Goodwill and Other Intangible Assets - Intangible Assets (Details) - USD ($) $ in Thousands	Dec. 31, 2015	Dec. 31, 2014
Finite-Lived Intangible Assets [Line Items]
Amortizable intangible assets, carrying amount	$ 21,791	$ 12,146
Accumulated amortization	(10,770)	(10,145)
Net amortizable intangible assets	11,021	2,001
Customer lists and advertiser relationships [Member]
Finite-Lived Intangible Assets [Line Items]
Amortizable intangible assets, carrying amount	10,466	10,466
Accumulated amortization	(9,003)	(8,798)
Trade names [Member]
Finite-Lived Intangible Assets [Line Items]
Amortizable intangible assets, carrying amount	10,821	1,176
Accumulated amortization	(1,366)	(961)
Other [Member]
Finite-Lived Intangible Assets [Line Items]
Amortizable intangible assets, carrying amount	504	504
Accumulated amortization	$ (401)	$ (386)