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Changes in Accumulated Other Comprehensive Income (Loss) by Component, Net of Tax (Detail) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Sep. 30, 2016	Sep. 30, 2015	Sep. 30, 2016	Sep. 30, 2015
Accumulated Other Comprehensive Income (Loss) [Line Items]
Accumulated other comprehensive income, beginning balance	$ (6,634)	$ (20,181)	$ (6,866)	$ (20,378)
Gains/(losses) recognized in OCI	79	(690)	138	(734)
Reclasses from OCI to net income	112	243	285	484
Net period OCI	191	(447)	423	(250)
Accumulated other comprehensive income, ending balance	(6,443)	(20,628)	(6,443)	(20,628)
Available for Sale Securities
Accumulated Other Comprehensive Income (Loss) [Line Items]
Accumulated other comprehensive income, beginning balance	(47)	183	(208)	235
Gains/(losses) recognized in OCI	79	(690)	138	(804)
Reclasses from OCI to net income	40	63	142	125
Net period OCI	119	(627)	280	(679)
Accumulated other comprehensive income, ending balance	72	(444)	72	(444)
Currency Translation Adjustment
Accumulated Other Comprehensive Income (Loss) [Line Items]
Accumulated other comprehensive income, beginning balance	(9,811)	(9,811)	(9,811)	(9,811)
Accumulated other comprehensive income, ending balance	(9,811)	(9,811)	(9,811)	(9,811)
Pension/Post-retirement Benefits
Accumulated Other Comprehensive Income (Loss) [Line Items]
Accumulated other comprehensive income, beginning balance	4,683	(9,059)	4,683	(9,129)
Gains/(losses) recognized in OCI				70
Net period OCI				70
Accumulated other comprehensive income, ending balance	4,683	(9,059)	4,683	(9,059)
Interest Rate Swaps
Accumulated Other Comprehensive Income (Loss) [Line Items]
Accumulated other comprehensive income, beginning balance	(1,459)	(1,494)	(1,530)	(1,673)
Reclasses from OCI to net income	72	180	143	359
Net period OCI	72	180	143	359
Accumulated other comprehensive income, ending balance	$ (1,387)	$ (1,314)	$ (1,387)	$ (1,314)

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Accumulated change in equity from transactions and other events and circumstances from non-owner sources, net of tax effect, at period end. Excludes Net Income (Loss), and accumulated changes in equity from transactions resulting from investments by owners and distributions to owners. Includes foreign currency translation items, certain pension adjustments, unrealized gains and losses on certain investments in debt and equity securities, other than temporary impairment (OTTI) losses related to factors other than credit losses on available-for-sale and held-to-maturity debt securities that an entity does not intend to sell and it is not more likely than not that the entity will be required to sell before recovery of the amortized cost basis, as well as changes in the fair value of derivatives related to the effective portion of a designated cash flow hedge.

+ References

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

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

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

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