Product Warranties

6 Months Ended

Jun. 30, 2019

Product Warranties Disclosures [Abstract]

Product Warranties

PRODUCT WARRANTIES

Our products carry defined warranties for defects in materials or workmanship which, according to their terms, generally obligate us to pay the costs of supplying and shipping replacement parts to customers and, in certain instances, pay for labor and other costs to service products. Outstanding product warranty periods range from thirty days to, in limited circumstances, the lifetime of certain product components. We record a liability at the time of sale for the estimated costs of fulfilling future warranty claims. If necessary, we adjust the liability for specific warranty-related matters when they become known and are reasonably estimable. Estimated warranty expense is included in cost of sales, based on historical warranty claim experience and available product quality data. Warranty expense is affected by the performance of new products, significant manufacturing or design defects not discovered until after the product is delivered to the customer, product failure rates, and higher or lower than expected repair costs. If warranty expense differs from previous estimates, or if circumstances change such that the assumptions inherent in previous estimates are no longer valid, the amount of product warranty obligations is adjusted accordingly.

Changes in our product warranty obligations were as follows (in thousands):

	Six Months Ended June 30,
	2019			2018
Balance, beginning of period	$	5,575		$	6,117
Accruals	2,703			1,834
Payments	(2,790		)	(2,249		)
Balance, end of period	$	5,488		$	5,702