Geographic Information (Details) (USD $) In Thousands, unless otherwise specified	3 Months Ended	12 Months Ended
	Dec. 31, 2012	Dec. 31, 2012	Dec. 31, 2011	Dec. 31, 2010
United States	$ 233,585		$ 203,153	$ 208,779
Total revenues	371,396	371,396	330,159	255,394
United States	105,549	105,549	35,498
All other countries	46,554	46,554	43,436
Total long-lived assets	152,103	152,103	78,934
Remaining Service Obligations To eFax Customers [Member]
Total revenues			10,300
CANADA
All other countries	79,656		83,066	8,310
IRELAND
All other countries	41,248		42,652	38,038
All Other Countries [Member]
All other countries		$ 16,907	$ 1,288	$ 267