Warranty Costs (Tables)

6 Months Ended

Jun. 30, 2016

Guarantees [Abstract]

Changes in Carrying Amount of Accrued Product Warranty Costs

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