CONSOLIDATED STATEMENTS OF OPERATIONS - USD ($) shares in Thousands, $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2017	Jun. 30, 2016	Jun. 30, 2017	Jun. 30, 2016
Income Statement [Abstract]
Revenues	$ 52,400	$ 57,673	$ 104,590	$ 115,959
Operating expenses:
Cost of revenues	7,668	8,079	15,065	16,614
Product development	6,356	6,245	12,807	13,305
Sales and marketing	19,751	18,646	39,650	39,148
General and administrative	10,046	11,508	21,325	22,721
Depreciation	2,819	2,563	5,127	5,161
Amortization of intangible assets	571	2,070	1,132	4,536
Disposition related and other costs (Note 9)	1,187	77	1,187	3,347
Total operating expenses	48,398	49,188	96,293	104,832
Operating income	4,002	8,485	8,297	11,127
Interest expense	(814)	(820)	(1,604)	(1,692)
Other expense	9	(17)	(7)	(32)
Income before income taxes	3,197	7,648	6,686	9,403
Income tax expense	1,375	2,794	3,524	3,438
Net income (loss)	$ 1,822	$ 4,854	$ 3,162	$ 5,965
Basic earnings (loss) per share (in dollars per share)	$ 0.04	$ 0.10	$ 0.07	$ 0.12
Diluted earnings (loss) per share (in dollars per share)	$ 0.04	$ 0.10	$ 0.07	$ 0.12
Weighted average basic shares outstanding	47,953	48,607	47,775	49,034
Weighted average diluted shares outstanding	48,268	49,279	48,308	49,850