Condensed Consolidated Statements of Cash Flows (Unaudited) (USD $) In Thousands, unless otherwise specified	3 Months Ended
	Mar. 31, 2012	Mar. 31, 2011
Cash flow from operating activities:
Net income	$ 45,965	$ 4,135
Adjustments to reconcile net income to cash flow from operating activities:
Depreciation and amortization	19,711	19,246
Share-based compensation	3,797	3,435
Excess tax benefits from share-based compensation	(1,269)	(1,484)
Equity in earnings of an investee	(247)	(425)
Cash flow from changes in certain assets and liabilities:
Trade receivables	(26,535)	(8,072)
Inventories	(45,268)	(21,955)
Prepaid expenses	(3,045)	158
Other current assets	(24,992)	(15,419)
Accounts payable	7,063	(29,404)
Deferred revenue	42,378	25,078
Certain other assets and liabilities	(43,579)	(65,444)
Net cash used in operating activities	(26,021)	(90,151)
Cash flow from investing activities:
Proceeds from maturities of investments	88,698	59,292
Proceeds from sale of investments	5,808	7,117
Payments for purchases of investments	(99,738)	(56,720)
Proceeds from sale of assets	0	175
Capital expenditures	(12,297)	(10,902)
Collections on purchased finance receivables	4,438	7,338
Increase in certain other assets	(6,692)	(4,103)
Net cash (used in) provided by investing activities	(19,783)	2,197
Cash flow from financing activities:
Dividends paid	(18,094)	(18,650)
Debt borrowings	263,724	156,637
Debt repayments	(234,264)	(85,210)
Issuance of common shares	9,902	4,017
Repurchase of common shares	(2,885)	(21,451)
Other	157	615
Net cash provided by financing activities	18,540	35,958
Effect of exchange rate changes on cash and cash equivalents	4,781	2,900
Decrease in cash and cash equivalents	(22,483)	(49,096)
Cash and cash equivalents at the beginning of the period	333,920	328,658
Cash and cash equivalents at the end of the period	$ 311,437	$ 279,562