Investments (Details) (USD $)	12 Months Ended
Dec. 31, 2012	Dec. 31, 2011
Details
Held-to-maturity Securities, Debt Maturities, Net Carrying Amount	$ 7,725,000	$ 8,863,000
Held-to-maturity Securities, Gross Gains (Losses), Derivatives	2,571	0
Held-to-maturity Securities, Sold Security, at Carrying Value	0	0
Held-to-maturity Securities Pledged as Collateral	$ 10,041,655	$ 17,953,933

Carrying amount of debt securities accounted for as held-to-maturity, net of adjustments including, but not limited to, accretion, amortization, collection of cash, previous other-than-temporary impairments (OTTI) recognized, and fair value hedge accounting adjustments.

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Statement of Financial Accounting Standard (FAS)

-Number 115

-Paragraph 20

-LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy.

Reference 2: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 320

-SubTopic 10

-Section 50

-Paragraph 5

-Subparagraph (d)

-URI http://asc.fasb.org/extlink&oid=6872113&loc=d3e27232-111563

Name:	us-gaap_HeldToMaturitySecuritiesDebtMaturitiesNetCarryingAmount
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant