Statement Of Stockholders' Equity (USD $)	Common Stock [Member]	Accumulated Other Comprehensive Income (Loss) [Member]	Retained Earnings [Member]	Total
Balance, January 1, 2011 at Dec. 31, 2010	$ 459,644	$ 6,835	$ 12,580,394	$ 13,046,873
Balance, January 1, 2011 (in Shares) at Dec. 31, 2010	4,596,439
Change in unrealized gains on marketable securities, net of deferred income tax		27,777		27,777
Net income			4,716,530	4,716,530
Dividends declared			(3,677,151)	(3,677,151)
Balance at Dec. 31, 2011	459,644	34,612	13,619,773	14,114,029
Balance (in Shares) at Dec. 31, 2011	4,596,439
Change in unrealized gains on marketable securities, net of deferred income tax		144,367		144,367
Net income			4,830,780	4,830,780
Dividends declared			(6,251,158)	(6,251,158)
Balance at Dec. 31, 2012	$ 459,644	$ 178,979	$ 12,199,395	$ 12,838,018
Balance (in Shares) at Dec. 31, 2012	4,596,439