Guarantees and Indemnifications Guarantees (Details) - USD ($) $ in Thousands	Dec. 31, 2018	Dec. 31, 2017
Guarantees [Abstract]
Total of Loans Covered by Guarantees	$ 63,600	$ 46,774
Total of Guaranteed Loans Inquired About	550	1,170
Total Loans Indemnified to third parties	1,035	1,300
Loan Repurchase Guarantee Liability	$ 560	$ 810