Quarterly report pursuant to Section 13 or 15(d)

Acquisitions - Allocated Purchase Price (Details)

v3.8.0.1
Acquisitions - Allocated Purchase Price (Details) - USD ($)
$ in Thousands
1 Months Ended
Oct. 31, 2017
Sep. 30, 2017
Feb. 28, 2017
Mar. 31, 2018
Dec. 31, 2017
Jun. 30, 2017
Jan. 31, 2017
Business Acquisition [Line Items]              
Goodwill       $ 751,017 $ 751,052    
Axiometrics              
Business Acquisition [Line Items]              
Restricted cash       0      
Accounts receivable       1,620      
Property, equipment, and software       400      
Goodwill       54,190     $ 54,200
Other assets       273      
Accounts payable and accrued liabilities       (367)      
Client deposits held in restricted accounts       0      
Deferred revenue       (7,115)      
Other long-term liabilities       (774)      
Deferred tax liabilities, net       0      
Total purchase price       73,757      
Axiometrics | Developed product technologies              
Business Acquisition [Line Items]              
Intangible assets:       15,500      
Axiometrics | Client relationships              
Business Acquisition [Line Items]              
Intangible assets:       6,830      
Axiometrics | Trade names              
Business Acquisition [Line Items]              
Intangible assets:       3,200      
Axiometrics | Non-compete agreements              
Business Acquisition [Line Items]              
Intangible assets:       0      
AUM              
Business Acquisition [Line Items]              
Restricted cash       5,954      
Accounts receivable       2,409      
Property, equipment, and software       319      
Goodwill       45,907   $ 45,900  
Other assets       850      
Accounts payable and accrued liabilities       (2,150)      
Client deposits held in restricted accounts       (5,954)      
Deferred revenue       (321)      
Other long-term liabilities       0      
Deferred tax liabilities, net       0      
Total purchase price       69,412      
AUM | Developed product technologies              
Business Acquisition [Line Items]              
Intangible assets:       10,800      
AUM | Client relationships              
Business Acquisition [Line Items]              
Intangible assets:       7,470      
AUM | Trade names              
Business Acquisition [Line Items]              
Intangible assets:       208      
AUM | Non-compete agreements              
Business Acquisition [Line Items]              
Intangible assets:       3,920      
On-Site              
Business Acquisition [Line Items]              
Restricted cash       3,458      
Accounts receivable       4,718      
Property, equipment, and software       789      
Goodwill   $ 184,500   184,534      
Other assets       826      
Accounts payable and accrued liabilities       (952)      
Client deposits held in restricted accounts       (3,458)      
Deferred revenue       (565)      
Other long-term liabilities       0      
Deferred tax liabilities, net       (1,240)      
Total purchase price       253,430      
Total purchase price   $ 253,400          
On-Site | Developed product technologies              
Business Acquisition [Line Items]              
Intangible assets:       16,960      
On-Site | Client relationships              
Business Acquisition [Line Items]              
Intangible assets:       41,360      
On-Site | Trade names              
Business Acquisition [Line Items]              
Intangible assets:       7,000      
On-Site | Non-compete agreements              
Business Acquisition [Line Items]              
Intangible assets:       0      
PEX              
Business Acquisition [Line Items]              
Restricted cash       0      
Accounts receivable       174      
Property, equipment, and software       8      
Goodwill $ 3,200     3,242      
Other assets       78      
Accounts payable and accrued liabilities       (242)      
Client deposits held in restricted accounts       0      
Deferred revenue       (221)      
Other long-term liabilities       0      
Deferred tax liabilities, net       (108)      
Total purchase price       6,031      
Total purchase price $ 6,000            
PEX | Developed product technologies              
Business Acquisition [Line Items]              
Intangible assets:       2,350      
PEX | Client relationships              
Business Acquisition [Line Items]              
Intangible assets:       590      
PEX | Trade names              
Business Acquisition [Line Items]              
Intangible assets:       160      
PEX | Non-compete agreements              
Business Acquisition [Line Items]              
Intangible assets:       0      
LRO              
Business Acquisition [Line Items]              
Restricted cash       0      
Accounts receivable       4,498      
Property, equipment, and software       1,507      
Goodwill     $ 203,200 203,171      
Other assets       475      
Accounts payable and accrued liabilities       (533)      
Client deposits held in restricted accounts       0      
Deferred revenue       (861)      
Other long-term liabilities       0      
Deferred tax liabilities, net       0      
Total purchase price       299,923      
Total purchase price     $ 299,900        
LRO | Developed product technologies              
Business Acquisition [Line Items]              
Intangible assets:       42,000      
LRO | Client relationships              
Business Acquisition [Line Items]              
Intangible assets:       49,000      
LRO | Trade names              
Business Acquisition [Line Items]              
Intangible assets:       666      
LRO | Non-compete agreements              
Business Acquisition [Line Items]              
Intangible assets:       $ 0