Income Taxes (Reconciliation Of The Changes To Tax Reserve) (Details) (USD $) In Thousands, unless otherwise specified	12 Months Ended
	Dec. 31, 2011	Dec. 31, 2010
Income Taxes [Abstract]
Total unrecognized tax benefits at January 1	$ 4,510	$ 5,238
Gross increases for tax positions of prior years	1,449	1,396
Gross decreases for tax positions of prior years	(364)	(2,042)
Gross increases for tax positions of current year	301	646
Increases due to acquisitions	2,412
Settlements	(1,434)	(464)
Lapse of statute of limitations	(1,513)	(221)
Changes due to currency fluctuations	(65)	(43)
Total unrecognized tax benefits at December 31	$ 5,296	$ 4,510