Consolidated Statements of Cash Flows - USD ($) $ in Thousands	12 Months Ended
	Feb. 29, 2016	Feb. 28, 2015	Feb. 28, 2014
Cash Flows From Operating Activities:
Net Income	$ 76,790	$ 64,943	$ 59,597
Adjustments To Reconcile Net Income To Net Cash Provided By Operating Activities:
Depreciation	31,200	28,100	25,100
Depreciation, Amortization and Accretion, Net	47,417	46,089	43,305
Deferred income tax expense	2,707	15,818	842
Share-based compensation expense	4,538	4,080	3,703
Amortization of deferred borrowing costs	1,347	1,431	1,421
Provision for doubtful accounts	(1,072)	458	(116)
Gain (Loss) on Disposition of Assets	286	2,651	0
Net (gain) loss on insurance settlement or sale of property, plant and equipment	(327)	(2,525)	(8,039)
Effects of changes in operating assets and liabilities, net of acquisitions:
Accounts Receivable	(843)	(9,382)	35,955
Inventories	11,124	(879)	(6,209)
Prepaid expenses and other assets	1,996	5,543	(6,590)
Net change in billings related to costs and estimated earnings on uncompleted contracts	5,739	(5,635)	(9,732)
Accounts payable	(2,236)	11,026	(4,150)
Other accrued liabilities and income taxes payable	(3,877)	(15,460)	(2,712)
Net cash provided by operating activities:	143,589	118,157	107,275
Cash flows from investing activities:
Proceeds from the sale or insurance settlement of property, plant, and equipment	1,137	1,330	8,205
Acquisition of subsidiaries, net of cash acquired	(60,584)	(11,518)	(275,702)
Purchases of property, plant and equipment	(39,861)	(29,377)	(43,472)
Net cash used in investing activities:	(99,308)	(39,565)	(310,969)
Cash flows from financing activities:
Tax benefits from stock options exercised	1,025	259	1,602
Payments on revolving loan	(170,561)	(57,905)	(60,000)
Proceeds from Lines of Credit	181,481	10,977	197,000
Proceeds from Issuance of Long-term Debt	0	0	75,000
Proceeds from long-term debt	(21,786)	(20,848)	(17,098)
Cash dividends paid	(15,482)	(14,897)	(14,290)
Net cash provided by (used in) financing activities	(25,323)	(82,414)	176,333
Effect of exchange rate changes on cash	(1,294)	(1,216)	(672)
Net increase (decrease) in cash and cash equivalents	17,664	(5,038)	(28,033)
Cash and cash equivalents at beginning of year	22,527	27,565	55,598
Cash and cash equivalents at end of year	40,191	22,527	27,565
Cash paid during the year for:
Interest	14,228	15,613	16,500
Income taxes	21,574	15,264	26,332
Payments of Debt Issuance Costs	$ 0	$ 0	$ (5,881)