Stockholders' Equity (Schedule of Dividend Increases) (Details) (USD $)	1 Months Ended
	Apr. 30, 2014	Jul. 31, 2013	Apr. 30, 2013
Schedule of Dividend Increases [Line Items]
Common stock, dividends, rate increase, percent	39.00%	100.00%	20.00%
Quarterly [Member]
Schedule of Dividend Increases [Line Items]
Common stock, dividends, per share, declared	$ 0.250	$ 0.18	$ 0.09
Annual [Member]
Schedule of Dividend Increases [Line Items]
Common stock, dividends, per share, declared	$ 1	$ 0.72	$ 0.36