Exhibit 12

Computation of Ratio of Earnings to Fixed Charges

For the purpose of
determining the ratio of earnings to fixed charges, earnings consist of income (loss) before income taxes and noncontrolling interest, plus fixed charges and amortization of capitalized interest, less interest capitalized. Fixed
charges consist of interest expense (including amortization of deferred financing costs, premiums, and discounts), amortization of capitalized expenses related to indebtedness, plus two-thirds of rental expense (this portion is considered to
be representative of the interest factor), and are computed as follows:



|                                                     |  |                                                      |        |  |      |   |        |      |  |   |        |   |  |      |        |   |  |   |         |  
|---------------------------------------------------- |  | ---------------------------------------------------- | ------ |  | ---- | - | ------ | ---- |  | - | ------ | - |  | ---- | ------ | - |  | - | ------- | -
|                                                     |  | As of and for Year Ended December 31,
(in thousands) |       
|                                                     |  | 2010                                                 |        |  | 2009 |   |        | 2008 |  |   | 2007   |   |  | 2006 |       
|Earnings:                                            |  |                                                      |        |  |      |   |        |      |  |   |        |   |  |      |        |   |  |   |         |  
|Pre-tax income (loss) before noncontrolling interest |  | $                                                    | 3,133  |  |      | $ | 1,692  |      |  | $ | (4,019 | ) |  | $    | 4,867  |   |  | $ | (10,132 | )
|Add: Fixed charges                                   |  |                                                      | 27,624 |  |      |   | 27,222 |      |  |   | 29,466 |   |  |      | 30,611 |   |  |   | 34,452  |  
|Add: Amortization of capitalized interest            |  |                                                      | 75     |  |      |   | 75     |      |  |   | 75     |   |  |      | 75     |   |  |   | 71      |  
|Less: Interest capitalized                           |  |                                                      |       |  |      |   | (10    | )    |  |   |       |   |  |      | (159   | ) |  |   | (154    | )
|                                                     |  |                                                      |        |  |      |   |        |      |  |   |        |   |  |      |        |   |  |   |         |  
|Total Earnings                                       |  | $                                                    | 30,832 |  |      | $ | 28,979 |      |  | $ | 25,522 |   |  | $    | 35,394 |   |  | $ | 24,237  |  
|                                                     |  |                                                      |        |  |      |   |        |      |  |   |        |   |  |      |        |   |  |   |         |  
|                                                     |  |                                                      |        |  |     
|Fixed Charges                                        |  |                                                      |        |  |      |   |        |      |  |   |        |   |  |      |        |   |  |   |         |  
|Interest expense                                     |  | $                                                    | 25,580 |  |      | $ | 25,217 |      |  | $ | 27,477 |   |  | $    | 28,477 |   |  | $ | 32,718  |  
|Interest capitalized                                 |  |                                                      |       |  |      |   | 10     |      |  |   |       |   |  |      | 159    |   |  |   | 154     |  
|Estimated interest on rental expense                 |  |                                                      | 2,044  |  |      |   | 1,995  |      |  |   | 1,989  |   |  |      | 1,975  |   |  |   | 1,580   |  
|                                                     |  |                                                      |        |  |      |   |        |      |  |   |        |   |  |      |        |   |  |   |         |  
|Total Fixed Charges                                  |  | $                                                    | 27,624 |  |      | $ | 27,222 |      |  | $ | 29,466 |   |  | $    | 30,611 |   |  | $ | 34,452  |  
|                                                     |  |                                                      |        |  |      |   |        |      |  |   |        |   |  |      |        |   |  |   |         |  
|Ratio of Earnings to Fixed Charges(1)                |  |                                                      | 1.12x  |  |      |   | 1.06x  |      |  |   | 0.87x  |   |  |      | 1.16x  |   |  |   | 0.70x   |  



|(1) | For the years ended December 31, 2008 and 2006, we had a deficiency of $3,944 and $10,215, respectively, in earnings to fixed charges.
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