Other Comprehensive Income (Loss) Pretax Amounts by Component, Reclassified from Accumulated Other Comprehensive Loss to Earnings (Details) - Reclassification out of Accumulated Other Comprehensive Income - Pensions, Net of Tax - USD ($) $ in Thousands		3 Months Ended
		Jun. 30, 2016	Jun. 30, 2015
Reclassification Out Of Accumulated Other Comprehensive Income [Line Items]
Actuarial loss	[1]	$ 628	$ 961
Amortization of prior service cost	[1]	(167)	39
Amounts reclassified from accumulated other comprehensive losses to net earnings	[1]	$ 461	$ 1,000

[1] Amounts are included in net periodic benefit costs for pension and postretirement plans. See Note 13 "Pension and Postretirement Benefits" to the "Notes to Condensed Consolidated Financial Statements" for further information.