. Product Warranty Obligations

The Company records a liability for product warranty obligations at the time of sale to a customer based upon historical warranty experience. The Company also records a liability for specific warranty matters when they become known and are reasonably estimable.

Additionally, the Company sells extended warranty coverage for certain products. The sales of extended warranties are recorded as deferred revenue, which is recognized over the life of the contracts.

The following is a tabular reconciliation of the product warranty liability,

excluding the deferred revenue related to extended warranty coverage:

	Three Months E nded September 30 ,						Nine Months Ended September 30,
	201 6			201 5			201 6			201 5

Balance at beginning of period	$	30,735		$	28,185		$	30,197		$	30,909
Product warranty reserve assumed in acquisition		-			351			840			351
Payments		(5,424	)		(5,812	)		(13,976	)		(16,345	)
Provision for warranties issued		5,762			6,033			13,464			15,062
Changes in estimates for pre-existing warranties		286			105			834			(1,115	)
Balance at end of period	$	31,359		$	28,862		$	31,359		$	28,862

The following is a tabular reconciliation of the deferred revenue related to extended warranty coverage

	Three Months E nded September 30 ,						Nine Months Ended September 30 ,
	201 6			201 5			201 6			201 5

Balance at beginning of period	$	29,082		$	27,241		$	28,961		$	27,193
Deferred revenue on extended warranty contracts assumed in acquisition		-			291			-			291
Deferred revenue on extended warranty contracts sold		2,843			1,694			5,606			3,884
Amortization of deferred revenue on extended warranty contracts		(1,430	)		(1,138	)		(4,072	)		(3,280	)
Balance at end of period	$	30,495		$	28,088		$	30,495		$	28,088

Product warranty obligations

and extended warranty related deferred revenues are included in the condensed consolidated balance sheets as follows:

		September 30 ,		December 31,
		201 6		201 5
Product warranty liability
	Current portion - other accrued liabilities	$	21,159	$	21,726
	Long-term portion - other long-term liabilities		10,200		8,471
	Total	$	31,359	$	30,197

Deferred revenue related to extended warranty
	Current portion - other accrued liabilities	$	6,131	$	6,026
	Long-term portion - other long-term liabilities		24,364		22,935
	Total	$	30,495	$	28,961