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Transactions With Related Parties (Details) (USD $)
12 Months Ended
Dec. 31, 2013
Dec. 31, 2012
Dec. 31, 2011
Related Party Transaction [Line Items]      
Investment banking services from related party $ 0 $ 0 $ 818,000
Member Of Board Of Directors [Member]
     
Related Party Transaction [Line Items]      
Repurchases of common stock 321,000 794,000 2,900,000
Revenue from related parties 353,000 267,000 198,000
Purchases from related party transactions 47,000 22,000 45,000
Son Of Member Of Board Of Directors [Member]
     
Related Party Transaction [Line Items]      
Revenue from related parties $ 345,000 $ 312,000 $ 219,000
Maximum [Member]
     
Related Party Transaction [Line Items]      
Percentage of commisions included in stock repurchases 1.00% 1.00% 1.00%