Basis of Presentation OCI PL reclassification (Details) (USD $) In Thousands, unless otherwise specified	9 Months Ended
	Sep. 30, 2013	Sep. 30, 2012	Dec. 31, 2012
Reclassification out of Accumulated Other Comprehensive Income [Line Items]
Accumulated Other Comprehensive Income (Loss), Net of Tax	$ 15,696		$ 14,401
Other Comprehensive Income (Loss), Net of Tax	1,295	2,986
Accumulated Translation Adjustment [Member]
Reclassification out of Accumulated Other Comprehensive Income [Line Items]
Accumulated Other Comprehensive Income (Loss), Net of Tax	12,622		10,390
othercomprehensiveincomelossbeforereclassificationsnetoftax	2,232
Reclassification from Accumulated Other Comprehensive Income, Current Period, Net of Tax	0
Other Comprehensive Income (Loss), Net of Tax	2,232
Investments [Member]
Reclassification out of Accumulated Other Comprehensive Income [Line Items]
Accumulated Other Comprehensive Income (Loss), Net of Tax	139		191
othercomprehensiveincomelossbeforereclassificationsnetoftax	(164)
Reclassification from Accumulated Other Comprehensive Income, Current Period, Net of Tax	(112)
Other Comprehensive Income (Loss), Net of Tax	(52)
Accumulated Net Gain (Loss) from Designated or Qualifying Cash Flow Hedges [Member]
Reclassification out of Accumulated Other Comprehensive Income [Line Items]
Accumulated Other Comprehensive Income (Loss), Net of Tax	(94)		(85)
othercomprehensiveincomelossbeforereclassificationsnetoftax	(51)
Reclassification from Accumulated Other Comprehensive Income, Current Period, Net of Tax	(42)
Other Comprehensive Income (Loss), Net of Tax	(9)
Net Investment Hedging [Member]
Reclassification out of Accumulated Other Comprehensive Income [Line Items]
Accumulated Other Comprehensive Income (Loss), Net of Tax	3,029		3,905
othercomprehensiveincomelossbeforereclassificationsnetoftax	(876)
Reclassification from Accumulated Other Comprehensive Income, Current Period, Net of Tax	0
Other Comprehensive Income (Loss), Net of Tax	(876)
Comprehensive Income [Member]
Reclassification out of Accumulated Other Comprehensive Income [Line Items]
Accumulated Other Comprehensive Income (Loss), Net of Tax	15,696		14,401
othercomprehensiveincomelossbeforereclassificationsnetoftax	1,141
Reclassification from Accumulated Other Comprehensive Income, Current Period, Net of Tax	(154)
Other Comprehensive Income (Loss), Net of Tax	$ 1,295