Condensed Consolidated Statements Of Income - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2020	Mar. 31, 2019
Revenues:
Revenues	$ 332,393	$ 299,893
Cost of Revenue	59,131	51,013
Gross profit	273,262	248,880
Operating expenses:
Sales and marketing (1)	99,438	86,880
Research, development and engineering (1)	15,406	12,984
General and administrative (1)	103,171	98,154
Total operating expenses	218,015	198,018
Income from operations	55,247	50,862
Interest expense, net	20,971	16,019
Gain (Loss) on Investments	(20,832)	(13)
Other expense, net	6,876	2,202
Income before income taxes and net loss in earnings of equity method investment	6,568	32,628
Income tax expense (benefit)	8,703	(295)
Net loss in earnings of equity method investment	4,269	474
Net (loss) income	$ (6,404)	$ 32,449
Net income per common share:
Basic	$ (0.13)	$ 0.67
Diluted EPS impact	$ (0.13)	$ 0.66
Weighted average shares outstanding:
Basic	47,620,774	47,560,749
Diluted	47,620,774	48,509,181
Share-based Payment Arrangement, Expense	$ 6,313	$ 5,086
Cost of Sales [Member]
Share-based Payment Arrangement, Expense	134	132
Selling and Marketing Expense [Member]
Share-based Payment Arrangement, Expense	398	404
Research and Development Expense [Member]
Share-based Payment Arrangement, Expense	431	358
General and Administrative Expense [Member]
Share-based Payment Arrangement, Expense	$ 5,350	$ 4,192