Stockholders' Equity (Schedule of Dividend Increases) (Details) - $ / shares	1 Months Ended
	Apr. 30, 2015	Apr. 30, 2014
Schedule of Dividend Increases [Line Items]
Common stock, dividends, rate increase, percent	20.00%	39.00%
Quarterly [Member]
Schedule of Dividend Increases [Line Items]
Common stock, dividends, per share, declared	$ 0.30	$ 0.25
Annual [Member]
Schedule of Dividend Increases [Line Items]
Common stock, dividends, per share, declared	$ 1.2	$ 1