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Stockholders' Equity (Shares repurchased under the stock repurchase program) (Details) - USD ($) $ in Thousands | Mar. 31, 2017 | Dec. 31, 2016
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Equity, Class of Treasury Stock [Line Items] |  |
Treasury Stock, Value | $ 104,502 | $ 104,860

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- Definition Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table. + References No definition available. + 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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