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Stockholders' Equity (Tables) | 12 Months Ended
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Dec. 31, 2012
Stockholders' Equity Note [Abstract] |
Schedule of Treasury Stock by Class | Following are our monthly stock repurchases for the fourth quarter of fiscal year 2012, all of which were purchased as part of publicly announced plans or programs:
| Total Number of Shares Purchased | Average Price paid per Share | Approximate Dollar Value of Shares that May Yet be Purchased under the Program
November 16, 2012 - November 30, 2012 | 256,262 |  | $ | 21.58 |  | $ | 94,470,000 |
December 1, 2012 - December 31, 2012 | 873,146 |  | $ | 24.26 |  | $ | 73,268,000 |
| 1,129,408 |  | $ | 23.65 |  |

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- Definition Tabular disclosure of an entity's treasury stock, including the average cost per share, carrying basis for each class of treasury stock, description of share repurchase program authorized by an entity's board of directors, the number of shares repurchased, the cost of the shares repurchased, the remaining maximum dollar value of shares available for repurchase under the program, the treatment of the purchase price in excess of the current market value, number of shares held for each class of treasury stock, and other information necessary to a fair presentation. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 505 -SubTopic 30 -Section 50 -Paragraph 3 -URI http://asc.fasb.org/extlink&oid=6405834&loc=d3e23309-112656 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 505 -SubTopic 30 -Section 50 -Paragraph 2 -URI http://asc.fasb.org/extlink&oid=6405834&loc=d3e23285-112656 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 505 -SubTopic 30 -Section 50 -Paragraph 4 -URI http://asc.fasb.org/extlink&oid=6405834&loc=d3e23315-112656 Reference 4: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 505 -SubTopic 30 -Section 45 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=6405813&loc=d3e23239-112655 + Details
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