Condensed Consolidated Statements of Operations (USD $) In Thousands, except Per Share data, unless otherwise specified	3 Months Ended
	Mar. 31, 2013	Mar. 31, 2012
Revenues:
Loan interest income	$ 98,261	$ 104,094
Securities interest income	14,862	22,576
Oil and gas revenue	23,805	11,053
Other	3,522	211
Total revenues	140,450	137,934
Investment costs and expenses:
Provision for loan losses	11,068	46,498
Oil and gas production costs	7,908	2,873
Oil and gas depreciation, depletion and amortization	8,988	3,181
Other	1,288	1,666
Total investment costs and expenses	81,049	107,792
Other income:
Net realized and unrealized gain on investments	94,727	66,542
Net realized and unrealized (loss) gain on derivatives and foreign exchange	(8,852)	9,149
Net loss on restructuring and extinguishment of debt	(20,269)	(445)
Other income	8,614	3,592
Total other income	74,220	78,838
Other expenses:
Related party management compensation	28,306	18,113
General, administrative and directors expenses	4,794	4,991
Professional services	1,727	1,896
Total other expenses	34,827	25,000
Income before income taxes	98,794	83,980
Income tax expense (benefit)	458	(4,068)
Net income	98,336	88,048
Preferred share distributions	6,738
Net income available to common shareholders	91,598	88,048
Net income per common share:
Basic (in dollars per share)	$ 0.46	$ 0.49
Diluted (in dollars per share)	$ 0.46	$ 0.48
Weighted average number of common shares outstanding:
Basic (in shares)	197,153	177,775
Diluted (in shares)	197,153	182,247
Affiliates
Investment costs and expenses:
Interest expense	9,917	12,859
Nonaffiliates
Investment costs and expenses:
Interest expense	$ 41,880	$ 40,715