Segment Information (Long-Lived Assets by Geographic Region) (Details) - USD ($) $ in Thousands	Jun. 30, 2015	Dec. 31, 2014
Segment Reporting Information [Line Items]
Total long-lived assets	$ 147,005	$ 146,114
United States [Member]
Segment Reporting Information [Line Items]
Total long-lived assets	109,567	109,006
Israel [Member]
Segment Reporting Information [Line Items]
Total long-lived assets	17,758	18,982
Australia [Member]
Segment Reporting Information [Line Items]
Total long-lived assets	7,827	8,500
Netherlands [Member]
Segment Reporting Information [Line Items]
Total long-lived assets	9,458	7,686
United Kingdom [Member]
Segment Reporting Information [Line Items]
Total long-lived assets	$ 2,395	$ 1,940