Commitments and Contingencies (Tables)

12 Months Ended

Dec. 31, 2012

Commitments and Contingencies Disclosure [Abstract]

Schedule of Future Minimum Rental Payments for Operating Leases

Minimum commitments under long-term non-cancelable operating leases, principally for equipment and facilities at December 31, 2012, were as follows:

2013	$	7,842
2014	4,847
2015	4,045
2016	2,520
2017	2,236
Thereafter	16,752
	$	38,242

Schedule of Product Warranty Liability

Changes in the product warranty accrual are summarized follows:

	Year Ended
	December 31, 2012			December 30, 2011			December 31, 2010
Balance, beginning of year	$	5,050		$	5,561		$	5,242
Payments made or service provided	(2,849		)	(4,340		)	(3,225		)
Warranty expense	2,948			3,445			3,671
Foreign currency translation	(51		)	384			(127		)
Balance, end of year	$	5,098		$	5,050		$	5,561