XML 88 R71.htm IDEA: XBRL DOCUMENT v3.8.0.1
Acquisitions - Schedule of Allocation of Assets Acquired and Liabilities Assumed (Detail) - USD ($)
$ in Thousands
Dec. 31, 2017
Dec. 31, 2016
Dec. 31, 2015
Feb. 26, 2015
Business Acquisition [Line Items]        
Goodwill $ 945,582 $ 863,881 $ 811,957  
GFI Group Inc. [Member]        
Business Acquisition [Line Items]        
Cash and cash equivalents       $ 238,800
Receivables from broker-dealers, clearing organizations, customers and related-broker dealers       704,800
Accrued commissions receivable, net       93,600
Fixed assets, net       58,400
Goodwill       450,000
Other assets       194,200
Assets held for sale       208,300
Short-term borrowings       (70,000)
Accrued compensation       (141,000)
Payables to broker-dealers, clearing organizations, customers and related broker-dealers       (648,600)
Accounts payable, accrued and other liabilities       (163,300)
Notes payable and collateralized borrowings       (255,300)
Liabilities held for sale       (175,500)
Pre-existing noncontrolling interest       (2,100)
Total       779,500
GFI Group Inc. [Member] | Trade Names [Member]        
Business Acquisition [Line Items]        
Indefinite-lived intangible assets       92,100
GFI Group Inc. [Member] | Noncompete Agreements [Member]        
Business Acquisition [Line Items]        
Finite-lived intangible assets       15,400
GFI Group Inc. [Member] | Technology [Member]        
Business Acquisition [Line Items]        
Finite-lived intangible assets       39,200
GFI Group Inc. [Member] | Customer Relationships [Member]        
Business Acquisition [Line Items]        
Finite-lived intangible assets       133,800
GFI Group Inc. [Member] | Acquired Intangibles [Member]        
Business Acquisition [Line Items]        
Finite-lived intangible assets       $ 6,700