Disaggregation of revenue (Table Text Block)

12 Months Ended

Mar. 31, 2019

Revenue From Contract With Customer [Abstract]

Disaggregation of revenue

		Years Ended March 31,
		2019		2018		2017
		(In thousands)
Revenues recognized over time	$	2,814,732	$	2,617,990	$	2,494,060
Revenues recognized at a point in time		305,408		301,152		291,886
Total revenues recognized under ASC 606		3,120,140		2,919,142		2,785,946
Revenues recognized under ASC 840		406,070		353,924		311,403
Revenues recognized under ASC 944		131,563		217,575		222,142
Revenues recognized under ASC 320		110,934		110,473		102,276
Total revenues	$	3,768,707	$	3,601,114	$	3,421,767