CONSOLIDATED STATEMENTS OF CASH FLOWS (USD $) In Thousands, unless otherwise specified	12 Months Ended
	Aug. 31, 2014		Aug. 31, 2013	Aug. 31, 2012
Statement of Cash Flows [Abstract]
Net Income (Loss), Including Portion Attributable to Noncontrolling Interest	$ 92,886		$ 84,265	$ 67,621
Adjustments to Reconcile Net Income (Loss) to Cash Provided by (Used in) Operating Activities [Abstract]
Depreciation, Depletion and Amortization	28,475	[1]	24,444	23,739
Provision for Doubtful Accounts	0		(1)	(4)
Gain (Loss) on Disposition of Property Plant Equipment	1,445		889	312
Increase (Decrease) in Deferred Income Taxes	2,362		3,049	2,128
Discontinued operations	0		0	25
Excess tax (benefit) deficiency on stock-based compensation	(1,489)		(1,336)	(1,438)
Equity in losses of unconsolidated affiliates	(9)		4	15
Share-based Compensation	6,451		6,302	5,469
Increase (Decrease) in Operating Capital [Abstract]
Increase (Decrease) in Other Operating Assets	(11,676)		6,307	5,668
Increase (Decrease) in Inventories	(8,970)		(16,370)	(23,811)
Increase (Decrease) in Accounts Payable	27,800		23,080	9,766
Net cash provided by (used in) continuing operating activities	137,275		130,633	89,490
Cash Provided by (Used in) Operating Activities, Discontinued Operations	0		0	399
Net cash provided by (used in) operating activities	137,275		130,633	89,889
Additions to property and equipment	(118,101)		(69,927)	(52,705)
Deposits for land purchase option agreements	(850)		(1,599)	0
Proceeds from Sale of Property, Plant, and Equipment	142		264	138
Capital contribution to Panama joint venture	(750)		(550)	0
Net cash flows provided by (used in) investing activities	(119,559)		(71,812)	(52,567)
Net Cash Provided by (Used in) Financing Activities [Abstract]
Proceeds from Issuance of Debt	41,942		3,979	75,924
Repayment of bank borrowings	(23,756)		(7,646)	(67,259)
Payments of Dividends	(21,144)		(18,133)	(18,120)
Release of (addition to) restricted cash	8,000		2,000	(14,000)
Excess tax (deficiency) benefit on stock-based compensation	1,489		1,336	1,438
Purchase of treasury stock	(4,773)		(3,467)	(3,154)
Proceeds from Stock Options Exercised	118		125	89
Net cash provided by (used in) financing activities	1,876		(21,806)	(25,082)
Effect of Exchange Rate on Cash and Cash Equivalents	(4,368)		(6,389)	2,191
Cash and Cash Equivalents, Period Increase (Decrease)	15,224		30,626	14,431
Cash and cash equivalents at beginning of year	121,874		91,248	76,817
Cash and cash equivalents at end of year	137,098		121,874	91,248
Supplemental Cash Flow Information [Abstract]
Interest Paid, Net	3,765		3,885	4,837
Income Taxes Paid, Net	44,261		35,781	29,135
Noncash Investing and Financing Items [Abstract]
Cancellation of joint ventures Prico Enterprise loan	$ 0		$ 0	$ (473)

[1] Includes a $1.1 million error that increased expenses in the Caribbean operations and a $313,000 error that increased expenses in the Latin America operations, both of which were related to prior periods. See Note 1- Company Overview and Basis of Presentation.