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Benefit Plans - Bank-Owned Life Insurance, Non-Equity Incentive Plan (Details) (USD $)	1 Months Ended	3 Months Ended		12 Months Ended
	Aug. 31, 2006	Jun. 30, 2001	Mar. 31, 2000	Dec. 31, 2012	Dec. 31, 2011
Deferred Compensation Arrangement with Individual, Postretirement Benefits [Line Items]
Investment in bank-owned life insurance				$ 26,432,999	$ 25,934,220
Incentive compensation expense				0	0
Officers \| Bank-Owned Life Insurance
Deferred Compensation Arrangement with Individual, Postretirement Benefits [Line Items]
Bank owned life insurance, percentage interest owned in cash surrender value				100.00%
Bank owned life insurance, employer contribution	5,500,000	5,000,000	4,800,000
Liability determination, cost of insurance method, discount rate				4.00%	4.00%
Bank owned life insurance, liability				1,900,000	1,500,000
Bank owned life insurance, net periodic benefit costs				376,000	334,000
Bank owned life insurance, plan termination, resultant decrease in liability					$ 500,000

The carrying amount of a life insurance policy on an officer, executive or employee for which the reporting entity (a bank) is entitled to proceeds from the policy upon death of the insured or surrender of the insurance policy.

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- Definition

The compensation expense recognized during the period pertaining to the deferred compensation arrangement.

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- Definition

The carrying amount of the liability as of the balance sheet date to an individual under a deferred compensation arrangement. This amount may be the result of periodic accruals made over the period of active employment, or reflect termination benefits resulting contractual terms or a death benefit.

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