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v3.3.1.900

Short and Long-Term Debt - Long-Term Debt Additional Information (Detail) | Jan. 22, 2016 USD ($) | Jan. 22, 2016 GBP (£) | Jan. 22, 2016 GBP (£) | Dec. 31, 2015 USD ($) | Dec. 11, 2015 USD ($) | Aug. 31, 2015 USD ($)
--- | --- | --- | --- | --- | --- | ---
Debt Instrument [Line Items] |  |  |  |  |  |
Maturity obligation, 2016 |  |  |  | $ 6,700,000 |  |
Maturity obligation, 2017 |  |  |  | 26,700,000 |  |
Maturity obligation, 2018 |  |  |  | 26,700,000 |  |
Maturity obligation, 2019 |  |  |  | 26,700,000 |  |
Maturity obligation, 2020 |  |  |  | 353,100,000 |  |
Maturity obligation, thereafter |  |  |  | 26,700,000 |  |
Amounts drawn on bank guarantees and letters of credit |  |  |  | 0 |  |
Cash collateral |  |  |  | 2,400,000 |  |
Standby Letters of Credit |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |
Line of credit, maximum borrowing capacity |  |  |  | 7,900,000 |  |
Senior Notes | Revolving Credit Facility |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |
Line of credit, maximum borrowing capacity |  |  |  |  |  | $ 125,000,000.0
Senior Revolving Credit Facility Maturing in 2020 | Standby Letters of Credit |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |
Line of credit, maximum borrowing capacity |  |  |  | 3,500,000 |  |
Senior Revolving Credit Facility Maturing in 2020 | Senior Notes | Revolving Credit Facility |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |
Line of credit, maximum borrowing capacity |  |  |  |  | $ 575,000,000.0 |
Unused senior revolving credit facility |  |  |  | $ 244,900,000 |  |
Subsequent Event | Multi-currency Notes Due in 2031 | Notes Payable |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |
Notes payable, principal amount | $ 80,000,000 |  | £ 54,900,000.0 |  |  |
Notes payable, annual repayment installments | $ 8,900,000 | £ 6,100,000.0 |  |  |  |
Notes payable, interest rate | 3.40% |  | 3.40% |  |  |
Minimum fixed charges coverage ratio (not less than) | 1.50 | 1.50 |  |  |  |
Consolidated leverage ratio (not to exceed) | 3.25 | 3.25 |  |  |  |

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