5.	Other Current Liabilities

Other current liabilities were comprised of the following:

	September 30, 2018		December 31, 2017
Customer-related liabilities	$	16,113	$	18,512
Accrued interest payable		2,743		2,697
Accrued sales commissions		1,995		2,301
Other		8,212		13,579
Other current liabilities	$	29,063	$	37,089

Included in customer-related liabilities are costs expected to be incurred with respect to product warranties and customer deposits. The Corporation provides a limited warranty on its products, known as assurance type warranties, and may issue credit notes or replace products free of charge for valid claims. A warranty is considered an assurance type warranty if it provides the customer with assurance that the product will function as intended. Historically, warranty claims have been insignificant. The Corporation records a provision for product warranties at the time the underlying sale is recorded. The provision is based on historical experience as a percent of sales adjusted for potential claims when a liability is probable and for known claims. Changes in the liability for product warranty claims consisted of the following:

	Three Months Ended September 30,						Nine Months Ended September 30,
	2018			2017			2018			2017
Balance at beginning of the period	$	10,122		$	12,117		$	11,702		$	11,521
Satisfaction of warranty claims		(982	)		(1,169	)		(2,616	)		(2,889	)
Provision for warranty claims		508			1,011			2,496			2,964
Reversal of unneeded provision for warranty claims		(312	)		0			(1,916	)		0
Other, primarily impact from changes in foreign currency exchange rates		(17	)		328			(347	)		691
Balance at end of the period	$	9,319		$	12,287		$	9,319		$	12,287

Customer deposits represent amounts collected from, or invoiced to, a customer in advance of revenue recognition, and are recorded as an other current liability on the balance sheet. The liability for customer deposits is reversed when the Corporation satisfies its performance obligations and control of the inventory transfers to the customer, typically when title transfers. Performance obligations related to customer deposits are expected to be satisfied in less than one year. Changes in customer deposits consisted of the following:

	Three Months Ended September 30,						Nine Months Ended September 30,
	2018			2017			2018			2017
Balance at beginning of the period	$	4,889		$	7,849		$	4,573		$	6,786
Satisfaction of performance obligations		(2,027	)		(3,070	)		(7,176	)		(9,495	)
Receipt of additional deposits		1,871			1,769			7,384			9,228
Other, primarily changes in foreign currency exchange rates		(88	)		113			(136	)		142
Balance at end of the period	$	4,645		$	6,661		$	4,645		$	6,661