Segment Information (Long-Lived Assets by Geographic Region) (Details) (USD $) In Thousands, unless otherwise specified	Sep. 30, 2013	Dec. 31, 2012
Segment Reporting Information [Line Items]
Total long-lived assets	$ 72,145	$ 72,422
United States [Member]
Segment Reporting Information [Line Items]
Total long-lived assets	36,042	35,711
Israel [Member]
Segment Reporting Information [Line Items]
Total long-lived assets	23,790	23,750
Australia [Member]
Segment Reporting Information [Line Items]
Total long-lived assets	10,124	10,361
United Kingdom [Member]
Segment Reporting Information [Line Items]
Total long-lived assets	1,633	2,600
Netherlands [Member]
Segment Reporting Information [Line Items]
Total long-lived assets	$ 556