Fair Value (Details) - Narrative - USD ($) $ in Thousands	Dec. 31, 2016	Dec. 31, 2015	Dec. 31, 2014
Fair Value [Line Items]
Total amount of loans being serviced for the benefit of others at the end of the year	$ 640,530	$ 242,915	$ 220,372
Loans serviced for others	$ 305,500
Minimum
Fair Value [Line Items]
Appraisal adjustment (percent)	0.00%
Maximum
Fair Value [Line Items]
Appraisal adjustment (percent)	15.00%