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Deposits (Deposit Account Balances) (Details) - USD ($)
$ in Thousands
Jun. 30, 2015
Dec. 31, 2014
Banking and Thrift [Abstract]    
Non-interest-bearing demand $ 262,115 $ 269,466
Interest-bearing negotiable orders of withdrawal (NOW) 159,937 124,961
Savings and money market 982,793 873,094
Certificates of deposit 575,254 353,144
Total deposits $ 1,980,099 $ 1,620,665