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Federal Home Loan Bank Advances, Notes and Other Borrowings Notes payable and other borrowings table (Tables)
 12 Months Ended
Dec. 31, 2016
Debt Disclosure [Abstract]  
Schedule of Debt [Table Text Block]
At December 31, 2016 and 2015 outstanding senior notes payable and other borrowings consisted of the following (dollars in thousands):
 
2016
 
2015
Principal amount of 4.875% senior notes
$
400,000

 
$
400,000

Unamortized discount and debt issuance costs
(6,908
)
 
(7,674
)
 
393,092

 
392,326

Capital lease obligations
9,717

 
10,219

 
$
402,809

 
$
402,545