Securities (Tables)

6 Months Ended

Jun. 30, 2012

Securities [Abstract]

Summary Of Securities

	Current				Noncurrent
	June 30, 2012		Dec. 31, 2011		June 30, 2012		Dec. 31, 2011
Aggregate fair value	$	6,973,582	$	5,094,703	$	4,822,928	$	4,755,809
Gross unrealized holding gains		-7,440		-4,929		-1,299		-12,995
Gross unrealized holding losses		8		857		5,486		1,192
Amortized cost basis		6,966,150		5,090,631		4,827,115		4,744,006
Accrued interest		16,143		17,676		15,047		15,066
Amounts shown on balance sheets	$	6,982,293	$	5,108,307	$	4,842,162	$	4,759,072