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Stockholders' Equity (Shares repurchased under the stock repurchase program) (Details) (USD $) In Thousands, except Share data, unless otherwise specified |  |  | 9 Months Ended
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Sep. 30, 2014 | Dec. 31, 2013 | Sep. 30, 2014 January 2014 [Member] | Sep. 30, 2014 February 2014 [Member] | Sep. 30, 2014 Third Quarter [Member] | Sep. 30, 2014 August 2014 [Member]
Equity, Class of Treasury Stock [Line Items] |  |  |  |  |  |
Common shares repurchased as part of the stock repurchase program (Shares) |  |  | 57,700 | 649,700 | 707,500 | 100
Treasury Stock Acquired, Average Cost Per Share |  |  | $ 14.73 | $ 14.66 | $ 14.66 | $ 15.50
Treasury Stock, Value | $ 90,652 | $ 80,642 | $ 850 | $ 9,522 | $ 10,374 | $ 2

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- Definition The number of shares authorized to be repurchased by an entity's Board of Directors under a stock repurchase plan. + References No definition available. + Details
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- Definition Total cost of shares repurchased divided by the total number of shares repurchased. + References Reference 1: 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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- Definition The amount allocated to treasury stock. Treasury stock is common and preferred shares of an entity that were issued, repurchased by the entity, and are held in its treasury. + References Reference 1: 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 + Details
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