Condensed Consolidated Statements of Comprehensive Income (Loss) (USD $)	3 Months Ended
	Mar. 31, 2015	Mar. 31, 2014
Net income (loss)	$ (5,130,327)	$ (2,541,274)
Other comprehensive income (loss):
Increase (decrease) in net unrealized gain on available-for-sale securities, net	2,555,987	6,841,785
Reclassification adjustment for net gain (loss) included in net income	0	5,563,982
Reclassification adjustment for other-than-temporary impairments included in net income	4,868,428	0
Reclassification cumulative adjustment for Linked Transactions	4,457,544	0
Total other comprehensive income (loss)	11,881,959	12,405,767
Less: Dividends to preferred stockholders	(880,509)	(480,573)
Comprehensive income (loss) attributable to common stockholders	$ 5,871,123	$ 9,383,920