Accumulated Other Comprehensive Income (loss) (Table Text Block)

3 Months Ended

Jun. 30, 2019

Table Text Block Supplement [Abstract]

Summary of accumulated other comprehensive income (loss) components, net of tax

		Foreign Currency Translation		Unrealized Net Gain on Investments		Fair Market Value of Cash Flow Hedges		Postretirement Benefit Obligation Net Loss		Accumulated Other Comprehensive Income (Loss)
		(Unaudited)
		(In thousands)
Balance at March 31, 2019	$	(56,612)	$	(7,259)	$	107	$	(2,934)	$	(66,698)
Foreign currency translation		2,982		0		0		0		2,982
Unrealized net gain on investments		0		40,788		0		0		40,788
Change in fair value of cash flow hedges		0		0		(945)		0		(945)
Other comprehensive income (loss)		(2,093)		40,788		(945)		0		42,825
Balance at June 30, 2019	$	(58,705)	$	33,529	$	(838)	$	(2,934)	$	(23,873)