Stockholders' Equity (Stock Transactions - Narrative) (Details) (USD $)	3 Months Ended			0 Months Ended
	Mar. 31, 2014	Mar. 31, 2013	Mar. 31, 2014 At The Market Equity Offering Program [Member] investment_bank	Apr. 29, 2014 Subsequent Event
Class of Stock [Line Items]
Equity Offering Program, Number of Investment Banks in Sales Agreements			4
Equity Offering Program, Shares Authorized to be Sold			9,000,000
Number of Authorized Shares Remaining Under Offering Program			5,391,400
Dividends per share paid to common stockholders (in dollars per share)	$ 0.3
Dividends per share declared to common stockholders (in dollars per share)	$ 0.30	$ 0.30		$ 0.30