XML 77 R62.htm IDEA: XBRL DOCUMENT v3.20.4
Business Changes and Developments - Intangible Assets Associated with Acquisitions (Details) - USD ($)
$ in Thousands
Dec. 31, 2020
Dec. 31, 2019
Finite-Lived Intangible Assets [Line Items]    
Gross Carrying Amount $ 3,630 $ 9,595
Accumulated Amortization 2,932 7,292
Client Related [Member]    
Finite-Lived Intangible Assets [Line Items]    
Gross Carrying Amount 3,630 3,830
Accumulated Amortization 2,932 2,743
Other Intangible Assets Associated With Acquisition [Member]    
Finite-Lived Intangible Assets [Line Items]    
Gross Carrying Amount   5,765
Accumulated Amortization   4,549
Investment Banking [Member]    
Finite-Lived Intangible Assets [Line Items]    
Gross Carrying Amount 0 5,320
Accumulated Amortization 0 4,159
Investment Banking [Member] | Client Related [Member]    
Finite-Lived Intangible Assets [Line Items]    
Gross Carrying Amount 0 0
Accumulated Amortization 0 0
Investment Banking [Member] | Other Intangible Assets Associated With Acquisition [Member]    
Finite-Lived Intangible Assets [Line Items]    
Gross Carrying Amount   5,320
Accumulated Amortization   4,159
Investment Management [Member]    
Finite-Lived Intangible Assets [Line Items]    
Gross Carrying Amount 3,630 4,275
Accumulated Amortization 2,932 3,133
Investment Management [Member] | Client Related [Member]    
Finite-Lived Intangible Assets [Line Items]    
Gross Carrying Amount 3,630 3,830
Accumulated Amortization $ 2,932 2,743
Investment Management [Member] | Other Intangible Assets Associated With Acquisition [Member]    
Finite-Lived Intangible Assets [Line Items]    
Gross Carrying Amount   445
Accumulated Amortization   $ 390