Segment Information - Long-Lived Assets By Geographic Region (Details) - USD ($) $ in Thousands	Dec. 31, 2016	Dec. 31, 2015
Segment Reporting Information [Line Items]
Total long-lived assets	$ 127,487	$ 131,812
United States [Member]
Segment Reporting Information [Line Items]
Total long-lived assets	93,845	96,362
Israel [Member]
Segment Reporting Information [Line Items]
Total long-lived assets	13,940	16,393
Australia [Member]
Segment Reporting Information [Line Items]
Total long-lived assets	9,496	8,290
Netherlands [Member]
Segment Reporting Information [Line Items]
Total long-lived assets	7,495	8,285
Other [Member]
Segment Reporting Information [Line Items]
Total long-lived assets	$ 2,711	$ 2,482