Statement of Cash Flows (Unaudited) (USD $) In Thousands	6 Months Ended
	Jun. 30, 2011	Jun. 30, 2010
Cash flows from operating activities:
Net earnings	$ 149,843	$ 106,318
Adjustments to reconcile net earnings to net cash provided by operating activities:
Amortization of convertible debt discount	11,279	10,443
Depreciation and other amortization	71,685	80,511
Provision for bad debt	5,364	4,139
Write-off of deferred debt issuance costs	3,218	1,928
Share-based compensation expense	15,879	15,434
Deferred income tax benefit	(21,061)	(29,647)
Excess tax benefit from share-based payment arrangements	(2,082)	(1,392)
Change in assets and liabilities:
Decrease in accounts receivable, net	3,586	30,932
Decrease (increase) in inventories, net	4,504	(36,102)
Increase in prepaid expenses and other	(13,540)	(4,193)
Decrease in accounts payable	(8,585)	(632)
Increase (decrease) in accrued expenses and other	17,824	(20,687)
Increase (decrease) in tax liabilities, net	2,088	(18,692)
Decrease in deferred income taxes, net	(3,541)	(460)
Net cash provided by operating activities	236,461	137,900
Cash flows from investing activities:
Additions to property, plant and equipment	(66,750)	(46,192)
Decrease (increase) in inventory to be converted into equipment for short-term rental	(7,239)	7,265
Dispositions of property, plant and equipment	913	1,067
Increase in identifiable intangible assets and other non-current assets	(17,364)	(2,091)
Net cash used by investing activities	(90,440)	(39,951)
Cash flows from financing activities:
Repayments of long-term debt, revolving credit facility and capital lease obligations	(13,830)	(125,054)
Proceeds from exercise of stock options	36,004	10,185
Proceeds from the purchase of stock in ESPP and other	4,107	3,451
Excess tax benefit from share-based payment arrangements	2,082	1,392
Purchase of immature shares for minimum tax withholdings	(3,681)	(1,108)
Refinancing of senior credit facility:
Proceeds from borrowings on refinancing of senior credit facility	146,012	0
Repayments on senior credit facility - due 2013	(123,346)	0
Payment of debt issuance costs	(14,676)	0
Net cash provided (used) by financing activities	32,672	(111,134)
Effect of exchange rate changes on cash and cash equivalents	3,128	(2,904)
Net increase (decrease) in cash and cash equivalents	181,821	(16,089)
Cash and cash equivalents, beginning of period	316,603	263,157
Cash and cash equivalents, end of period	498,424	247,068
Cash paid for:
Interest, including cash paid under interest rate swap agreements	19,613	28,215
Income taxes, net of refunds	$ 84,913	$ 94,306