Income Taxes (Details 5) (USD $) In Thousands, unless otherwise specified	12 Months Ended
	Dec. 31, 2012	Dec. 31, 2011	Dec. 31, 2010
Reconciliation of unrecognized tax benefits
Unrecognized tax benefits at January 1	$ 1,269	$ 1,222	$ 919
Additions for tax positions of prior years	112	107	410
Reductions for tax positions of prior years	(37)
Additions for tax positions of current year	1,271	17	77
Settlements	(582)
Lapse of statute of limitations	(360)	(77)	(184)
Translation adjustments	(2)
Unrecognized tax benefits at December 31	$ 1,671	$ 1,269	$ 1,222