Financial Instruments - Additional Information (Detail) - USD ($) $ in Thousands	3 Months Ended	6 Months Ended
	Jun. 30, 2019	Jun. 30, 2019	Dec. 31, 2018	Jun. 30, 2018
Derivative [Line Items]
Debt, Long-term and Short-term, Combined Amount	$ 2,722,866	$ 2,722,866	$ 2,317,723	$ 2,977,311
USD Interest Rate Swap Contract One [Member]
Derivative [Line Items]
Notional principal amount of outstanding of the interest rate swap agreement	$ 50,000	$ 50,000
Fixed interest rate	2.878%	2.878%
USD Interest Rate Swap Contract Two [Member]
Derivative [Line Items]
Notional principal amount of outstanding of the interest rate swap agreement	$ 50,000	$ 50,000
Fixed interest rate	2.878%	2.878%
Carrying (Reported) Amount, Fair Value Disclosure [Member]
Derivative [Line Items]
Cash and cash equivalents	$ 111,341	$ 111,341
Carrying (Reported) Amount, Fair Value Disclosure [Member] | Derivative Financial Instruments, Liabilities [Member]
Derivative [Line Items]
Cash Flow Hedge Derivative Instrument Liabilities at Fair Value	4,571	4,571
Estimate of Fair Value, Fair Value Disclosure [Member]
Derivative [Line Items]
Cash and cash equivalents	111,341	111,341
Estimate of Fair Value, Fair Value Disclosure [Member] | Derivative Financial Instruments, Liabilities [Member]
Derivative [Line Items]
Cash Flow Hedge Derivative Instrument Liabilities at Fair Value	4,571	4,571
Bank debt [Member] | Carrying (Reported) Amount, Fair Value Disclosure [Member]
Derivative [Line Items]
Long-Term Debt	1,361,402	1,361,402
Bank debt [Member] | Estimate of Fair Value, Fair Value Disclosure [Member]
Derivative [Line Items]
Long-Term Debt	1,361,402	1,361,402
4 3/4% Senior Notes due 2025 [Member] | Carrying (Reported) Amount, Fair Value Disclosure [Member]
Derivative [Line Items]
Long-Term Debt	300,000	300,000
4 3/4% Senior Notes due 2025 [Member] | Estimate of Fair Value, Fair Value Disclosure [Member]
Derivative [Line Items]
Long-Term Debt	303,672	303,672
3 1/4% Senior Notes due 2025 [Member] | Carrying (Reported) Amount, Fair Value Disclosure [Member]
Derivative [Line Items]
Long-Term Debt	739,245	739,245
3 1/4% Senior Notes due 2025 [Member] | Estimate of Fair Value, Fair Value Disclosure [Member]
Derivative [Line Items]
Long-Term Debt	766,841	766,841
5 1/2% Senior Notes due 2022 [Member] | Carrying (Reported) Amount, Fair Value Disclosure [Member]
Derivative [Line Items]
Long-Term Debt	300,000	300,000
5 1/2% Senior Notes due 2022 [Member] | Estimate of Fair Value, Fair Value Disclosure [Member]
Derivative [Line Items]
Long-Term Debt	$ 301,404	$ 301,404
5 1/2% Senior Notes due 2022 [Member]
Derivative [Line Items]
Senior note interest rate (percent)	5.50%	5.50%	5.50%	5.50%
Debt, Long-term and Short-term, Combined Amount	$ 300,000	$ 300,000	$ 300,000	$ 300,000
3 1/4% Senior Notes due 2025 [Member]
Derivative [Line Items]
Senior note interest rate (percent)	3.25%	3.25%	3.25%	3.25%
Debt, Long-term and Short-term, Combined Amount	$ 739,245	$ 739,245	$ 744,380	$ 759,460
4 3/4% Senior Notes due 2025 [Member]
Derivative [Line Items]
Senior note interest rate (percent)	4.75%	4.75%	4.75%	4.75%
Debt, Long-term and Short-term, Combined Amount	$ 300,000	$ 300,000	$ 300,000	$ 300,000
Accumulated Translation Adjustment [Member]
Derivative [Line Items]
Foreign currency (losses) gains of net investment hedges included in accumulated other comprehensive loss	$ (4,700)	$ 2,400