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Bank segment - Troubled debt restructuring that subsequently defaulted (Details)
$ in Thousands
3 Months Ended
Mar. 31, 2016
USD ($)
contract
Financing Receivable, Modifications [Line Items]  
Number of contracts | contract 1
Recorded investment | $ $ 488
Home equity line of credit  
Financing Receivable, Modifications [Line Items]  
Number of contracts | contract 1
Recorded investment | $ $ 488