Segment Information (Details) (USD $) In Thousands, unless otherwise specified	12 Months Ended
	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011
Revenues	$ 520,801	$ 371,396	$ 330,159
United States	221,922	152,103
Total long-lived assets	221,922	152,103
Remaining Service Obligations To eFax Customers [Member]
Revenues			10,300
UNITED STATES
Revenues	369,507	233,585	203,153
United States	170,247	105,549
Total long-lived assets	170,247	105,549
CANADA
Revenues	73,130	79,656	83,066
IRELAND
Revenues	41,398	41,248	42,652
All Other Countries [Member]
Revenues	36,766	16,907	1,288
United States	51,675	46,554
Total long-lived assets	$ 51,675	$ 46,554