Face (par) amount of debt instrument at time of issuance.

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 835
-SubTopic 30
-Section 55
-Paragraph 8
-URI http://asc.fasb.org/extlink&oid=64930739&loc=d3e28878-108400

Reference 2: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 835
-SubTopic 30
-Section 45
-Paragraph 2
-URI http://asc.fasb.org/extlink&oid=64930785&loc=d3e28551-108399

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- Definition

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

+ References

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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Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

+ References

No definition available.

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- Definition

Face (par) amount of the original debt instrument that was repurchased.

+ References

No definition available.

+ Details

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Balance Type:	debit
Period Type:	instant

- Definition

Difference between the fair value of payments made and the carrying amount of debt which is extinguished prior to maturity.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 470
-SubTopic 50
-Section 40
-Paragraph 2
-URI http://asc.fasb.org/extlink&oid=49170532&loc=d3e12317-112629

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-Section 45
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-Publisher FASB
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- Definition

The cash inflow from a borrowing with the highest claim on the assets of the entity in case of bankruptcy or liquidation (with maturities initially 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
-Glossary Financing Activities
-URI http://asc.fasb.org/extlink&oid=6513228

Reference 2: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 230
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- Definition

The cash outflow during the period from the repayment of aggregate short-term and long-term debt. Excludes payment of capital lease obligations.

+ References

No definition available.

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Indebtedness - Issuances and Principal Repayment (Details) - USD ($) $ in Thousands				3 Months Ended	9 Months Ended
	Sep. 26, 2016	Mar. 11, 2016	Feb. 03, 2016	Sep. 30, 2016	Sep. 30, 2016	Dec. 31, 2015
Indebtedness
Proceeds from issuance of senior notes, net of underwriting discounts and other offering expenses					$ 737,612
Senior Unsecured Notes, due 2021 at 4.25% (4)
Indebtedness
Interest rate, stated percentage				4.25%	4.25%	4.25%
Senior Unsecured Notes, due 2026 at 5.25% (4)
Indebtedness
Interest rate, stated percentage				5.25%	5.25%	5.25%
Senior Unsecured Notes, due 2016 at 6.30% (2)
Indebtedness
Interest rate, stated percentage		6.30%		6.30%	6.30%	6.30%
Principal balance of debt repaid		$ 275,000
Aggregate debt amount		$ 279,139
Loss on early extinguishment of debt					$ 70
Senior Notes, due 2017 at 5.625%
Indebtedness
Interest rate, stated percentage	5.625%
Principal balance of debt repaid	$ 300,000
Aggregate debt amount	$ 300,516
Loss on early extinguishment of debt				$ 158	$ 158
Senior unsecured notes
Indebtedness
Issuance of senior notes			$ 750,000
Proceeds from issuance of senior notes, net of underwriting discounts and other offering expenses			731,506
Senior unsecured notes \| Senior Unsecured Notes, due 2021 at 4.25% (4)
Indebtedness
Issuance of senior notes			$ 400,000
Interest rate, stated percentage			4.25%
Senior unsecured notes \| Senior Unsecured Notes, due 2026 at 5.25% (4)
Indebtedness
Issuance of senior notes			$ 350,000
Interest rate, stated percentage			5.25%