Annual report pursuant to Section 13 and 15(d)

Nature of Business and Significant Accounting Policies - Narrative (Details)

v3.10.0.1
Nature of Business and Significant Accounting Policies - Narrative (Details)
 12 Months Ended
Jan. 01, 2019
USD ($)
Jan. 01, 2018
USD ($)
Dec. 31, 2018
USD ($)
TradeName
contract
Dec. 31, 2017
USD ($)
Dec. 31, 2016
USD ($)
May 01, 2012
USD ($)
Property, Plant and Equipment [Line Items]            
Percentage of contracts with the government     78.00% 82.00% 80.00%  
Number of contract types | contract     3      
Deferred compensation plan expense     $ 2,100,000 $ 1,900,000 $ 1,700,000  
Impairment of intangible assets     $ 0 $ 0 $ 0  
Acquired intangible assets, weighted average useful life     12 years 2 months 12 days      
Assets derecognized           $ (27,300,000)
ASU 2014-09            
Property, Plant and Equipment [Line Items]            
Cumulative effect on retained earnings   $ 1,500,000        
Servicing Contracts            
Property, Plant and Equipment [Line Items]            
Acquired intangible assets, weighted average useful life     12 years 7 months 6 days      
Servicing Contracts | Minimum            
Property, Plant and Equipment [Line Items]            
Finite-lived intangible assets, useful life     7 years      
Servicing Contracts | Maximum            
Property, Plant and Equipment [Line Items]            
Finite-lived intangible assets, useful life     16 years      
Trade Names            
Property, Plant and Equipment [Line Items]            
Finite-lived intangible assets, useful life     9 years      
Number of trade names | TradeName     4      
Acquired Technologies            
Property, Plant and Equipment [Line Items]            
Finite-lived intangible assets, useful life     11 years      
Other Capitalized Property Plant and Equipment | Minimum            
Property, Plant and Equipment [Line Items]            
Property, plant and equipment, useful life     3 years      
Other Capitalized Property Plant and Equipment | Maximum            
Property, Plant and Equipment [Line Items]            
Property, plant and equipment, useful life     15 years      
Land, Buildings and Improvements | Minimum            
Property, Plant and Equipment [Line Items]            
Property, plant and equipment, useful life     15 years      
Land, Buildings and Improvements | Maximum            
Property, Plant and Equipment [Line Items]            
Property, plant and equipment, useful life     20 years      
Subsequent Event | ASU 2016-02            
Property, Plant and Equipment [Line Items]            
Cumulative effect on retained earnings $ 4,000,000          
Liabilities derecognized 20,300,000          
Assets derecognized 15,200,000          
Finance lease, ROU asset 18,000,000          
Finance lease, liability 24,000,000          
Operating lease, ROU asset 5,500,000          
Operating lease, liability $ 5,600,000