Segment Information (Long-Lived Assets by Geographic Region) (Details) (USD $) In Thousands, unless otherwise specified	Mar. 31, 2014	Dec. 31, 2013
Segment Reporting Information [Line Items]
Total long-lived assets	$ 74,584	$ 71,908
United States [Member]
Segment Reporting Information [Line Items]
Total long-lived assets	38,757	34,422
Israel [Member]
Segment Reporting Information [Line Items]
Total long-lived assets	21,332	22,580
Australia [Member]
Segment Reporting Information [Line Items]
Total long-lived assets	9,317	9,827
Netherlands [Member]
Segment Reporting Information [Line Items]
Total long-lived assets	3,628	3,540
United Kingdom [Member]
Segment Reporting Information [Line Items]
Total long-lived assets	$ 1,550	$ 1,539