Consolidated Statements Of Cash Flows - USD ($) $ in Thousands	3 Months Ended
	Jun. 30, 2018	Jun. 30, 2017
CASH FLOWS FROM OPERATING ACTIVITIES:
Net income	$ 11,060	$ 3,321
Adjustments to reconcile net income to net cash used by operating activities:
Depreciation	8,645	8,818
Net provision for losses (recoveries) on advances and guaranteed loans to suppliers	(797)	1,290
Foreign currency remeasurement (gain) loss, net	(943)	(5,917)
Other, net	(6,928)	(1,944)
Changes in operating assets and liabilities, net	(179,366)	(122,647)
Net cash used by operating activities	(168,329)	(117,079)
CASH FLOWS FROM INVESTING ACTIVITIES:
Purchase of property, plant and equipment	(11,018)	(6,356)
Proceeds from sale of property, plant and equipment	589	206
Net cash used by investing activities	(10,429)	(6,150)
CASH FLOWS FROM FINANCING ACTIVITIES:
Issuance (repayment) of short-term debt, net	28,978	(16,058)
Repurchase of common stock	(1,443)	0
Dividends paid on common stock	(13,712)	(13,649)
Other	(2,656)	(2,827)
Net cash provided (used) by financing activities	11,167	(32,534)
Effect of exchange rate changes on cash	(529)	375
Net decrease in cash and cash equivalents	(168,120)	(155,388)
Cash and cash equivalents at beginning of year	234,128	283,993
Cash and cash equivalents at end of period	$ 66,008	$ 128,605