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Deposit contracts (Tables)
 9 Months Ended
Sep. 30, 2014
Deposit Contracts, Liabilities [Abstract]  
Schedule of deposit contracts
The following table represents activity in the deposit liabilities for the nine months ended September 30, 2014 and the year ended December 31, 2013:

September 30,
2014
 
December 31,
2013

($ in thousands)
Balance, beginning of period
$
120,946

 
$
50,446

Consideration received
6,132

 
66,369

Consideration receivable
12,266

 
—

Net investment expense allocation and change in fair value of embedded derivatives
3,996

 
4,731

Payments
(350
)
 
(600
)
Balance, end of period
$
142,990

 
$
120,946