Geographic Information (Summary Of Long-Lived Assets By Geographic Area) (Details) (USD $) In Thousands, unless otherwise specified	Dec. 31, 2011	Dec. 31, 2010
Revenues from External Customers and Long-Lived Assets [Line Items]
Total	$ 122,563	$ 114,294
United States [Member]
Revenues from External Customers and Long-Lived Assets [Line Items]
Total	113,791	106,970
India [Member]
Revenues from External Customers and Long-Lived Assets [Line Items]
Total	6,677	4,727
Canada [Member]
Revenues from External Customers and Long-Lived Assets [Line Items]
Total	1,896	2,350
Other International [Member]
Revenues from External Customers and Long-Lived Assets [Line Items]
Total	$ 199	$ 247