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Restricted Cash (Details) (USD $)	Dec. 31, 2012	Dec. 31, 2011
Restricted Cash
Statutory liability deposit	$ 106,000	$ 104,000
Surety bonds		1,800,000
Standby letters of credit issued under the credit line		$ 3,600,000

Amount of cash subject to withdrawal restrictions, restricted deposits held as compensating balances, and cash and securities segregated in compliance with regulations (such as cash deposited in a special reserve account for the exclusive benefit of customers).

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