Warranties

The Company has warranties with various terms ranging from 18 months for parts to 25 years for certain heat exchangers. The Company has an obligation to replace parts or service its products 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						Nine months ended
	September 30, 2015			September 30, 2014			September 30, 2015			September 30, 2014
Warranty accrual:	(in thousands)
Balance, beginning of period	$	8,092		$	7,775		$	8,130		$	7,352
Payments made	(1,130		)	(1,159		)	(3,133		)	(3,294		)
Provisions	1,289			1,645			3,254			4,203
Balance, end of period	$	8,251		$	8,261		$	8,251		$	8,261

Warranty expense:	$	1,289		$	1,645		$	3,254		$	4,203