Consolidated Statements Of Cash Flows (USD $) In Thousands, unless otherwise specified	3 Months Ended
	Jun. 30, 2013	Jun. 30, 2012
CASH FLOWS FROM OPERATING ACTIVITIES:
Net income	$ 53,913	$ 25,233
Adjustments to reconcile net income to net cash used by operating activities:
Depreciation	10,587	10,803
Amortization	415	434
Provisions for losses on advances and guaranteed loans to suppliers	2,946	1,459
Foreign currency remeasurement loss (gain), net	2,534	(8,790)
Equity in net loss (income) of unconsolidated affiliates, net of dividends	(1,014)	(1,237)
Gain on favorable outcome of excise tax case in Brazil	(81,619)	0
Other, net	(11,717)	(2,258)
Changes in operating assets and liabilities, net	(209,035)	(83,580)
Net cash used by operating activities	(232,990)	(57,936)
CASH FLOWS FROM INVESTING ACTIVITIES:
Purchase of property, plant and equipment	(10,368)	(8,726)
Proceeds from sale of property, plant and equipment	145	1,965
Net cash used by investing activities	(10,223)	(6,761)
CASH FLOWS FROM FINANCING ACTIVITIES:
Issuance (repayment) of short-term debt, net	31,739	26,958
Repayment of long-term obligations	(2,500)	(1,250)
Issuance of common stock	457	0
Repurchase of common stock	(14,145)	0
Dividends paid on convertible perpetual preferred stock	(3,712)	(3,712)
Dividends paid on common stock	(11,676)	(11,396)
Net cash provided by financing activities	163	10,600
Effect of exchange rate changes on cash	(345)	(209)
Net decrease in cash and cash equivalents	(243,395)	(54,306)
Cash and cash equivalents at beginning of year	367,864	261,699
Cash and cash equivalents at end of period	$ 124,469	$ 207,393