Schedule II Valuation and Qualifying Accounts (Details) (USD $) In Thousands, unless otherwise specified	12 Months Ended
	Dec. 31, 2013		Dec. 31, 2012		Dec. 31, 2011
Allowance for Doubtful Accounts and Returns
Valuation and Qualifying Accounts Disclosure
Balance at beginning of year	$ 4,399		$ 4,829		$ 4,311
Charged to costs and expenses	1,279		1,427		1,888
Charged to other accounts	102	[1]	35	[1]	(91)	[1]
Deductions	(1,254)	[2]	(1,892)	[2]	(1,279)	[2]
Balance at end of year	4,526		4,399		4,829
Inventory Reserves
Valuation and Qualifying Accounts Disclosure
Balance at beginning of year	3,724		4,173		3,693
Charged to costs and expenses	1,044		2,178		4,212
Charged to other accounts	(88)	[1]	(2)	[1]	(102)	[1]
Deductions	(1,430)	[3]	(2,625)	[3]	(3,630)	[3]
Balance at end of year	3,250		3,724		4,173
Valuation Allowance for Deferred Tax Assets
Valuation and Qualifying Accounts Disclosure
Balance at beginning of year	4,719		3,229		9,170
Charged to costs and expenses	2,239		687		0
Charged to other accounts	285	[4]	803	[4]	(5,941)	[4]
Balance at end of year	$ 7,243		$ 4,719		$ 3,229

[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.