Guarantees and Indemnifications Guarantees (Details) - USD ($) $ in Thousands	Mar. 31, 2017	Dec. 31, 2016
Guarantees [Abstract]
Total of Loans Covered by Guarantees	$ 31,900	$ 27,600
Total of Guaranteed Loans Inquired About	800	900
Total Loans Indemnified to third parties	1,400	1,600
Loan Repurchase Guarantee Liability	$ 800	$ 900