Consolidated Statements Of Cash Flows (USD $)	12 Months Ended
	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012
Payments of Debt Issuance Costs	$ 6,900,000
Cash Flows from Operating Activities:
Net Income	428,329,000	371,500,000	289,017,000
Adjustments to reconcile net income to net cash provided by operating activities:
Depreciation and amortization	229,779,000	202,228,000	176,483,000
Deferred income tax provision	70,717,000	51,800,000	20,654,000
Net gain on sales of property and equipment	(1,165,000)	450,000	(584,000)
Noncash compensation	20,034,000	19,380,000	16,442,000
Distributions from unconsolidated affiliates greater than earnings	0	878,000	6,988,000
Excluding the effects of acquisitions, increase (decrease) in cash from:
Accounts receivable	(8,482,000)	(101,912,000)	(94,237,000)
Inventory	66,327,000	(110,508,000)	(76,186,000)
Other operating assets	(11,197,000)	(22,380,000)	(20,278,000)
Currency translation effect on working capital	(21,603,000)	(12,114,000)	10,224,000
Accounts payable and accrued liabilites	(43,507,000)	128,297,000	87,453,000
Income taxes payable	(15,639,000)	2,435,000	23,559,000
Other operating liabilities	8,169,000	1,370,000	(1,735,000)
Total adjustments to net income	293,433,000	159,924,000	148,783,000
Net Cash Provided by Operating Activities	721,762,000	531,424,000	437,800,000
Cash Flows from Investing Activities:
Purchases of property and equipment	(386,883,000)	(382,531,000)	(300,598,000)
Business acquisitions, net of cash acquired	(39,788,000)	(11,059,000)	(9,260,000)
Distributions of capital from unconsolidated affiliates	4,772,000	4,279,000	0
Dispositions of property and equipment and equity investment	2,427,000	11,666,000	3,814,000
Net Cash Used in Investing Activities	(419,472,000)	(377,645,000)	(306,044,000)
Cash Flows from Financing Activities:
Net proceeds of 4.65% Senior Notes, including issuance costs	493,125,000	0	0
Net proceeds (payments) of bank credit facilities, including issuance costs	248,429,000	(93,739,000)	(27,045,000)
Excess tax benefits from stock-based compensation	3,932,000	4,279,000	2,475,000
Cash dividends	(109,742,000)	(90,885,000)	(74,515,000)
Purchases of treasury stock	(590,384,000)	0	(19,358,000)
Net Cash Provided by (Used in) Financing Activities	45,360,000	(180,345,000)	(118,443,000)
Effect of Exchange Rate on Cash and Cash Equivalents	(8,366,000)	(2,553,000)	1,094,000
Net Increase (Decrease) in Cash and Cash Equivalents	339,284,000	(29,119,000)	14,407,000
Cash and Cash Equivalents-Beginning of Period	91,430,000	120,549,000	106,142,000
Cash and Cash Equivalents-End of Period	430,714,000	91,430,000	120,549,000
Payments of Financing Costs	$ 1,600,000