Consolidated Statement Of Operations (USD $) In Thousands, except Per Share data, unless otherwise specified	3 Months Ended
	Mar. 31, 2013	Mar. 31, 2012
INVESTMENT INCOME
Interest income	$ 18,382	$ 15,733
EXPENSES
Base management fee	1,967	1,492
Incentive fee	2,055	0
Share-based LTIP expense	42	28
Interest expense	2,142	1,832
Professional fees	440	278
Compensation expense	328	375
Insurance expense	180	177
Agency and administration fees	264	213
Custody and other fees	318	304
Directors' fees and expenses	77	74
Total expenses	7,813	4,773
NET INVESTMENT INCOME	10,569	10,960
Net realized gain (loss) on:
Investments	13,997	8,147
Swaps	(1,383)	(19,928)
Futures	(22)	(8)
Total net realized gain (loss) on investments and financial derivatives	12,592	(11,789)
Change in net unrealized gain (loss) on:
Investments	22,839	18,130
Swaps	(5,276)	14,817
Futures	22	(63)
Total net unrealized gain (loss) on investments and financial derivatives	17,585	32,884
NET REALIZED AND UNREALIZED GAIN (LOSS) ON INVESTMENTS AND FINANCIAL DERIVATIVES	30,177	21,095
Net Income (Loss), Including Portion Attributable to Noncontrolling Interest	40,746	32,055
Net Income (Loss) Attributable to Noncontrolling Interest	411	0
Net Income (Loss) Attributable to Parent	$ 40,335	$ 32,055
NET INCREASE (DECREASE) IN SHAREHOLDERS' EQUITY RESULTING FROM OPERATIONS PER SHARE:
Basic and Diluted (in usd per share)	$ 1.94	$ 1.90