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Short and Long-Term Debt - Short-Term Debt Additional Information (Detail) - USD ($) $ in Thousands | 12 Months Ended
--- | ---
Dec. 31, 2020 | Dec. 31, 2019 | Dec. 31, 2018
Line of Credit Facility [Line Items] |  |  |
Restricted Cash and Cash Equivalents | $ 400 | $ 300 |
Gain (Loss) on Extinguishment of Debt | 0 | $ 0 | $ (1,494)
Revolving Credit Facility |  |  |
Line of Credit Facility [Line Items] |  |  |
Line of Credit Facility, Maximum Borrowing Capacity | $ 600,000 |  |
Debt, Weighted Average Interest Rate | 1.15% |  |
Line of Credit Facility, Remaining Borrowing Capacity | $ 385,500 |  |
Federal Funds Effective Swap Rate | Revolving Credit Facility |  |  |
Line of Credit Facility [Line Items] |  |  |
Debt Instrument, Basis Spread on Variable Rate | 0.50% |  |
Daily Libor Rate | Revolving Credit Facility |  |  |
Line of Credit Facility [Line Items] |  |  |
Debt Instrument, Basis Spread on Variable Rate | 1.00% |  |
Minimum | BASE or LIBOR | Revolving Credit Facility |  |  |
Line of Credit Facility [Line Items] |  |  |
Debt Instrument, Basis Spread on Variable Rate | 0.00% |  |
Maximum | BASE or LIBOR | Revolving Credit Facility |  |  |
Line of Credit Facility [Line Items] |  |  |
Debt Instrument, Basis Spread on Variable Rate | 1.75% |  |
Senior Revolving Credit Facility Maturing in 2023 | Overnight Bank Funding Rate |  |  |
Line of Credit Facility [Line Items] |  |  |
Debt Instrument, Basis Spread on Variable Rate | 0.50% |  |
Multi-currency Notes Due in 2031 |  |  |
Line of Credit Facility [Line Items] |  |  |
Debt Instrument, Covenant, Fixed Charges Coverage Ratio, Minimum | 1.50 |  |
Debt Instrument, Covenant, Consolidated Leverage Ratio, Maximum | 3.50 |  |
Debt Instrument, Covenant, Consolidated Leverage Ratio In Period Of Acquisition, Maximum | 4.00 |  |
Notes Payable, Other Payables [Member] | Multi-currency Notes Due in 2031 |  |  |
Line of Credit Facility [Line Items] |  |  |
Additional Senior Notes Available for Request | $ 150,000 |  |
Notes Payable, Other Payables [Member] | Master Note Facility Due in 2022 |  |  |
Line of Credit Facility [Line Items] |  |  |
Additional Senior Notes Available for Request | $ 150,000 |  |

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