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