Segment Information (Tables)

6 Months Ended

Sep. 30, 2015

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 and six months ended September 30, 2015 and 2014:       

	Three Months Ended September 30,					Six Months Ended September 30,
	2015			2014		2015			2014
Sales and other operating revenues:
North America	$	64,830		$	85,988	$	95,130		$	121,377
Other regions	350,023			510,982		586,005			724,737
Total revenue	$	414,853		$	596,970	$	681,135		$	846,114
Operating income:
North America	$	5,507		$	7,193	$	6,378		$	9,227
Other regions	20,140			21,510		16,364			22,221
Total operating income	25,647			28,703		22,742			31,448
Interest expense	28,782			28,495		56,555			55,417
Interest income	1,274			1,574		2,648			2,925
Income (loss) before income taxes and other items	$	(1,861	)	$	1,782	$	(31,165	)	$	(21,044	)

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

Analysis of Segment Assets		September 30, 2015		September 30, 2014		March 31, 2015
Segment assets:
	North America	$	404,930	$	337,510	$	231,131
	Other regions	1,542,760		1,572,420		1,395,515
	Total assets	$	1,947,690	$	1,909,930	$	1,626,646