Significant Accounting Policies Accumulated Other Comprehensive Income (Loss) (Details) (USD $) In Thousands, unless otherwise specified	Sep. 30, 2012	Dec. 31, 2011
Cumulative foreign currency translation adjustments	$ 9,722	$ 8,338
Translation Adjustment Recorded in Disposition of Business	(9,722)	0
Unrealized (loss) gain on fair value of investments	(276)	(277)
Pension and postemployment benefits	(1,752)	(1,029)
Accumulated Other Comprehensive Income (Loss), Net of Tax	$ (2,028)	$ 7,032