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Transactions With Related Parties (Details) (USD $)	12 Months Ended
Transactions With Related Parties (Details) (USD $)	Dec. 31, 2012	Dec. 31, 2011	Dec. 31, 2010
Related Party Transaction [Line Items]
Investment banking services from related party		$ 818,000
Member Of Board Of Directors [Member]
Related Party Transaction [Line Items]
Repurchases of common stock	794,000	2,900,000	750,000
Revenue from related parties	267,000	198,000	390,000
Purchases from related party transactions	22,000	45,000	22,000
Son Of Member Of Board Of Directors [Member]
Related Party Transaction [Line Items]
Revenue from related parties	$ 312,000	$ 219,000	$ 189,000
Maximum [Member]
Related Party Transaction [Line Items]
Percentage of cost of stock and commisions included in stock repurchases	1.00%	1.00%	1.00%

Amount of transactions with related party during the financial reporting period.

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- Definition

Amount of revenue, fees and commissions earned from transactions between (a) a parent company and its subsidiaries; (b) subsidiaries of a common parent; (c) an entity and trusts for the benefit of employees, for example, but not limited to, pension and profit-sharing trusts that are managed by or under the trusteeship of the entity's management; (d) an entity and its principal, owners, management, or members of their immediate families; and (e) affiliates.

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