Geographic Information (Details) (USD $) In Thousands, unless otherwise specified	3 Months Ended		6 Months Ended
	Jun. 30, 2012	Jun. 30, 2011	Jun. 30, 2012	Jun. 30, 2011	Dec. 31, 2011
United States	$ 54,896	$ 53,247	$ 109,017	$ 97,603
All other countries	34,569	32,429	67,100	61,457
Total revenues	89,465	85,676	176,117	159,060
United States	35,590		35,590		35,498
All other countries	47,617		47,617		43,436
Total long-lived assets	83,207		83,207		78,934
Remaining Service Obligations To eFax Customers [Member]
Total revenues				$ 10,300