Condensed Consolidating Financial Information - Cash Flows (Details) - USD ($) $ in Thousands		9 Months Ended		12 Months Ended
	Oct. 03, 2017	Sep. 30, 2017	Sep. 30, 2016	Dec. 31, 2016
Condensed Consolidating Statements Of Cash Flows
Net cash provided by (used for) operating activities		$ (36,109)	$ 404,768
Cash flows from investing activities:
Purchases of investments		(6,722)	(24)
Sales and maturities of investments		12,533	643
Proceeds from sales of assets and insurance claims		32,805	26,597
Cash paid for acquisition of businesses, net		(50,764)
Capital expenditures		(448,864)	(284,950)
Other		(427)	(19)
Net cash (used for) provided by investing activities		(461,439)	(257,753)
Cash flows from financing activities:
Increase (decrease) in cash overdrafts		(78)	5
Proceeds from issuance of long-term debt		411,200
Debt issuance costs		(11,039)
Proceeds from revolving credit facilities		410,000	560,000
Proceeds from (payments for) issuance of common shares		8,300	562
Purchase of capped call hedge transactions		(40,250)
Reduction of long-term debt		(382,815)	(492,625)
Dividends to shareholders	$ (17,200)	(51,346)	(33,927)
Proceeds from (payments for) commercial paper, net		78,000	15,000
Payments on term loan		(162,500)
Proceeds from (payments for) short-term borrowings		(528)	(6,388)
Cash proceeds from equity component of exchangeable debt		159,952
Noncontrolling interest contribution		20,000
Distributions to noncontrolling interest		7,272
Other changes		(7,864)	(4,313)
Reduction in revolving credit facilities			(260,000)
Repurchase of common shares			(1,687)
Net cash (used for) provided by financing activities		423,760	(223,373)
Effect of exchange rate changes on cash and cash equivalents		251	(1,129)
Net increase (decrease) in cash and cash equivalents		(73,537)	(77,487)	$ (73,537)
Cash and cash equivalents, beginning of period		264,093	254,530	254,530
Cash and cash equivalents, end of period		190,556	177,043	264,093
Reportable Legal Entities | Parent Company
Condensed Consolidating Statements Of Cash Flows
Net cash provided by (used for) operating activities		103,187	18,320
Cash flows from investing activities:
Cash paid for investments in consolidated affiliates		100
Net cash (used for) provided by investing activities		(100)
Cash flows from financing activities:
Proceeds from (payments for) issuance of common shares		8,300	562
Dividends to shareholders		(60,285)	(39,887)
Proceeds from issuance of intercompany debt		35,000	25,500
Paydown of intercompany debt		(79,000)
Other changes		(7,864)	(4,313)
Net cash (used for) provided by financing activities		(103,849)	(18,138)
Net increase (decrease) in cash and cash equivalents			182	(762)
Cash and cash equivalents, beginning of period		1,148	873	873
Cash and cash equivalents, end of period		386	1,055	1,148
Reportable Legal Entities | Guarantor Subsidiaries
Condensed Consolidating Statements Of Cash Flows
Net cash provided by (used for) operating activities		(199,071)	(276,655)
Cash flows from investing activities:
Cash paid for investments in consolidated affiliates			86,459
Change in intercompany balances		(424,133)	239,112
Net cash (used for) provided by investing activities		(424,133)	152,653
Cash flows from financing activities:
Proceeds from issuance of long-term debt		411,200
Debt issuance costs		(11,039)
Proceeds from revolving credit facilities		410,000	560,000
Proceeds from parent contributions		37,980	159,000
Purchase of capped call hedge transactions		(40,250)
Reduction of long-term debt		(270,269)	(350,000)
Proceeds from (payments for) commercial paper, net		78,000	15,000
Payments on term loan		(162,500)
Cash proceeds from equity component of exchangeable debt		159,952
Proceeds from issuance of intercompany debt		20,000
Paydown of intercompany debt		(20,000)
Reduction in revolving credit facilities			(260,000)
Net cash (used for) provided by financing activities		613,074	124,000
Net increase (decrease) in cash and cash equivalents			(2)	(10,130)
Cash and cash equivalents, beginning of period		10,177	10	10
Cash and cash equivalents, end of period		47	8	10,177
Reportable Legal Entities | Other Subsidiaries (Non-Guarantors)
Condensed Consolidating Statements Of Cash Flows
Net cash provided by (used for) operating activities		148,714	669,063
Cash flows from investing activities:
Purchases of investments		(6,722)	(24)
Sales and maturities of investments		12,533	643
Proceeds from sales of assets and insurance claims		32,805	26,597
Cash paid for acquisition of businesses, net		(50,764)
Cash paid for investments in consolidated affiliates		75,960	159,000
Capital expenditures		(448,864)	(284,950)
Change in intercompany balances		424,133	(239,112)
Other		(427)	(19)
Net cash (used for) provided by investing activities		(113,266)	(655,865)
Cash flows from financing activities:
Increase (decrease) in cash overdrafts		(78)	5
Proceeds from parent contributions		38,080	86,459
Reduction of long-term debt		(112,546)	(142,625)
Proceeds from (payments for) short-term borrowings		(528)	(6,388)
Proceeds from issuance of intercompany debt		(55,000)	(25,500)
Noncontrolling interest contribution		20,000
Paydown of intercompany debt		99,000
Distributions to noncontrolling interest		7,272
Distribution from subsidiary to parent		(80,000)
Repurchase of common shares			(1,687)
Net cash (used for) provided by financing activities		(98,344)	(89,736)
Effect of exchange rate changes on cash and cash equivalents		251	(1,129)
Net increase (decrease) in cash and cash equivalents			(77,667)	(62,645)
Cash and cash equivalents, beginning of period		252,768	253,647	253,647
Cash and cash equivalents, end of period		190,123	175,980	$ 252,768
Consolidating Adjustments
Condensed Consolidating Statements Of Cash Flows
Net cash provided by (used for) operating activities		(88,939)	(5,960)
Cash flows from investing activities:
Cash paid for investments in consolidated affiliates		(76,060)	(245,459)
Net cash (used for) provided by investing activities		76,060	245,459
Cash flows from financing activities:
Proceeds from parent contributions		(76,060)	(245,459)
Dividends to shareholders		8,939	5,960
Distribution from subsidiary to parent		80,000
Net cash (used for) provided by financing activities		$ 12,879	$ (239,499)