Consolidated Statement Of Cash Flows (USD $) In Thousands, unless otherwise specified	3 Months Ended
Mar. 31, 2012	Mar. 31, 2011
Cash flows from operating activities:
Net income	$ 81,056	$ 84,043
Adjustments to reconcile to net cash provided by (used in) operating activities:
Depreciation and amortization	19,039	17,962
Deferred income taxes	(16,313)	17,915
Gain on disposal of assets	(806)	(807)
Stock-based compensation	2,990	4,817
Changes in assets and liabilities:
Trade receivables	(41,220)	(55,564)
Inventories	(801)	(11,933)
Accounts payable	(22,286)	(19,272)
Accruals for incentive compensation	(6,756)	(55,597)
Other current payables and accrued expenses	23,420	(18,234)
Other assets	8,854	9,122
Other liabilities	5,459	(7,396)
Net cash provided by (used in) operating activities	52,636	(34,944)
Cash flows from investing activities:
Additions to property, plant and equipment	(28,758)	(19,375)
Purchase of insurance contracts	(636)	(217)
Maturity of net investment hedges	1,960
Proceeds from disposal of assets	68	144
Net cash used in investing activities	(27,366)	(19,448)
Cash flows from financing activities:
Cash dividends paid to shareholders	(25,086)	(21,657)
Net change in revolving credit facility borrowings and overdrafts	(16,194)	51,572
Proceeds from issuance of stock under stock-based compensation plans	1,104	3,479
Excess tax benefits on stock-based payments	1,312	816
Net cash (used in) provided by financing activities	(38,864)	34,210
Effect of exchange rate changes on cash and cash equivalents	1,841	820
Net change in cash and cash equivalents	(11,753)	(19,362)
Cash and cash equivalents at beginning of year	88,279	131,332
Cash and cash equivalents at end of period	76,526	111,970
Interest paid	23,650	26,344
Income taxes paid	$ 7,361	$ 20,337

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Includes currency on hand as well as demand deposits with banks or financial institutions. It also includes other kinds of accounts that have the general characteristics of demand deposits in that the Entity may deposit additional funds at any time and also effectively may withdraw funds at any time without prior notice or penalty. Cash equivalents, excluding items classified as marketable securities, include short-term, highly liquid investments that are both readily convertible to known amounts of cash, and so near their maturity that they present minimal risk of changes in value because of changes in interest rates. Generally, only investments with original maturities of three months or less qualify under that definition. Original maturity means original maturity to the entity holding the investment. For example, both a three-month US Treasury bill and a three-year Treasury note purchased three months from maturity qualify as cash equivalents. However, a Treasury note purchased three years ago does not become a cash equivalent when its remaining maturity is three months. Compensating balance arrangements that do not legally restrict the withdrawal or usage of cash amounts may be reported as Cash and Cash Equivalents, while legally restricted deposits held as compensating balances against borrowing arrangements, contracts entered into with others, or company statements of intention with regard to particular deposits are not generally reported as cash and cash equivalents. Includes cash and cash equivalents associated with the entity's continuing operations. Excludes cash and cash equivalents associated with the disposal group (and discontinued operation).