AMORTIZABLE INTANGIBLE ASSETS (Summary of Significant Classes of Amortizable Intangible Assets) (Details) - USD ($) $ in Thousands	Sep. 30, 2015	Dec. 31, 2014
Finite-Lived Intangible Assets [Line Items]
Cost	$ 50,801	$ 46,525
Accumulated Amortization	(38,103)	(34,130)
Net	12,698	12,395
Customer lists and contracts [Member]
Finite-Lived Intangible Assets [Line Items]
Cost	19,939	19,910
Accumulated Amortization	(18,387)	(16,558)
Net	1,552	3,352
Domain and brand names [Member]
Finite-Lived Intangible Assets [Line Items]
Cost	16,555	15,465
Accumulated Amortization	(10,823)	(9,722)
Net	5,732	5,743
Favorable and assigned leases [Member]
Finite-Lived Intangible Assets [Line Items]
Cost	2,379	2,379
Accumulated Amortization	(1,864)	(1,795)
Net	515	584
Subscriber base and lists [Member]
Finite-Lived Intangible Assets [Line Items]
Cost	7,313	4,302
Accumulated Amortization	(3,453)	(2,671)
Net	3,860	1,631
Author relationships [Member]
Finite-Lived Intangible Assets [Line Items]
Cost	2,245	2,245
Accumulated Amortization	(1,487)	(1,379)
Net	758	866
Non-compete agreements [Member]
Finite-Lived Intangible Assets [Line Items]
Cost	1,034	888
Accumulated Amortization	(753)	(669)
Net	281	219
Other amortizable intangible assets [Member]
Finite-Lived Intangible Assets [Line Items]
Cost	1,336	1,336
Accumulated Amortization	$ (1,336)	$ (1,336)
Net