CONSOLIDATED STATEMENTS OF OPERATIONS - USD ($) shares in Thousands, $ in Thousands	12 Months Ended
	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013
Income Statement [Abstract]
REVENUE	$ 462,609	$ 403,083	$ 358,086
COSTS AND EXPENSES:
Cost of revenue	224,581	199,053	184,210
Marketing	124,209	107,706	95,784
General and administrative	64,651	59,231	58,227
Depreciation and amortization	9,158	7,849	8,896
Total costs and expenses	422,599	373,839	347,117
Operating income	40,010	29,244	10,969
INTEREST EXPENSE, net	169	142	89
Income before income tax expense	39,841	29,102	10,880
INCOME TAX EXPENSE	13,698	9,791	3,510
Net income	$ 26,143	$ 19,311	$ 7,370
BASIC INCOME PER COMMON SHARE (in Dollars per Share)	$ 0.90	$ 0.67	$ 0.26
DILUTED INCOME PER COMMON SHARE (in Dollars per Share)	$ 0.89	$ 0.66	$ 0.25
WEIGHTED AVERAGE SHARES OUTSTANDING:
Basic (in Shares)	28,695	28,323	28,013
Diluted (in Shares)	29,175	28,787	28,287
DIVIDENDS DECLARED PER COMMON SHARE (in Dollars per Share)	$ 0.70	$ 0.70	$ 0.70