Accumulated Other Comprehensive Income Accumulated other comprehensive income components (Details) (USD $) In Thousands, unless otherwise specified	3 Months Ended
	Mar. 31, 2013	Mar. 31, 2012
Available-for-sale Securities, Change in Net Unrealized Holding Gain (Loss), Net of Tax	$ (498)	$ (122)
Accumulated Other Comprehensive Income (Loss), Net of Tax	14,762	12,749
Reclassification adjustment for losses included in net loss	248	142
Other Comprehensive Income (Loss), Foreign Currency Transaction and Translation Adjustment, Net of Tax, Portion Attributable to Parent	26	1,508
Comprehensive Income (Loss), Net of Tax, Attributable to Parent	(17,761)	(9,169)
Accumulated Other Comprehensive Income (Loss), Net of Tax	14,433	14,588
Accumulated Other Comprehensive Income (Loss) [Member]
Comprehensive Income (Loss), Net of Tax, Attributable to Parent	$ (105)	$ 311