Schedule II Valuation and Qualifying Accounts (Details) (USD $) In Thousands, unless otherwise specified	12 Months Ended
	Dec. 31, 2012		Dec. 31, 2011		Dec. 31, 2010
Allowance for Doubtful Accounts and Returns
Valuation and Qualifying Accounts Disclosure
Balance at beginning of year	$ 4,829		$ 4,311		$ 5,077
Charged to costs and expenses	1,427		1,888		1,403
Charged to other accounts	35	[1]	(91)	[1]	(200)	[1]
Deductions	(1,892)	[2]	(1,279)	[2]	(1,969)	[2]
Balance at end of year	4,399		4,829		4,311
Inventory Reserves
Valuation and Qualifying Accounts Disclosure
Balance at beginning of year	4,173		3,693		3,997
Charged to costs and expenses	2,178		4,212		3,462
Charged to other accounts	(2)	[1]	(102)	[1]	(263)	[1]
Deductions	(2,625)	[3]	(3,630)	[3]	(3,503)	[3]
Balance at end of year	3,724		4,173		3,693
Valuation Allowance of Deferred Tax Assets
Valuation and Qualifying Accounts Disclosure
Balance at beginning of year	3,229		9,170		9,131
Charged to costs and expenses	687		0		0
Charged to other accounts	803	[4]	(5,941)	[4]	39	[4]
Balance at end of year	$ 4,719		$ 3,229		$ 9,170

[1] Primarily includes impact from foreign currency fluctuations.

[2] Includes accounts determined to be uncollectible and charged against reserves, net of collections on accounts previously charged against reserves.

[3] Includes inventory identified as excess, slow moving or obsolete and charged against reserves.

[4] Includes a valuation allowance decreased in 2011 due to results of operations and an intercompany transaction that had no impact on 2011 Net Earnings. Other years were primarily the impact from foreign currency fluctuations.