Segment Information (Tables)

3 Months Ended

Jun. 30, 2012

Segment Reporting [Abstract]

Schedule of Revenue from External Customers Attributed to Foreign Countries by Geographic Area

The following table presents the summary segment information for the three months ended June 30, 2012 and 2011:       

	Three Months Ended
	June 30,
	2012			2011
Sales and other operating revenues:
South America	$	178,345		$	155,845
Value added services	33,632			36,111
Other regions	145,793			169,608
Total revenue	$	357,770		$	361,564
Operating income:
South America	$	869		$	14,322
Value added services	1,648			4,385
Other regions	2,762			5,047
Total operating income	5,279			23,754
Interest expense	27,115			25,776
Interest income	998			1,491
Income (loss) before income taxes and other items	$	(20,838	)	$	(531	)

Schedule of Disclosure on Geographic Areas, Long-Lived Assets in Individual Foreign Countries by Country

Analysis of Segment Assets		June 30, 2012		June 30, 2011		March 31, 2012
Segment assets:
	South America	$	766,979	$	740,715	$	534,169
	Value added services	151,266		135,969		117,288
	Other regions	1,187,849		1,080,020		1,298,388
	Total assets	$	2,106,094	$	1,956,704	$	1,949,845