XML 54 R43.htm IDEA: XBRL DOCUMENT v3.10.0.1
Business Developments, Acquisition and Transition Costs, Special Charges and Intangible Asset Amortization (Details) - USD ($)
$ in Thousands
3 Months Ended 9 Months Ended
Sep. 30, 2018
Sep. 30, 2017
Sep. 30, 2018
Sep. 30, 2017
Business Acquisition [Line Items]        
Asset Acquisition, Contingent Consideration, Liability $ 4,463   $ 4,463  
Asset Acquisition, Contingent Consideration Arrangements, Change in Amount of Contingent Consideration, Liability 2,938   3,971  
Acquisition and Transition Costs 0 $ 599 21 $ 976
Special Charges 1,967 0 3,864 21,507
Investment Banking [Member]        
Business Acquisition [Line Items]        
Acquisition and Transition Costs 0 107 0 107
Special Charges 1,967 0 3,864 14,400
Amortization of Intangible Assets 2,191 2,357 6,571 7,071
Investment Management [Member]        
Business Acquisition [Line Items]        
Acquisition and Transition Costs 0 492 21 869
Special Charges 0 0 0 7,107
Amortization of Intangible Assets $ 110 $ 118 328 354
Special Charges [Member] | G5 [Member] | Investment Banking [Member]        
Business Acquisition [Line Items]        
Equity Method Investment, Other than Temporary Impairment       14,400
Institutional Asset Management [Member] | Special Charges [Member] | Investment Management [Member]        
Business Acquisition [Line Items]        
Goodwill, Impairment Loss       $ 7,107
PCA [Member]        
Business Acquisition [Line Items]        
Issuance of Noncontrolling Interest     $ 770