Securities (Tables)

3 Months Ended

Mar. 31, 2013

Securities [Abstract]

Summary Of Securities

	Current				Noncurrent
	March 31, 2013		Dec. 31, 2012		March 31, 2013		Dec. 31, 2012
Aggregate fair value	$	4,821,329	$	8,416,447	$	3,315,697	$	4,282,664
Gross unrealized holding gains		-2,595		-3,707		-832		-698
Gross unrealized holding losses		—		—		297		1,405
Amortized cost basis		4,818,734		8,412,740		3,315,162		4,283,371
Accrued interest		10,513		15,067		7,656		12,086
Amounts shown on balance sheets	$	4,829,247	$	8,427,807	$	3,322,818	$	4,295,457