CONDENSED CONSOLIDATED STATEMENTS OF CASH FLOWS (USD $) In Thousands, unless otherwise specified	3 Months Ended
Mar. 31, 2015	Mar. 31, 2014
Cash Flows from Operating Activities:
Net income	$ 45,099us-gaap_ProfitLoss	$ 48,408us-gaap_ProfitLoss
Adjustments to reconcile net income to net cash provided by operations:
Depreciation	32,979us-gaap_Depreciation	35,849us-gaap_Depreciation
Amortization	1,081us-gaap_AdjustmentForAmortization	1,398us-gaap_AdjustmentForAmortization
Stock based compensation	8,803us-gaap_ShareBasedCompensation	8,396us-gaap_ShareBasedCompensation
(Recovery of) Provision for doubtful accounts	(156)us-gaap_ProvisionForDoubtfulAccounts	716us-gaap_ProvisionForDoubtfulAccounts
Deferred income taxes	(1,001)us-gaap_DeferredIncomeTaxExpenseBenefit	(2,048)us-gaap_DeferredIncomeTaxExpenseBenefit
Defined benefit plan expense	5,161	4,226
Equity in results of affiliates in excess of cash distributions received	119	1,546
Changes in balance sheet items, excluding effects from foreign currency adjustments:
Accounts receivable	(44,798)	(67,150)
Inventories	1,040us-gaap_IncreaseDecreaseInInventories	(6,007)us-gaap_IncreaseDecreaseInInventories
Prepaid and other current assets	(12,975)	(5,666)
Accounts payable and accrued liabilities	12,691	6,320
Income taxes payable	(2,879)	(5,097)
Retirement and deferred compensation plans	(4,567)	(3,174)
Other changes, net	(1,522)	14,329
Net Cash Provided by Operations	39,075	32,046
Cash Flows from Investing Activities:
Capital expenditures	(26,885)	(42,914)
Proceeds from sale of property and equipment, including insurance proceeds	1,840	2,378
Notes receivable, net	151
Net Cash Used by Investing Activities	(24,894)	(40,536)
Cash Flows from Financing Activities:
(Repayments of) Proceeds from notes payable	(229,294)	35,609
Proceeds from long-term obligations	225,000
Repayments of long-term obligations	(791)us-gaap_RepaymentsOfLongTermDebt	(293)us-gaap_RepaymentsOfLongTermDebt
Dividends paid	(17,402)us-gaap_PaymentsOfDividendsCommonStock	(16,366)us-gaap_PaymentsOfDividendsCommonStock
Credit facility costs	(399)us-gaap_PaymentsOfDebtIssuanceCosts	(299)us-gaap_PaymentsOfDebtIssuanceCosts
Proceeds from stock option exercises	20,398	7,770
Purchase of treasury stock		(12,999)
Excess tax benefit from exercise of stock options	3,421	1,590
Net Cash Provided by Financing Activities	933	15,012
Effect of Exchange Rate Changes on Cash	(29,183)	794
Net (Decrease) Increase in Cash and Equivalents	(14,069)	7,316
Cash and Equivalents at Beginning of Period	399,762	309,861
Cash and Equivalents at End of Period	$ 385,693	$ 317,177

The aggregate amount of recurring noncash expense charged against earnings in the period to allocate the cost of assets over their estimated remaining economic lives.

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Amount of currency on hand as well as demand deposits with banks or financial institutions. Includes other kinds of accounts that have the general characteristics of demand deposits. Also includes short-term, highly liquid investments that are both readily convertible to known amounts of cash and so near their maturity that they present insignificant risk of changes in value because of changes in interest rates. Excludes cash and cash equivalents within disposal group and discontinued operation.

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Amount of cash inflow from realized tax benefit related to deductible compensation cost reported on the entity's tax return for equity instruments in excess of the compensation cost for those instruments recognized for financial reporting purposes.

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The increase (decrease) in cash associated with the entity's continuing operating, investing, and financing activities. While for technical reasons this element has no balance attribute, the default assumption is a debit balance consistent with its label.

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Amount of cash inflow (outflow) of investing activities, excluding discontinued operations. Investing activity cash flows include making and collecting loans and acquiring and disposing of debt or equity instruments and property, plant, and equipment and other productive assets.

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Amount of cash inflow (outflow) from operating activities, excluding discontinued operations. Operating activity cash flows include transactions, adjustments, and changes in value not defined as investing or financing activities.

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-Publisher FASB

-Name Accounting Standards Codification

-Glossary Financing Activities

-URI http://asc.fasb.org/extlink&oid=6513228

+ Details

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- Definition

The aggregate amount of noncash, equity-based employee remuneration. This may include the value of stock or unit options, amortization of restricted stock or units, and adjustment for officers' compensation. As noncash, this element is an add back when calculating net cash generated by operating activities using the indirect method.

+ References

+ Details

Name:	us-gaap_ShareBasedCompensation
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Data Type:	xbrli:monetaryItemType
Balance Type:	debit
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