Fair Value Disclosures (Tables)

3 Months Ended

Mar. 31, 2013

Fair Value Disclosures [Abstract]

Schedule of Fair Value, Assets and Liabilities Measured on Recurring Basis [Table Text Block]

Assets and liabilities recorded at fair value on a recurring basis are as follows.

			Quoted Prices in		Significant		Significant
			Active Markets		Other		Other
	Balance as of		for Identical		Observable		Unobservable
	March 31,		Assets		Inputs		Inputs
	2013		(Level 1)		(Level 2)		(Level 3)
Debt securities available for sale:
U.S. Government agencies	$	3,967,001	$	-	$	3,967,001	$	-
State and municipal securities		23,362,963		-		23,362,963		-
Mortgage-backed securities:
Residential mortgage loans guaranteed by GNMA or FNMA		8,701,228		-		8,701,228		-
Collateralized mortgage obligations issued or guaranteed by U.S. Government agencies or sponsored agencies		55,094,637		-		55,094,637		-
Total securities available for sale	$	91,125,829	$	-	$	91,125,829	$	-
Cash surrender value of life insurance	$	1,207,962	$	-	$	1,207,962	$	-

			Quoted Prices in		Significant		Significant
			Active Markets		Other		Other
	Balance as of		for Identical		Observable		Unobservable
	December 31,		Assets		Inputs		Inputs
	2012		(Level 1)		(Level 2)		(Level 3)
Debt securities available for sale:
U.S. Government agencies	$	4,018,151	$	-	$	4,018,151	$	-
State and municipal securities		23,633,317		-		23,633,317		-
Mortgage-backed securities:
Residential mortgage guaranteed by GNMA or FNMA		9,222,419		-		9,222,419		-
Collateralized mortgage obligations issued or guaranteed by U.S. Government agencies or sponsored agencies		39,222,759		-		39,222,759		-
Total securities available for sale	$	76,096,646	$	-	$	76,096,646	$	-
Cash surrender value of life insurance	$	1,199,725	$	-	$	1,199,725	$	-

Fair Value, Assets and Liabilities Measured on Nonrecurring Basis [Table Text Block]

The tables below present information about assets and liabilities on the balance sheet at March 31, 2013 and December 31, 2012 for which a nonrecurring change in fair value was recorded (amounts in thousands).

			Quoted Prices in		Significant		Significant
			Active Markets		Other		Other
	Balance as of		for Identical		Observable		Unobservable
	March 31,		Assets		Inputs		Inputs
	2013		(Level 1)		(Level 2)		(Level 3)
Impaired loans	$	3,689	$	-	$	3,689	$	-
Foreclosed assets (OREO & Repossessions)		21,159		-		21,159		-

			Quoted Prices in		Significant		Significant
			Active Markets		Other		Other
	Balance as of		for Identical		Observable		Unobservable
	December 31,		Assets		Inputs		Inputs
	2012		(Level 1)		(Level 2)		(Level 3)
Impaired loans	$	4,869	$	-	$	4,869	$	-
Foreclosed assets (OREO & Repossessions)		20,332		-		20,332		-

Fair Value, by Balance Sheet Grouping [Table Text Block]

The carrying amount and estimated fair value of Cornerstone's financial instruments at March 31, 2013 and December 31, 2012 are as follows (in thousands):

	March 31, 2013				December 31, 2012
	Carrying		Estimated		Carrying		Estimated
	Amount		Fair Value		Amount		Fair Value
Assets:
Cash and cash equivalents	$	35,901	$	35,901	$	59,395	$	59,395
Securities		91,168		91,170		76,142		76,143
Federal Home Loan Bank stock		2,323		2,323		2,323		2,323
Loans, net		266,881		267,312		270,850		271,128
Cash surrender value of life insurance		1,208		1,208		1,200		1,200
Accrued interest receivable		1,323		1,323		1,214		1,214
Liabilities:
Noninterest-bearing demand deposits		55,400		55,400		60,054		60,054
Interest-bearing demand deposits		26,547		26,547		30,179		30,179
Savings deposits and money market accounts		89,564		89,564		80,994		80,994
Time deposits		165,391		165,641		173,654		175,177
Federal funds purchased and securities sold under agreements to repurchase		21,150		21,150		19,587		19,587
Federal Home Loan Bank advances and other borrowings		31,740		31,740		37,175		37,175
Accrued interest payable		91		91		121		121
Unrecognized financial instruments
(net of contract amount):
Commitments to extend credit		-		-		-		-
Letters of credit		-		-		-		-
Lines of credit		-		-		-		-