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ACCOUNTING CHANGE FOR SHIPPING AND HANDLING COSTS (Details) (USD $) In Thousands, unless otherwise specified | 3 Months Ended | 12 Months Ended
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Dec. 31, 2012 | Sep. 30, 2012 | Jun. 30, 2012 | Mar. 31, 2012 | Dec. 31, 2011 | Sep. 30, 2011 | Jun. 30, 2011 | Mar. 31, 2011 | Dec. 31, 2012 | Dec. 31, 2011 | Dec. 31, 2010
ACCOUNTING CHANGE FOR SHIPPING AND HANDLING |  |  |  |  |  |  |  |  |  |  |
Impact of change in accounting principle on cost of sales and selling, general and administrative expenses | $ 5,281 |  |  |  |  |  |  |  |  |  |
Impact of change in accounting principle |  |  |  |  |  |  |  |  |  |  |
Cost of sales | 23,841 | 23,144 | 22,610 | 23,729 | 21,911 | 21,957 | 22,040 | 23,501 | 93,324 | 89,409 | 89,264
Selling, general and administrative | 27,719 | 26,228 | 26,530 | 26,384 | 27,086 | 26,767 | 28,329 | 27,424 | 106,861 | 109,606 | 119,024
Under Previous Method |  |  |  |  |  |  |  |  |  |  |
Impact of change in accounting principle |  |  |  |  |  |  |  |  |  |  |
Cost of sales |  |  |  |  |  |  |  |  | 71,719 | 69,410 | 69,040
Selling, general and administrative |  |  |  |  |  |  |  |  | 128,466 | 129,605 | 139,248
Difference |  |  |  |  |  |  |  |  |  |  |
Impact of change in accounting principle |  |  |  |  |  |  |  |  |  |  |
Cost of sales |  |  |  |  |  |  |  |  | 21,605 | 19,999 | 20,224
Selling, general and administrative |  |  |  |  |  |  |  |  | (21,605) | (19,999) | (20,224)
Change in the method of accounting of shipping and handling costs |  |  |  |  |  |  |  |  |  |  |
ACCOUNTING CHANGE FOR SHIPPING AND HANDLING |  |  |  |  |  |  |  |  |  |  |
Impact of change in accounting principle on cost of sales and selling, general and administrative expenses |  |  |  |  |  |  |  |  |  | 19,999 | 20,224
Change in the method of accounting of shipping and handling costs | Under Previous Method |  |  |  |  |  |  |  |  |  |  |
ACCOUNTING CHANGE FOR SHIPPING AND HANDLING |  |  |  |  |  |  |  |  |  |  |
Shipping and handling costs |  |  |  |  |  |  |  |  | 12,231 | 11,245 | 10,310
Change in the method of accounting of shipping and handling costs | Difference |  |  |  |  |  |  |  |  |  |  |
ACCOUNTING CHANGE FOR SHIPPING AND HANDLING |  |  |  |  |  |  |  |  |  |  |
Shipping and handling costs |  |  |  |  |  |  |  |  | 9,374 | 8,754 | 9,914
Impact of change in accounting principle on cost of sales and selling, general and administrative expenses |  |  |  |  |  |  |  |  | $ 21,605 |  |

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- Definition The aggregate costs related to goods produced and sold and services rendered by an entity during the reporting period. This excludes costs incurred during the reporting period related to financial services rendered and other revenue generating activities. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 03 -Paragraph 2 -Article 5 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 225 -SubTopic 10 -Section S99 -Paragraph 2 -Subparagraph (SX 210.5-03.2(a),(d)) -URI http://asc.fasb.org/extlink&oid=6880815&loc=d3e20235-122688 + Details
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- Definition The aggregate total costs related to selling a firm's product and services, as well as all other general and administrative expenses. Direct selling expenses (for example, credit, warranty, and advertising) are expenses that can be directly linked to the sale of specific products. Indirect selling expenses are expenses that cannot be directly linked to the sale of specific products, for example telephone expenses, Internet, and postal charges. General and administrative expenses include salaries of non-sales personnel, rent, utilities, communication, etc. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher AICPA -Name Accounting Research Bulletin (ARB) -Number 43 -Paragraph 5A -Chapter 4 -LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy. Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 03 -Paragraph 4 -Article 5 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 225 -SubTopic 10 -Section S99 -Paragraph 2 -Subparagraph (SX 210.5-03.4) -URI http://asc.fasb.org/extlink&oid=6880815&loc=d3e20235-122688 Reference 4: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 330 -SubTopic 10 -Section 30 -Paragraph 8 -URI http://asc.fasb.org/extlink&oid=6386349&loc=d3e3636-108311 + Details
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- Definition Cost incurred during the reporting period in transporting goods and services to customers. Includes freight-out costs. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 605 -SubTopic 45 -Section S99 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=6408413&loc=d3e221937-122793 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 235 -SubTopic 10 -Section 50 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=6367646&loc=d3e18726-107790 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher AICPA -Name Accounting Principles Board Opinion (APB) -Number 22 -Paragraph 8 -LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy. Reference 4: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Emerging Issues Task Force (EITF) -Number 00-10 -Paragraph 6 -LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy. Reference 5: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 235 -SubTopic 10 -Section 50 -Paragraph 3 -URI http://asc.fasb.org/extlink&oid=6367646&loc=d3e18780-107790 Reference 6: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Glossary Shipping Costs -URI http://asc.fasb.org/extlink&oid=6525344 Reference 7: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Glossary Handling Costs -URI http://asc.fasb.org/extlink&oid=6514758 Reference 8: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 605 -SubTopic 45 -Section 50 -Paragraph 2 -URI http://asc.fasb.org/extlink&oid=6408196&loc=d3e61069-111654 Reference 9: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 605 -SubTopic 45 -Section 45 -Paragraph 20 -URI http://asc.fasb.org/extlink&oid=21915142&loc=d3e60635-111653 + Details
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