Subsequent Events (Details Textual) (USD $) In Millions, except Per Share data, unless otherwise specified	3 Months Ended		6 Months Ended				0 Months Ended	1 Months Ended
	Jun. 30, 2014	Jun. 30, 2013	Jun. 30, 2014	Jun. 30, 2013	Jun. 30, 2014 Common Class A [Member]	Jun. 30, 2014 Common Class B [Member]	Jul. 11, 2014 Subsequent Event [Member]	Jul. 31, 2014 Subsequent Event [Member] Revolving Credit Facility [Member]
Subsequent Event [Line Items]
Common Stock, Dividends, Per Share, Declared	$ 0.20	$ 0	$ 0.20	$ 0	$ 0.20	$ 0.20
Dividends							$ 1.1
Repayments of Lines of Credit								$ 5