Warranty

We provide service and warranty policies on our products. From time to time, we also voluntarily incur costs for certain warranty-type expenses occurring after the normal warranty period to help protect the reputation of our products and the goodwill of our customers. Warranty expense is affected by dealership labor rates, the cost of parts and the frequency of claims. Estimated costs related to product warranty are accrued at the time of sale and are based upon historical warranty and service claims experience. Adjustments are made to accruals as claim data and cost experience becomes available.

Changes in our product warranty liability are as follows:



	Three Months Ended
(In thousands)	November 26, 2016			November 28, 2015
Balance at beginning of period	$	12,412		$	11,254
Provision	3,898			3,594
Claims paid	(4,663		)	(3,263		)
Acquisition of Grand Design	12,904			—
Balance at end of period	$	24,551		$	11,585