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Loans Held for Sale Summary of Changes in Valuation Allowance of Loans Held for Sale (Details) - USD ($)
$ in Thousands
12 Months Ended
Dec. 31, 2016
Dec. 31, 2015
Dec. 31, 2014
Receivables [Abstract]      
Beginning balance $ 14,658 $ 49,676 $ 30,711
Provision 3,599 (400) (1,301)
Transfer from liability for indemnification obligations 2,368 1,180 20,441
Sales of loans (10,208) (37,776) (7,614)
Other (353) 1,978 7,439
Ending balance $ 10,064 $ 14,658 $ 49,676