Revenue Recognition (Table Text Block)

3 Months Ended

Jun. 30, 2018

Revenue From Contract With Customer [Abstract]

Disaggregation Of Revenue [Table Text Block]

		Quarter Ended June 30,
		2018		2017
		(Unaudited)
		(In thousands)
Revenues recognized over time:	$	757,736	$	706,072
Revenues recognized at a point in time:		90,190		89,138
Total revenues recognized under ASC 606		847,926		795,210
Revenues recognized under ASC 840		95,857		83,452
Revenues recognized under ASC 944		51,189		52,046
Revenues recognized under ASC 320		24,605		27,217
Total revenues	$	1,019,577	$	957,925