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Earnings Per Share (Details Textual) - USD ($) $ / shares in Units, $ in Thousands | 12 Months Ended |  |  |
--- | --- | --- | --- | ---
Dec. 31, 2015 | Dec. 31, 2014 | Dec. 31, 2013 | Feb. 10, 2016 | Dec. 10, 2015 | Jul. 30, 2015
Earnings Per Share [Line Items] |  |  |  |  |  |
Payments for Repurchase of Common Stock | $ 27,582 | $ 16,447 | $ 542 |  |  |
Share Repurchase Program [Member] |  |  |  |  |  |
Earnings Per Share [Line Items] |  |  |  |  |  |
Stock Repurchased During Period, Shares | 1,183,862 |  |  |  |  |
Treasury Stock Acquired, Average Cost Per Share | $ 22.84 |  |  |  |  |
Stock Repurchase Program, Authorized Amount |  |  |  |  | $ 67,500 | $ 42,500
Adjustments To Additional Paid In Capital Under Stock Repurchased Costs | $ 27,000 |  |  |  |  |
Stock Repurchase Program, Remaining Authorized Repurchase Amount | 24,800 |  |  |  | $ 25,000 | $ 25,000
Payments for Repurchase of Common Stock | $ 26,100 |  |  |  |  |
Share Repurchase Program [Member] | Subsequent Event [Member] |  |  |  |  |  |
Earnings Per Share [Line Items] |  |  |  |  |  |
Stock Repurchase Program, Authorized Amount |  |  |  | $ 142,500 |  |
Stock Repurchase Program, Remaining Authorized Repurchase Amount |  |  |  | $ 75,000 |  |

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- Definition Represents the amount of decrease in additional paid in capital (APIC) resulting from direct costs associated with the repurchase of stock. + References No definition available. + Details
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- Definition The cash outflow to reacquire common stock during the period. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 15 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=56944662&loc=d3e3291-108585 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Glossary Financing Activities -URI http://asc.fasb.org/extlink&oid=6513228 + Details
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- Definition Amount of stock repurchase plan authorized. + References No definition available. + Details
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- Definition Amount remaining of a stock repurchase plan authorized. + References No definition available. + Details
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- Definition Number of shares that have been repurchased during the period and have not been retired and are not held in treasury. Some state laws may govern the circumstances under which an entity may acquire its own stock and prescribe the accounting treatment therefore. This element is used when state law does not recognize treasury stock. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 505 -SubTopic 10 -Section 50 -Paragraph 2 -URI http://asc.fasb.org/extlink&oid=6928386&loc=d3e21463-112644 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 04 -Article 3 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 02 -Paragraph 29, 30 -Article 5 + 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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