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Changes in Accumulated Other Comprehensive Income (Loss) by Component, Net of Tax (Detail) - USD ($) $ in Thousands	12 Months Ended
	Mar. 31, 2017	Mar. 31, 2016
Accumulated Other Comprehensive Income (Loss) [Line Items]
Balance	$ 2,305,554	$ 2,480,715
Balance	1,651,059	2,305,554
Available for Sale Securities
Accumulated Other Comprehensive Income (Loss) [Line Items]
Balance	(208)	235
Gains/(losses) recognized in OCI	(265)	(573)
Reclasses from OCI to net income	378	130
Net period OCI	113	(443)
Balance	(95)	(208)
Currency Translation Adjustment
Accumulated Other Comprehensive Income (Loss) [Line Items]
Balance	(9,811)	(9,811)
Balance	(9,811)	(9,811)
Pension/Post-retirement Benefits
Accumulated Other Comprehensive Income (Loss) [Line Items]
Balance	4,683	(9,129)
Gains/(losses) recognized in OCI	(5,121)	13,812
Net period OCI	(5,121)	13,812
Balance	(438)	4,683
Interest Rate Swaps
Accumulated Other Comprehensive Income (Loss) [Line Items]
Balance	(1,530)	(1,673)
Reclasses from OCI to net income	1,530	143
Net period OCI	1,530	143
Balance		(1,530)
Accumulated other comprehensive loss
Accumulated Other Comprehensive Income (Loss) [Line Items]
Balance	(6,866)	(20,378)
Gains/(losses) recognized in OCI	(5,386)	13,239
Reclasses from OCI to net income	1,908	273
Net period OCI	(3,478)	13,512
Balance	$ (10,344)	$ (6,866)

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Amount after tax, before reclassification adjustments of other comprehensive income (loss).

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Amount of stockholders' equity (deficit), net of receivables from officers, directors, owners, and affiliates of the entity, attributable to both the parent and noncontrolling interests. Amount excludes temporary equity. Alternate caption for the concept is permanent equity.

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