Subsequent Events (Details Textual) (USD $) In Millions, except Per Share data, unless otherwise specified	3 Months Ended		1 Months Ended
	Mar. 31, 2015	Mar. 31, 2014	Mar. 25, 2015	Apr. 17, 2015
Subsequent Event [Line Items]
Common Stock, Dividends, Per Share, Declared	$ 0.2	$ 0
Common Class A [Member]
Subsequent Event [Line Items]
Common Stock, Dividends, Per Share, Declared			$ 0.20
Common Class B [Member]
Subsequent Event [Line Items]
Common Stock, Dividends, Per Share, Declared			$ 0.20
Subsequent Event [Member]
Subsequent Event [Line Items]
Dividends				$ 1.2