Warranty Costs

The contractual warranty period of the Company's products generally ranges from three months to two years with certain warranties extending for longer periods. Estimated expenses related to product warranties are accrued at the time products are sold to customers and are recorded in accruals and other current liabilities on the unaudited condensed consolidated balance sheet. Estimates are established using historical information as to the nature, frequency and average costs of warranty claims. Changes in the carrying amount of accrued product warranty costs for each of the year to date periods ended June 30, 2016 and June 30, 2015 are as follows:



	June 30, 2016			June 30, 2015
Balance at beginning of period	$	9,468		$	7,792
Accrued current period warranty expense	930			1,275
Payments and adjustments	(1,161		)	(1,065		)
Balance at end of period	$	9,237		$	8,002