Guarantees (Tables)

12 Months Ended

Dec. 31, 2014

Guarantees [Abstract]

Changes in the carrying amount of service and product warranties

Changes in the carrying amount of service and product warranties for the year ended December 31, are as follows:

	2014			2013			2012
Balance as of January 1,	$	2,422		$	3,636		$	3,618
Provision for warranties	3,492			3,061			4,163
Claims made	(3,628		)	(4,275		)	(4,145		)
Balance as of December 31,	$	2,286		$	2,422		$	3,636