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Guarantees (Changes in liabilty of estimated loss from credit recourse agreement) (Details) - USD ($)
$ in Thousands
3 Months Ended 9 Months Ended
Sep. 30, 2015
Sep. 30, 2014
Sep. 30, 2015
Sep. 30, 2014
Movement In Guaranteed Benefit Liability Gross Roll Forward        
Balance at beginning of the period $ 289 $ 1,310 $ 927 $ 1,955
Additions from acquisition 0 0    
Net charge-off/terminations 140 (232) (498) (877)
Balance at the end of the period $ 429 $ 1,078 $ 429 $ 1,078