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Significant Accounting Policies (Details 3) (USD $) In Thousands, unless otherwise specified | 12 Months Ended
--- | ---
Dec. 31, 2013 | Dec. 31, 2012 | Dec. 31, 2011
Shipping and Handling |  |  |
Shipping and handling costs, included in selling, general and administrative expenses | $ 1,235 | $ 1,118 | $ 1,197
Advertising Expenses |  |  |
Advertising costs, included in selling, general and administrative expenses | 474 | 29 | 12
Retirement and other post-retirement benefits |  |  |
Amount incurred | 3,138 | 2,771 | 2,580
Foreign Currency Translation and Transactions |  |  |
Foreign exchange gains (losses) included in selling, general and administrative expenses | 650 | 207 | (89)
Gains (losses) on intra-entity foreign currency transactions that are of a long-term-investment nature | 235 | 199 | 247
Operating Leases |  |  |
Capital leases | 0 | 0 |
Seasonal influenza vaccine |  |  |
Revenue Recognition |  |  |
Sales return provisions | 575 | 1,300 |
Inactivated hepatitis A vaccine and combined inactivated hepatitis A&B vaccine |  |  |
Revenue Recognition |  |  |
Sales return provisions | $ 2,240 | $ 1,700 |
Sales return provision represented as a percentage of private pay market sales | 5.50% | 5.40% |

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- Definition Amount equal to the present value (the principal) at the beginning of the lease term of minimum lease payments during the lease term (excluding that portion of the payments representing executory costs such as insurance, maintenance, and taxes to be paid by the lessor, together with any profit thereon) net of payments or other amounts applied to the principal through the balance sheet date. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 03 -Paragraph 16 -Article 7 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 840 -SubTopic 30 -Section 50 -Paragraph 1 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=6455398&loc=d3e45280-112737 + Details
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