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Software and Other Intangible Assets - Estimated Amortization Expense for Future Fiscal Years Based on Capitalized Intangible Assets (Detail) - USD ($)
$ in Thousands
Jun. 30, 2018
Dec. 31, 2017
Finite-Lived Intangible Assets [Line Items]    
Net Balance $ 179,572 $ 191,281
Software [Member]    
Finite-Lived Intangible Assets [Line Items]    
Remainder of 2018 25,561  
2019 44,993  
2020 35,162  
2021 22,213  
2022 9,157  
2023 4,778  
Thereafter 2,801  
Net Balance 144,665  
Other Intangible Assets [Member]    
Finite-Lived Intangible Assets [Line Items]    
Remainder of 2018 9,401  
2019 18,400  
2020 17,509  
2021 17,007  
2022 16,853  
2023 16,535  
Thereafter 83,867  
Net Balance $ 179,572