Product Warranty (Tables)

3 Months Ended

Jun. 30, 2018

Guarantees And Product Warranties [Abstract]

Change in the Company's Warranty Accrual

The following table reflects the change in the Company’s warranty accrual during the three months ended June 30, 2018 and 2017:

	Three Months Ended
	June 30, 2018			June 30, 2017
	(In thousands)
Balance, beginning of period	$	6,914		$	11,058
Change in liability for warranties issued in period		475			215
Settlements made (in cash or in kind) during the    period		(914	)		(1,470	)
Balance, end of period	$	6,475		$	9,803