Warranties

3 Months Ended

Mar. 31, 2021

Guarantees [Abstract]

Warranties

Warranties

The Company has product warranties with various terms ranging from one year from the date of first use or 18 months for parts to 25 years for certain heat exchangers. The Company has an obligation to replace parts if conditions under the warranty are met. A provision is made for estimated warranty costs at the time the related products are sold based upon the warranty period, historical trends, new products, and any known identifiable warranty issues.  

Changes in the warranty accrual are as follows:

	Three Months Ended
	March 31, 2021		March 31, 2020
Warranty accrual:	(in thousands)
Balance, beginning of period	$	13,522	$	12,652
Payments made	(1,464)		(1,177)
Provisions	1,467		1,465
Balance, end of period	$	13,525	$	12,940
Warranty expense:	$	1,467	$	1,465