Property, Plant and Equipment

12 Months Ended

Mar. 31, 2016

Property Plant And Equipment [Abstract]

Property, Plant and Equipment

(C) Property, Plant and Equipment

Cost by major category and accumulated depreciation are summarized as follows:

	March 31,
	2016			2015
	(dollars in thousands)
Land and Quarries	$	384,688		$	345,991
Plants		1,498,387			1,378,497
Buildings, Machinery and Equipment		165,086			151,627
Construction in Progress		24,615			86,100
		2,072,776			1,962,215
Accumulated Depreciation		(817,465	)		(740,396	)
	$	1,255,311		$	1,221,819