Contractual interest rate for funds borrowed, under the debt agreement.

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 210
-SubTopic 10
-Section S99
-Paragraph 1
-Subparagraph (SX 210.5-02.22(a)(1))
-URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682

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The cash inflow from a debt initially having maturity due after one year or beyond the operating cycle, if longer.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 230
-SubTopic 10
-Section 45
-Paragraph 14
-Subparagraph (b)
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-Name Accounting Standards Codification
-Topic 230
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-Section 45
-Paragraph 15
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Debt - Principal Payments Due for Debt (Parenthetical) (Detail) - USD ($) $ in Thousands			9 Months Ended
	Oct. 07, 2017	Sep. 07, 2017	Sep. 30, 2017	Sep. 30, 2016	Dec. 31, 2016
Debt Instrument [Line Items]
Payments of term debt			$ 688,221	$ 515,221
Proceeds from term debt			$ 2,355,280	$ 1,000,000
6.375% Senior Unsecured Notes Due 2022 [Member]
Debt Instrument [Line Items]
Senior unsecured notes, interest rate			6.375%		6.375%
6.375% Senior Unsecured Notes Due 2022 [Member] \| Subsequent Event [Member]
Debt Instrument [Line Items]
Payments of term debt	$ 350,000
Senior unsecured notes, interest rate	6.375%
5.000% Senior Unsecured Notes Due 2027 [Member]
Debt Instrument [Line Items]
Senior unsecured notes, interest rate		5.00%	5.00%		5.00%
Proceeds from term debt		$ 1,400,000