SIGNIFICANT ACCOUNTING POLICIES: (Details 4) (USD $) In Thousands, unless otherwise specified	12 Months Ended
Dec. 31, 2011	Dec. 31, 2010	Dec. 31, 2009	Dec. 31, 2008
Retrospective application of change in accounting principle
Decrease in accumulated earnings	$ 114,269	$ 135,866	$ 147,687	$ 144,949
Decrease in deferred income taxes	43,521	47,865
Increase in product cost of goods sold	365,225	349,334	319,775
Decrease in provision for income taxes	16,974	20,005	9,892
Adjustment of opening balance \| Revision of LIFO reserve
Retrospective application of change in accounting principle
Decrease in accumulated earnings				174
Decrease in inventories		2,424
Decrease in deferred income taxes		878
Increase in product cost of goods sold		1,021	1,130
Decrease in provision for income taxes		$ 370	$ 409

Represents the noncurrent portion of deferred tax liabilities, which result from applying the applicable tax rate to net taxable temporary differences pertaining to each jurisdiction to which the entity is obligated to pay income tax. A noncurrent taxable temporary difference is a difference between the tax basis and the carrying amount of a noncurrent asset or liability in the financial statements prepared in accordance with generally accepted accounting principles. In a classified statement of financial position, an enterprise separates deferred tax liabilities and assets into a current amount and a noncurrent amount. Deferred tax liabilities and assets are classified as current or noncurrent based on the classification of the related asset or liability for financial reporting. A deferred tax liability or asset that is not related to an asset or liability for financial reporting, including deferred tax assets related to carryforwards, are classified according to the expected reversal date of the temporary difference.

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The sum of the current income tax expense or benefit and the deferred income tax expense or benefit pertaining to continuing operations.

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