Consolidated Balance Sheets (Parenthetical) - USD ($)	12 Months Ended
	Dec. 31, 2016	Dec. 31, 2015
Available-for-sale Securities Pledged as Collateral (in dollars)	$ 876,121,505	$ 571,086,035
Loans Pledged as Collateral	$ 0	$ 10,900,402
Preferred Stock, Par Value (in dollars per share)	$ 0.01	$ 0.01
Preferred Stock, Shares Authorized	50,000,000	50,000,000
Preferred Stock, Dividend Rate, Percentage	8.75%	8.75%
Preferred Stock, Liquidation Preference, Value (in dollars)	$ 25	$ 25
Preferred Stock, Shares Issued	1,610,000	1,610,000
Preferred Stock, Shares Outstanding	1,610,000	1,610,000
Common stock, par value (in dollars per share)	$ 0.01	$ 0.01
Common stock, shares authorized	450,000,000	450,000,000
Common stock, shares issued	17,539,258	14,656,394
Common stock, shares outstanding	17,539,258	14,656,394
Variable Interest Entity, Consolidated, Carrying Amount, Assets (in dollars)	$ 1,369,120,941	$ 1,868,482,556
Variable Interest Entity, Consolidated, Carrying Amount, Liabilities (in dollars)	$ 1,344,404,080	$ 1,750,916,265