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Subsequent Events (Details) $ / shares in Units, $ in Millions |  |  | 3 Months Ended |
--- | --- | --- | --- | ---
Apr. 22, 2016 $ / shares shares | Apr. 15, 2016 USD ($) $ / shares | Mar. 31, 2016 $ / shares shares | Mar. 31, 2015 $ / shares | Dec. 31, 2015 $ / shares shares
Subsequent Event [Line Items] |  |  |  |  |
Common Stock, Par or Stated Value Per Share |  |  | $ 0.01 |  | $ 0.01
Preferred Stock, Shares Authorized | shares |  |  | 5,000,000 |  | 5,000,000
Common Stock, Dividends, Per Share, Declared |  |  | $ 0.45 | $ 0.40 |
Subsequent Event |  |  |  |  |
Subsequent Event [Line Items] |  |  |  |  |
Common Stock, Par or Stated Value Per Share | $ 0.01 |  |  |  |
Common Stock, Dividends, Per Share, Declared |  | $ 0.45 |  |  |
Cash dividends declared | $ |  | $ 8.1 |  |  |
Series A Junior Participating Preferred Stock | Subsequent Event |  |  |  |  |
Subsequent Event [Line Items] |  |  |  |  |
Preferred Stock, Rights Conversion Ratio into Preferred Stock | 1 |  |  |  |
Preferred Stock, Par or Stated Value Per Share | $ 0.01 |  |  |  |
Preferred Stock, Shares Authorized | shares | 900,000 |  |  |  |
Preferred Stock, Redemption Price Per Share | $ 400.00 |  |  |  |
Preferred Stock, Rights Waiting Period, Duration Before Exercisable After Public Announcement | 10 days |  |  |  |
Preferred Stock, Rights Waiting Period, Duration Before Exercisable After Tender or Exchange Offer Results in Becoming an Acquiring Person | 10 days |  |  |  |

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- Definition Preferred Stock, Rights Waiting Period, Duration Before Exercisable After Tender or Exchange Offer Results in Becoming an Acquiring Person + References No definition available. + Details
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- Definition Aggregate dividends declared during the period for each share of common stock outstanding. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 505 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.3-04) -URI http://asc.fasb.org/extlink&oid=27012166&loc=d3e187085-122770 + Details
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- Definition Amount of paid and unpaid cash, stock, and paid-in-kind (PIK) dividends declared, for example, but not limited to, common and preferred stock. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 505 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.3-04) -URI http://asc.fasb.org/extlink&oid=27012166&loc=d3e187085-122770 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 942 -SubTopic 405 -Section 45 -Paragraph 2 -URI http://asc.fasb.org/extlink&oid=6957935&loc=d3e64057-112817 + Details
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