Annual report pursuant to Section 13 and 15(d)

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

v3.6.0.2
Nature of Business and Significant Accounting Policies - Narrative (Details)
 1 Months Ended 12 Months Ended
Feb. 10, 2017
USD ($)
May 31, 2016
Dec. 31, 2016
USD ($)
TradeName
contract
Dec. 31, 2015
USD ($)
Dec. 31, 2014
USD ($)
Property, Plant and Equipment [Line Items]          
Stock split ratio   2      
Amortization of intangible assets     $ 16,067,000 $ 15,576,000 $ 10,048,000
Percentage of contracts with the government     80.00% 77.00% 99.00%
Number of contract types | contract     3    
Deferred compensation plan expense     $ 1,700,000 $ 1,900,000 $ 1,300,000
Impairment of intangible assets     $ 0 0 0
Acquired intangible assets, weighted average useful life     12 years 2 months 12 days    
Deferred tax liabilities     $ 29,872,000 31,524,000  
Debt issuance costs     $ 1,700,000 2,200,000  
Accounting Standards Update 2015-17          
Property, Plant and Equipment [Line Items]          
Noncurrent deferred tax assets       (3,600,000)  
Deferred tax liabilities       3,600,000  
Accounting Standards Update 2015-03 | Long-term Debt          
Property, Plant and Equipment [Line Items]          
Debt issuance costs       285,000  
Noncurrent debt issuance costs       882,000  
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    
Product          
Property, Plant and Equipment [Line Items]          
Amortization of intangible assets       13,900,000 7,700,000
Service          
Property, Plant and Equipment [Line Items]          
Amortization of intangible assets       $ 1,700,000 $ 2,300,000
Heritage Disposal and Storage | Subsequent Event          
Property, Plant and Equipment [Line Items]          
Payments for legal settlements $ 3,300,000