Mortgage Loans (Parenthetical Information) (Details) (USD $)	3 Months Ended	6 Months Ended
Jun. 30, 2014	Jun. 30, 2013	Jun. 30, 2014	Jun. 30, 2013
Mortgage Loans [Abstract]
Change in unrealized gain or loss on mortgage loans	$ 21,960,921	$ 1,596,197	$ 22,650,525	$ 1,567,291
Threshold period past due after which loans are considered considered non-performing			60 days

Threshold period past due for financing receivable to write off as uncollectible, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days.

No definition available.

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Data Type:	xbrli:durationItemType
Balance Type:	na
Period Type:	duration