Segment Information (Long-Lived Assets by Geographic Region) (Details) - USD ($) $ in Thousands	Sep. 30, 2015	Dec. 31, 2014
Segment Reporting Information [Line Items]
Total long-lived assets	$ 144,541	$ 146,114
United States [Member]
Segment Reporting Information [Line Items]
Total long-lived assets	107,982	109,006
Israel [Member]
Segment Reporting Information [Line Items]
Total long-lived assets	17,122	18,982
Australia [Member]
Segment Reporting Information [Line Items]
Total long-lived assets	7,539	8,500
Netherlands [Member]
Segment Reporting Information [Line Items]
Total long-lived assets	9,159	7,686
United Kingdom [Member]
Segment Reporting Information [Line Items]
Total long-lived assets	$ 2,739	$ 1,940