Stockholders' Equity Dividends Declared (Details) (USD $) In Thousands, except Per Share data, unless otherwise specified	3 Months Ended		0 Months Ended
	Mar. 31, 2015	Mar. 31, 2014	Mar. 06, 2015	Feb. 05, 2015	Nov. 28, 2014	Feb. 24, 2014
Dividends Declared [Line Items]
Common Stock, Dividends, Per Share, Declared	$ 0.05	$ 0.04
Common Class A [Member]
Dividends Declared [Line Items]
Common Stock, Dividends, Per Share, Declared				$ 0.05		$ 0.04
Dividends, Common Stock, Cash			$ 1,073		$ 832