Revenue Recognition Contract Assets and Liabilities (Details) - USD ($) $ in Thousands	Dec. 31, 2018	Jan. 01, 2018
Contracts with Customers Assets and Liabilities [Line Items]
Contract with Customer, Asset, Net	$ 23,680	$ 21,029
Contract with Customer, Liability	318	0
Commission [Member]
Contracts with Customers Assets and Liabilities [Line Items]
Contract with Customer, Asset, Net	3,738	2,007
Mutual Fund Income [Member]
Contracts with Customers Assets and Liabilities [Line Items]
Contract with Customer, Asset, Net	7,241	7,779
Advisory Fees [Member]
Contracts with Customers Assets and Liabilities [Line Items]
Contract with Customer, Asset, Net	1,214	1,460
Bank Deposit Sweep Income [Member]
Contracts with Customers Assets and Liabilities [Line Items]
Contract with Customer, Asset, Net	4,622	3,459
Investment Banking Fees [Member]
Contracts with Customers Assets and Liabilities [Line Items]
Contract with Customer, Asset, Net	3,996	3,926
Other
Contracts with Customers Assets and Liabilities [Line Items]
Contract with Customer, Asset, Net	2,869	2,398
Investment Banking Fees [Member]
Contracts with Customers Assets and Liabilities [Line Items]
Contract with Customer, Liability	$ 318	$ 0