Revenue Recognition (Table Text Block)

6 Months Ended

Sep. 30, 2018

Revenue From Contract With Customer [Abstract]

Disaggregation Of Revenue [Table Text Block]

		Quarter Ended September 30,
		2018		2017
		(Unaudited)
		(In thousands)
Revenues recognized over time:	$	835,307	$	786,065
Revenues recognized at a point in time:		84,719		84,721
Total revenues recognized under ASC 606		920,026		870,786
Revenues recognized under ASC 840		102,831		89,464
Revenues recognized under ASC 944		53,423		55,967
Revenues recognized under ASC 320		28,227		26,469
Total revenues	$	1,104,507	$	1,042,686

		Six Months Ended September 30,
		2018		2017
		(Unaudited)
		(In thousands)
Revenues recognized over time:	$	1,593,043	$	1,492,137
Revenues recognized at a point in time:		174,909		173,859
Total revenues recognized under ASC 606		1,767,952		1,665,996
Revenues recognized under ASC 840		198,688		172,916
Revenues recognized under ASC 944		104,612		108,013
Revenues recognized under ASC 320		52,832		53,686
Total revenues	$	2,124,084	$	2,000,611