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 [Member]
Valuation and qualifying accounts disclosure [Rollforward]
Balance at Beginning of Year	$ 1,926		$ 1,525		$ 1,619
Provision Charged (Credited) to Expense	143		364		(94)
Write-offs / Allowances Changes	(25)	[1]	40	[1]	1	[1]
Other Additions (Deductions)	8	[2]	(3)	[2]	(1)	[2]
Balance at End of Year	2,052		1,926		1,525
Deferred Tax Asset Valuation Allowance [Member]
Valuation and qualifying accounts disclosure [Rollforward]
Balance at Beginning of Year	23,723		28,123		26,765
Provision Charged (Credited) to Expense	11,807	[3]	(6,442)	[3]	703	[3]
Write-offs / Allowances Changes	(129)	[4]	1,693	[4]	281	[4]
Other Additions (Deductions)	698	[2]	349	[2]	374	[2]
Balance at End of Year	$ 36,099		$ 23,723		$ 28,123

[1] Net of collections on accounts previously written off.

[2] Consists principally of adjustments related to foreign exchange.

[3] Charge to expense in 2012 relates primarily to the increase in foreign net operating loss carry forwards which are precluded from use. Credit to expense in 2011 relates to the release of certain valuation allowances, principally for the Company's United Kingdom and Australian subsidiaries.

[4] Allowance changes arising from reductions in net operating loss carry forwards which are precluded from use and purchase accounting adjustments.