v3.3.0.814
Financing and Other Debt - Additional Information (Detail)
3 Months Ended 9 Months Ended
Apr. 28, 2015
Jun. 30, 2015
USD ($)
Sep. 30, 2015
USD ($)
Dec. 31, 2014
USD ($)
Debt Instrument [Line Items]        
Revolving credit facility     $ 709,219,000 $ 901,564,000
Borrowed federal funds     0 0
Securitization facility     78,303,000 0
Unik [Member]        
Debt Instrument [Line Items]        
Outstanding debt     $ 5,340,000 $ 7,975,000
Weighted average annual interest rate     14.10% 13.90%
2014 Credit Agreement [Member] | Revolving Credit Facility [Member]        
Debt Instrument [Line Items]        
Revolving credit facility     $ 243,594,000  
Revolving credit facility, maximum borrowings     $ 700,000,000  
2014 Credit Agreement [Member] | Revolving Credit Facility [Member] | London Interbank Offered Rate (LIBOR) [Member] | Interest Rate Option One [Member]        
Debt Instrument [Line Items]        
Margin on variable rate     2.00%  
2014 Credit Agreement [Member] | Revolving Credit Facility [Member] | Prime Rate [Member] | Interest Rate Option One [Member]        
Debt Instrument [Line Items]        
Margin on variable rate     1.00%  
2014 Credit Agreement [Member] | Foreign Line of Credit [Member] | Eurocurrency Rate [Member] | Interest Rate Option Two [Member]        
Debt Instrument [Line Items]        
Margin on variable rate     2.00%  
2014 Credit Agreement [Member] | Credit Facility Term Loans [Member]        
Debt Instrument [Line Items]        
Revolving credit facility     $ 465,625,000 $ 486,250,000
Federal Funds Purchased [Member]        
Debt Instrument [Line Items]        
Increase in federal funds lines of credit   $ 135,000,000    
Borrowed federal funds, current borrowing capacity   $ 260,000,000 260,000,000 125,000,000
Loan Participations and Assignments [Member]        
Debt Instrument [Line Items]        
Debt instrument, aggregate principal amount     45,000,000 $ 45,000,000
Loan Participations and Assignments [Member] | Minimum [Member]        
Debt Instrument [Line Items]        
Range of daily balance     0  
Loan Participations and Assignments [Member] | Maximum [Member]        
Debt Instrument [Line Items]        
Range of daily balance     $ 45,000,000  
Loan Participations and Assignments [Member] | London Interbank Offered Rate (LIBOR) [Member]        
Debt Instrument [Line Items]        
Margin on variable rate     2.25%  
Securitization Facility [Member]        
Debt Instrument [Line Items]        
Term of securitization facility 1 year      
Debt Instrument, Securitization Facility, Percentage of Receivables Used as Collateral 0.85      
Interest rate     2.91%