Financial Highlights (Net Investment Income Ratio To Average Equity) (Details)	3 Months Ended				6 Months Ended
	Jun. 30, 2014		Jun. 30, 2013		Jun. 30, 2014		Jun. 30, 2013
Financial Highlights [Abstract]
Net Investment Income	8.27%	[1],[2],[3]	9.00%	[1],[2],[3]	8.67%	[1],[2],[3]	8.83%	[1],[2],[3]

[1] Includes all items of income and expense on an annualized basis except for incentive fee expense which is included on a non-annualized basis.

[2] Includes incentive fee in calculation which can vary substantially over periods.

[3] Average equity is calculated using month end values.