Comprehensive Income (Loss) (Accumulated Other Comprehensive Income (Loss)) (Details) (USD $) In Thousands	9 Months Ended	12 Months Ended
	Sep. 30, 2011	Dec. 31, 2010
Comprehensive Income (Loss)
Translation adjustment	$ (2,987)	$ 28
Pension liability, net of tax benefit of $4,865	(11,705)	(11,705)
Fair value on hedging transactions, net of tax (expense) benefit of ($1,714) and $1,188, respectively	(2,901)	3,523
Net unrealized losses on investments, net of tax benefit of $4,899 and $0, respectively		(8,986)
Total	(17,593)	(17,140)
Pension liability, tax benefit	4,865	4,865
Fair value on hedging transactions, net of tax (expense) benefit	1,188	(1,714)
Net unrealized losses on investments, tax benefit	$ 0	$ 4,899