Property, Plant and Equipment (Tables)

9 Months Ended

Dec. 31, 2016

Property, Plant and Equipment [Abstract]

Schedule of property, plant and equipment

Property, plant and equipment consists of the following (amounts in thousands):

	December 31, 2016		March 31, 2016
Land	$	73,474	$	63,907
Building and building improvements	499,793		458,379
Machinery and equipment	1,752,480		1,645,617
Projects in process	112,201		99,370
Total property, plant and equipment, gross	2,437,948		2,267,273
Less accumulated depreciation and amortization	1,739,244		1,657,877
Total property, plant and equipment, net	$	698,704	$	609,396