Consolidated Balance Sheets (Parenthetical) (USD $)	Jun. 30, 2011	Dec. 31, 2010
Amortized cost	$ 116,259,839	$ 123,301,280
Common stock, shares authorized	10,000,000	10,000,000
Common stock, shares issued	5,333,159	5,333,081
Common stock, shares outstanding	5,333,159	5,333,081