Accumulated Other Comprehensive Loss (Schedule Of Accumulated Other Comprehensive Loss By Component) (Details) (USD $) In Thousands, unless otherwise specified	3 Months Ended		6 Months Ended
	Jun. 30, 2014	Jun. 30, 2013	Jun. 30, 2014	Jun. 30, 2013
Accumulated other comprehensive income loss [Line Items]
Accumulated Other Comprehensive Income (Loss), Net of Tax, Beginning Balance			$ (9,094)
Other comprehensive ioss before reclassifications			(387)
Amounts reclassified from accumulated other comprehensive loss			(15)
Net current period other comprehensive oss	(358)	(87)	(402)	(732)
Accumulated Other Comprehensive Income (Loss), Net of Tax, Ending Balance	(9,496)		(9,496)
Foreign currency translaction adjustments [Member]
Accumulated other comprehensive income loss [Line Items]
Accumulated Other Comprehensive Income (Loss), Net of Tax, Beginning Balance			(8,090)
Other comprehensive ioss before reclassifications			(233)
Amounts reclassified from accumulated other comprehensive loss			0
Net current period other comprehensive oss			(233)
Accumulated Other Comprehensive Income (Loss), Net of Tax, Ending Balance	(8,323)		(8,323)
Unrealized loss on investments, net of tax [Member]
Accumulated other comprehensive income loss [Line Items]
Accumulated Other Comprehensive Income (Loss), Net of Tax, Beginning Balance			(1,433)
Other comprehensive ioss before reclassifications			(154)
Amounts reclassified from accumulated other comprehensive loss			0
Net current period other comprehensive oss			(154)
Accumulated Other Comprehensive Income (Loss), Net of Tax, Ending Balance	(1,587)		(1,587)
Other [Member]
Accumulated other comprehensive income loss [Line Items]
Accumulated Other Comprehensive Income (Loss), Net of Tax, Beginning Balance			429
Other comprehensive ioss before reclassifications			0
Amounts reclassified from accumulated other comprehensive loss			(15)
Net current period other comprehensive oss			(15)
Accumulated Other Comprehensive Income (Loss), Net of Tax, Ending Balance	$ 414		$ 414