Consolidated Statement Of Operations (USD $) In Thousands, except Per Share data, unless otherwise specified	12 Months Ended
	Dec. 31, 2012	Dec. 31, 2011	Dec. 31, 2010
INVESTMENT INCOME
Interest income	$ 63,857	$ 63,540	$ 45,627
EXPENSES
Base management fee	6,835	5,744	4,910
Incentive fee	19,145	612	4,428
Share-based LTIP expense	135	147	1,987
Interest expense	7,799	6,647	3,826
Professional fees	1,386	1,630	1,952
Compensation expense	1,308	1,235	935
Insurance expense	720	711	1,114
Agency and administration fees	923	915	743
Custody and other fees	1,154	954	682
Directors' fees and expenses	265	250	263
Total expenses	39,670	18,845	20,840
NET INVESTMENT INCOME	24,187	44,695	24,787
Net realized gain (loss) on:
Investments	23,550	10,524	23,670
Swaps	(34,746)	17,400	5,761
Futures	(51)	(1,093)	(3,689)
Purchased Options	0	0	(581)
Total net realized gain (loss) on investments and financial derivatives	(11,247)	26,831	25,161
Change in net unrealized gain (loss) on:
Investments	70,789	(39,321)	5,085
Swaps	13,499	(22,780)	(15,186)
Futures	(82)	902	182
Purchased Options	0	0	542
Total net unrealized gain (loss) on investments and financial derivatives	84,206	(61,199)	(9,377)
NET REALIZED AND UNREALIZED GAIN (LOSS) ON INVESTMENTS AND FINANCIAL DERIVATIVES	72,959	(34,368)	15,784
Net increase in shareholders’ equity resulting from operations	$ 97,146	$ 10,327	$ 40,571
NET INCREASE (DECREASE) IN SHAREHOLDERS' EQUITY RESULTING FROM OPERATIONS PER SHARE:
Basic and Diluted (in usd per share)	$ 5.31	$ 0.61	$ 3.04