Consolidated Statements of Cash Flows - USD ($) $ in Thousands	12 Months Ended
	Feb. 28, 2017	Feb. 29, 2016	Feb. 28, 2015
Cash Flows From Operating Activities:
Net Income	$ 60,921	$ 76,790	$ 64,943
Adjustments To Reconcile Net Income To Net Cash Provided By Operating Activities:
Depreciation	33,400	31,200	28,100
Depreciation, Amortization and Accretion, Net	50,357	47,417	46,089
Deferred income tax expense	1,509	2,707	15,818
Share-based compensation expense	5,870	4,538	4,080
Amortization of deferred debt issuance costs	1,262	1,347	1,431
Provision for doubtful accounts	48	(1,072)	458
Gain (Loss) on Disposition of Assets	6,602	286	2,651
Net (gain) loss on insurance settlement or sale of property, plant and equipment	76	(327)	(2,525)
Effects of changes in operating assets and liabilities, net of acquisitions:
Accounts Receivable	(4,912)	(843)	(9,382)
Inventories	(17,951)	11,124	(879)
Prepaid expenses and other assets	(1,977)	1,996	5,543
Net change in billings related to costs and estimated earnings on uncompleted contracts	14,509	5,739	(5,635)
Accounts payable	1,245	(2,236)	11,025
Other accrued liabilities and income taxes payable	(6,383)	(3,877)	(15,460)
Net cash provided by operating activities:	111,176	143,589	118,157
Cash flows from investing activities:
Proceeds from the sale or insurance settlement of property, plant, and equipment	769	1,137	1,330
Acquisition of subsidiaries, net of cash acquired	(22,679)	(60,584)	(11,518)
Purchases of property, plant and equipment	(41,434)	(39,861)	(29,377)
Net cash used in investing activities:	(63,344)	(99,308)	(39,565)
Cash flows from financing activities:
Tax benefits from stock options exercised	0	1,025	259
Payments on revolving loan	(211,000)	(170,561)	(57,905)
Proceeds from Lines of Credit	179,500	181,481	10,977
Proceeds from long-term debt	(23,192)	(21,786)	(20,848)
Cash dividends paid	(16,645)	(15,482)	(14,897)
Net cash provided by (used in) financing activities	(76,619)	(25,323)	(82,414)
Payments for Repurchase of Common Stock	5,282	0	0
Effect of exchange rate changes on cash	(102)	(1,294)	(1,216)
Net increase (decrease) in cash and cash equivalents	(28,889)	17,664	(5,038)
Cash and cash equivalents at beginning of year	40,191	22,527	27,565
Cash and cash equivalents at end of year	11,302	40,191	22,527
Cash paid during the year for:
Interest	13,780	14,228	15,613
Income taxes	$ 19,857	$ 21,574	$ 15,264