Depreciation is computed for financial reporting purposes by use of the straight-line method based on the useful lives of 20 to 35 years for building and 5 to 25 years for machinery and equipment. Depreciation expenses was $19,229, $18,279 and $17,862 in 2011, 2010 and 2009, respectively.

Goodwill and intangible assets:

In accordance with authoritative guidance, goodwill and intangible assets with indefinite lives are not amortized, but rather tested for impairment at least annually unless certain interim triggering events or circumstances require more frequent testing. All trademarks have been assessed by management to have indefinite lives because they are expected to generate cash flows indefinitely. The Company has completed its annual impairment testing of its goodwill and trademarks at December 31 of each of the years presented. As of December 31, 2009, management ascertained that certain trademarks were impaired, and recorded a pre-tax charge of $14,000. No impairments of intangibles were recorded in 2011 and 2010. This determination is made by comparing the carrying value of the asset with its estimated fair value, which is calculated using estimates including discounted projected future cash flows. If the carrying value of goodwill exceeds the fair value, a second step would measure the carrying value and implied fair value of goodwill. Management believes that all assumptions used for the impairment tests are consistent with those utilized by market participants performing similar valuations.