Consolidated Statements Of Cash Flows Information (Details) (USD $) In Thousands, unless otherwise specified	12 Months Ended
Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012
Supplemental Cash Flow Information [Abstract]
Interest	$ 109,451us-gaap_InterestPaid	$ 86,173us-gaap_InterestPaid	$ 80,985us-gaap_InterestPaid
Income taxes	148,991us-gaap_ProceedsFromIncomeTaxRefunds	137,650us-gaap_ProceedsFromIncomeTaxRefunds	43,650us-gaap_ProceedsFromIncomeTaxRefunds
Fair value of assets acquired in acquisition	7,267us-gaap_FairValueOfAssetsAcquired	1,714,462us-gaap_FairValueOfAssetsAcquired	0us-gaap_FairValueOfAssetsAcquired
Noncontrolling interest of assets acquired	0	(14,577)	0
Liabilities assumed in acquisition	(7,286)us-gaap_LiabilitiesAssumed1	(942,513)us-gaap_LiabilitiesAssumed1	0us-gaap_LiabilitiesAssumed1
Shares issued for acquisitions	0	(313,906)	0
Noncash investing and financing activities, total	$ (19)	$ 443,466	$ 0

Noncash investing and financing activities.

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Noncash or Part Noncash Acquisitions, Shares Issued, Value

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The fair value of assets acquired in noncash investing or financing activities.

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The amount of cash paid for interest during the period.

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The amount of cash received during the period as refunds for the overpayment of taxes.

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