Income Taxes - Narrative (Details) (USD $)	12 Months Ended
	Dec. 31, 2012	Dec. 31, 2011	Dec. 31, 2010
Valuation Allowance [Line Items]
Valuation Allowance, Deferred Tax Asset, Change in Amount	$ 864,000	$ 361,000
U.S federal net operating loss carryforwards	56,000,000	64,600,000
Net Operating Loss Carryforwards Utilization	14 years
Net Operating Loss Carryforwards Used In The Current Period		8,600,000
non-U.S. net operating loss carryforwards	150,000	250,000
Net Operating Loss Carryforwards Used in The Current Period Foreign		2,600,000
Tax Credit Reaserch And Developement	500,000
Unrecognized Tax Benefits Gross Including Interest and Penalties	2,900,000	3,500,000
Unrecognized Tax Benefits that Would Impact Effective Tax Rate	2,200,000	2,400,000
Unrecognized Tax Benefits, Income Tax Penalties and Interest Accrued	161,000	376,000
Unrecognized Tax Benefits, Income Tax Penalties and Interest Expense	215,000	12,000	400,000
Settlements with taxing authorities	0	(507,000)	0
Estimated change in unrecognized tax benefit in next twelve months, lower bound	250,000
Estimated change in unrecognized tax benefit in next twelve months, upper bound	$ 800,000