exchange rate changes on cash	(1,439)	781	(102)
Net increase (decrease) in cash and cash equivalents	3,152	9,551	(28,889)
Cash and cash equivalents at beginning of year	20,853	11,302	40,191
Cash and cash equivalents at end of year	24,005	20,853	11,302
Cash paid during the year for:
Interest	14,880	13,593	13,780
Income taxes	$ 3,291	$ 8,701	$ 19,857