Unrestricted Subsidiaries Unrestricted Subsidiaries (Results of Operations) (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2016	Mar. 31, 2015
Total revenues	$ 200,502	$ 161,253
Cost of revenues	34,288	28,186
Gross Profit	166,214	133,067
Selling and Marketing Expense	48,112	37,590
Research and Development Expense	8,988	8,447
General and Administrative Expense	55,776	46,500
Operating Expenses	112,876	92,537
Income from operations	53,338	40,530
Interest expense (income), net	10,233	10,313
Other expense (income), net	126	(784)
Income (loss) before income taxes	42,979	31,001
Income Tax Expense (Benefit)	13,036	9,124
Net Income (Loss), Including Portion Attributable to Noncontrolling Interest	29,943	21,877
Unrestricted Subsidiaries [Member]
Total revenues	62,457	44,420
Cost of revenues	5,311	4,354
Gross Profit	57,146	40,066
Selling and Marketing Expense	26,461	17,662
Research and Development Expense	2,482	1,901
General and Administrative Expense	22,819	17,979
Operating Expenses	51,762	37,542
Income from operations	5,384	2,524
Interest expense (income), net	4,127	2,517
Other expense (income), net	172	243
Income (loss) before income taxes	1,085	(236)
Income Tax Expense (Benefit)	580	319
Net Income (Loss), Including Portion Attributable to Noncontrolling Interest	$ 505	$ (555)