Summary of Significant Accounting Policies Summary of Significant Accounting Policies 4 (Details) $ in Thousands	Dec. 31, 2015 USD ($) trust_accounts	Dec. 31, 2014 USD ($) trust_accounts
Organization, Consolidation and Presentation of Financial Statements [Abstract]
Number of Trust Accounts managed or administered | trust_accounts	1,346	1,478
Value of Trust Accounts | $	$ 794,000	$ 757,300