Condensed Consolidated Statements of Cash Flows (Unaudited) (USD $) In Thousands, unless otherwise specified	6 Months Ended
	Jun. 30, 2014	Jun. 30, 2013
Cash flows from operating activities:
Cash received from customers	$ 1,087,487	$ 1,006,345
Cash paid to suppliers and employees	(918,152)	(911,227)
Interest paid	(10,912)	(24,681)
Income tax payments	(17,059)	(42,102)
Investment proceeds and miscellaneous receipts, net	10,283	10,926
Excess tax benefits from share-based compensation	(468)	(499)
(Payments for) proceeds from forward foreign exchange contracts, net	(1,355)	4,992
Net cash provided by operating activities	149,824	43,754
Cash flows from investing activities:
Capital expenditures	(60,892)	(58,598)
Proceeds from dispositions of property, plant and equipment	338	1,088
Payments for acquisitions, net of cash received, and long-term investments	(42,010)	(65,883)
Payments for purchases of intangible assets	(15,382)	(500)
Payments for purchases of marketable securities and investments	(99,073)	(276,835)
Proceeds from sales of marketable securities and investments	44,875	98,588
Proceeds from maturities of marketable securities and investments	70,206	167,574
Net cash used in investing activities	(101,938)	(134,566)
Cash flows from financing activities:
Net payments on line-of-credit arrangements and notes payable	(62)	(18)
Payments on long-term borrowings	(118)	(123)
Payments of contingent consideration	0	(13,074)
Proceeds from issuance of common stock	6,473	6,580
Payments of debt issuance costs for credit agreement	(463)	0
Excess tax benefits from share-based compensation	468	499
Net cash provided by (used in) financing activities	6,298	(6,136)
Effect of foreign exchange rate changes on cash	(1,065)	559
Net increase (decrease) in cash and cash equivalents	53,119	(96,389)
Cash and cash equivalents at beginning of period	331,551	463,388
Cash and cash equivalents at end of period	384,670	366,999
Reconciliation of net income including noncontrolling interests to net cash provided by operating activities:
Net income including noncontrolling interests	38,299	54,774
Adjustments to reconcile net income including noncontrolling interests to net cash provided by operating activities excluding the effects of acquisitions:
Depreciation and amortization	73,007	68,211
Share-based compensation	7,382	6,781
Losses (gains) on dispositions of securities	316	(103)
Excess tax benefits from share-based compensation	(468)	(499)
Changes in fair value of contingent consideration	(5,339)	(1,301)
Decrease (increase) in accounts receivable	46,070	(6,477)
Increase in inventories	(17,209)	(37,093)
Increase in other current assets	(3,360)	(9,056)
Decrease in accounts payable and other current liabilities	(1,004)	(11,261)
Increase (decrease) in income taxes payable	13,548	(26,681)
Net decrease/increase in other long-term assets/liabilities	(1,418)	6,459
Net cash provided by operating activities	$ 149,824	$ 43,754