Schedule of Changes in Accumulated Other Comprehensive Income (Details) (USD $) In Thousands, unless otherwise specified	12 Months Ended
	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011
Accumulated Other Comprehensive Income (Loss) [Line Items]
Balance at December 31, 2012	$ 1,264
Other comprehensive income (loss) before reclassifications	1,424
Amounts reclassified from accumulated other comprehensive income (loss)	0
Net current period other comprehensive income (loss)	1,424	1,466	(1,608)
Balance at December 31, 2013	2,688	1,264
Unrealized Gain (Loss) on Marketable Securities
Accumulated Other Comprehensive Income (Loss) [Line Items]
Balance at December 31, 2012	76
Other comprehensive income (loss) before reclassifications	(53)
Amounts reclassified from accumulated other comprehensive income (loss)	0
Net current period other comprehensive income (loss)	(53)
Balance at December 31, 2013	23
Foreign Currency Translation Adjustment
Accumulated Other Comprehensive Income (Loss) [Line Items]
Balance at December 31, 2012	1,188
Other comprehensive income (loss) before reclassifications	1,477
Amounts reclassified from accumulated other comprehensive income (loss)	0
Net current period other comprehensive income (loss)	1,477
Balance at December 31, 2013	$ 2,665