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Long-Term Debt - Summary of Long Term Debt (Detail) - USD ($) $ in Thousands	Mar. 31, 2020	Dec. 31, 2019
Debt Instrument [Line Items]
Total	$ 1,365,206	$ 1,373,305
Current portion of long-term debt	33,517	33,509
Long-term debt, less current portion	1,331,689	1,339,796
Credit facility, Net of Amortization Expenses
Debt Instrument [Line Items]
Total	618,984	627,359
Senior Notes 3.70%, Net of Debt Amortization Expense
Debt Instrument [Line Items]
Total	348,945	348,814
Senior Notes 3.375%, Net of Debt Amortization Expense
Debt Instrument [Line Items]
Total	$ 397,277	$ 397,132

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Amount, after unamortized (discount) premium and debt issuance costs, of long-term debt. Includes, but not limited to, notes payable, bonds payable, debentures, mortgage loans and commercial paper. Excludes capital lease obligations.

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 470
-SubTopic 20
-Section 50
-Paragraph 4
-Subparagraph (b)(3)
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-Section S99
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