Segment Information (Tables)

6 Months Ended

Sep. 30, 2016

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, 2016 and 2015:       

	Three Months Ended September 30,						Six Months Ended September 30,
	2016			2015			2016			2014
Sales and other operating revenues:
North America	$	58,823		$	64,830		$	108,760		$	95,130
Other regions	330,600			350,023			541,764			586,005
Total revenue	$	389,423		$	414,853		$	650,524		$	681,135
Operating income:
North America	$	3,659		$	5,547		$	2,681		$	6,418
Other regions	14,787			20,736			10,489			16,960
Total operating income	18,446			26,283			13,170			23,378
Interest expense	31,904			28,782			62,507			56,555
Interest income	2,204			1,274			4,042			2,648
Loss before income taxes and other items	$	(11,254	)	$	(1,225	)	$	(45,295	)	$	(30,529	)

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

Analysis of Segment Assets		September 30, 2016		September 30, 2015		March 31, 2016
Segment assets:
	North America	$	396,413	$	400,884	$	338,833
	Other regions	1,602,311		1,545,236		1,629,365
	Total assets	$	1,998,724	$	1,946,120	$	1,968,198