CONSOLIDATED STATEMENTS OF CASH FLOWS (USD $) In Thousands, unless otherwise specified	12 Months Ended
	Aug. 31, 2012		Aug. 31, 2011		Aug. 31, 2010
Statement of Cash Flows [Abstract]
Net Income (Loss), Including Portion Attributable to Noncontrolling Interest	$ 67,621		$ 61,750		$ 49,447
Adjustments to Reconcile Net Income (Loss) to Cash Provided by (Used in) Operating Activities [Abstract]
Depreciation, Depletion and Amortization	23,739	[1]	21,154	[2]	15,260
Provision for Doubtful Accounts	(4)		(10)		5
Asset impairment and closure costs	0		0		18
Gain (Loss) on Sale of Property Plant Equipment	(312)		(486)		(504)
Gain on sale of excess real estate in Panama	0		1,249		0
Increase (Decrease) in Deferred Income Taxes	(2,128)		(642)		(3,562)
Discontinued operations	0		86		(16)
Excess tax (benefit) deficiency on stock-based compensation	(1,438)		(752)		57
Equity in losses of unconsolidated affiliates	15		52		22
Share-based Compensation	5,469		4,037		3,778
Increase (Decrease) in Operating Capital [Abstract]
Increase (Decrease) in Other Operating Assets	(5,668)		3,657		(2,718)
Increase (Decrease) in Inventories	23,811		46,043		15,349
Increase (Decrease) in Accounts Payable	9,766		39,030		22,989
Net cash provided by (used in) continuing operating activities	89,465		75,526		82,995
Cash Provided by (Used in) Operating Activities, Discontinued Operations	424		73		34
Net cash provided by (used in) operating activities	89,889		75,599		83,029
Net Cash Provided by (Used in) Investing Activities [Abstract]
Additions to property and equipment	(52,705)		(47,033)		(50,207)
Proceeds from Sale of Property, Plant, and Equipment	138		182		282
Proceeds from Sale of Property Held-for-sale	0		7,406		0
Purchase of 5% Trinidad noncontrolling interest	0		0		(3,800)
Capital contribution to Panama joint venture	0		0		(433)
Net cash flows provided by (used in) investing activities	(52,567)		(39,445)		(54,158)
Net Cash Provided by (Used in) Financing Activities [Abstract]
Proceeds from Issuance of Debt	75,924		45,261		44,904
Repayment of bank borrowings	(67,259)		(39,232)		(24,922)
Payments of Dividends	(18,120)		(17,934)		(14,895)
Release of (addition to) restricted cash	(14,000)		(16,920)		(6,000)
Stockholder contribution	0		0		396
Excess tax (deficiency) benefit on stock-based compensation	1,438		752		(57)
Purchase of treasury stock	(3,154)		(2,711)		(1,434)
Proceeds from Stock Options Exercised	89		144		873
Net cash provided by (used in) financing activities	(25,082)		(30,640)		(1,135)
Effect of Exchange Rate on Cash and Cash Equivalents	2,191		(2,043)		1,417
Cash and Cash Equivalents, Period Increase (Decrease)	14,431		3,471		29,153
Cash and cash equivalents at beginning of year	76,817		73,346		44,193
Cash and cash equivalents at end of year	91,248		76,817		73,346
Supplemental Cash Flow Information [Abstract]
Interest Paid, Net	4,837		3,686		2,613
Income Taxes Paid, Net	29,135		22,389		19,309
Noncash Investing and Financing Items [Abstract]
Cancellation of joint ventures Prico Enterprise loan	$ (473)		$ 0		$ 0

[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.

[2] Includes a $2.0 million and $235,000 error that increased expense in the Latin America and Caribbean operations, respectively, related to prior periods. See Note 1 - Company Overview and Basis of Presentation.