Consolidated Statements of Comprehensive Income (Loss) - USD ($) $ in Thousands	3 Months Ended
Jun. 30, 2016	Jun. 30, 2015
Statement of Comprehensive Income [Abstract]
Net income (loss)	$ (8,998)	$ 7,669
Other comprehensive income (loss):
Cumulative translation adjustments	(258)	977
Changes in market value of investments:
Changes in unrealized gains (losses)	41	(59)
Total net change in market value of investments	41	(59)
Changes in market value of derivatives:
Changes in market value of derivatives, net of (benefits) taxes of ($19), and $4, respectively	(31)	6
Reclassification adjustment for net gains included in net income (loss), net of taxes of $8, $460, respectively	14	863
Total net change in market value of derivatives	(17)	869
Other comprehensive income (loss)	(234)	1,787
Total comprehensive income (loss)	$ (9,232)	$ 9,456

Amount after tax of increase (decrease) in equity from transactions and other events and circumstances from net income and other comprehensive income, attributable to parent entity. Excludes changes in equity resulting from investments by owners and distributions to owners.

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