Consolidated Statements of Comprehensive Income - USD ($) $ in Thousands	3 Months Ended												6 Months Ended			9 Months Ended			12 Months Ended
	Dec. 31, 2015	Sep. 30, 2015	Jun. 30, 2015	Mar. 31, 2015	Dec. 31, 2014	Sep. 30, 2014	Jun. 30, 2014	Mar. 31, 2014	Dec. 31, 2013	Sep. 30, 2013	Jun. 30, 2013	Mar. 31, 2013	Jun. 30, 2015	Jun. 30, 2014	Jun. 30, 2013	Sep. 30, 2015	Sep. 30, 2014	Sep. 30, 2013	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013
Income Statement [Abstract]
REVENUES	$ 279,977	$ 256,801	$ 220,920	$ 227,378	$ 202,856	$ 127,698	$ 133,872	$ 90,622	$ 84,953	$ 81,892	$ 77,012	$ 73,854	$ 448,298	$ 224,494	$ 150,866	$ 705,099	$ 352,192	$ 232,758	$ 985,076	$ 555,048	$ 317,711
Cost of sales (exclusive of amortization of intangibles, included within operating expenses below)	105,547	93,789	92,513	97,215	97,523	82,198	73,000	40,966	37,983	38,195	34,920	34,709	189,728	113,967	69,629	283,517	196,165	107,824	389,064	293,688	145,807
GROSS PROFIT	174,430	163,012	128,407	130,163	105,333	45,500	60,871	49,656	46,970	43,697	42,092	39,145	258,570	110,527	81,237	421,582	156,027	124,934	596,012	261,360	171,904
Selling, general and administrative expenses	51,980	45,031	35,208	29,986	28,402	26,799	21,168	16,586	14,415	13,645	13,113	12,335	65,194	37,754	25,448	110,225	64,553	39,093	162,205	92,955	53,508
Acquisition-related costs	129	230	225	1,257	3,287	8,159	20,940	454	934	1,459		519	1,482	21,394	519	1,712	29,553	1,978	1,841	32,840	2,912
Research and development expenses	10,404	10,439	10,588	9,276	8,491	8,758	9,588	4,419	4,001	4,837	5,051	5,969	19,864	14,007	11,020	30,303	22,765	15,857	40,707	31,256	19,858
Amortization of intangibles	17,066	16,545	16,284	16,377	16,483	13,814	8,439	4,757	2,444	1,568	1,677	1,733	32,661	13,196	3,410	49,206	27,010	4,978	66,272	43,493	7,422
Impairment of intangible assets	30,376																		30,376
TOTAL OPERATING EXPENSES	109,955	72,245	62,305	56,896	56,663	57,530	60,135	26,216	21,794	21,509	19,841	20,556	119,201	86,351	40,397	191,446	143,881	61,906	301,401	200,544	83,700
OPERATING INCOME (LOSS)	64,475	90,767	66,102	73,267	48,670	(12,030)	736	23,440	25,176	22,188	22,251	18,589	139,369	24,176	40,840	230,136	12,146	63,028	294,611	60,816	88,204
Amortization of deferred financing costs	(1,175)	(1,086)	(1,026)	(996)	(1,116)	(2,272)	(2,346)	(4,251)	(220)	(211)	(207)	(204)	(2,022)	(6,597)	(411)	(3,108)	(8,869)	(622)	(4,283)	(9,985)	(842)
Interest expense, net	(12,606)	(12,652)	(13,235)	(13,480)	(13,777)	(11,804)	(7,917)	(2,161)	(2,262)	(2,155)	(2,028)	(2,204)	(26,715)	(10,076)	(4,232)	(39,367)	(21,880)	(6,387)	(51,973)	(35,657)	(8,649)
Equity in earnings of unconsolidated joint venture									80			76			76			76			80
Bargain purchase gain				849					3,707				849			849			849		3,707
Gain from product divestiture					(40)	847	8,490							8,490			9,337			9,297
Other non-operating income (expense), net	(1,239)	(3,014)	(1,483)	(1,312)	(492)	1,012	(214)	567	193	160	(34)	76	(2,795)	351	42	(5,809)	1,363	202	(7,048)	871	395
INCOME (LOSS) FROM CONTINUING OPERATIONS BEFORE INCOME TAXES	49,455	74,015	50,358	58,328	33,245	(24,247)	(1,251)	17,595	26,674	19,982	19,982	16,257	108,686	16,344	36,239	182,701	(7,903)	56,221	232,156	25,342	82,895
Income tax provision (benefit)	16,670	26,048	17,850	20,790	15,266	(11,914)	(499)	8,101	9,996	7,777	7,345	5,415	38,640	7,602	12,760	64,688	(4,312)	20,537	81,358	10,954	30,533
INCOME (LOSS) FROM CONTINUING OPERATIONS	32,785	47,967	32,508	37,538	17,979	(12,333)	(752)	9,494	16,678	12,205	12,637	10,842	70,046	8,742	23,479	118,013	(3,591)	35,684	150,798	14,388	52,362
Loss from discontinued operations, net of tax (in Dollars)							(504)							(504)			(504)			(504)
CONSOLIDATED NET INCOME (LOSS)	$ 32,785	$ 47,967	$ 32,508	$ 37,538	$ 17,979	$ (12,333)	$ (1,256)	$ 9,494	$ 16,678	$ 12,205	$ 12,637	$ 10,842	$ 70,046	$ 8,238	$ 23,479	$ 118,013	$ (4,095)	$ 35,684	$ 150,798	$ 13,884	$ 52,362
CONSOLIDATED NET INCOME PER COMMON SHARE:
Income (loss) from continuing operations, basic (in Dollars per share)	$ 0.27	$ 0.40	$ 0.28	$ 0.33	$ 0.17	$ (0.12)	$ (0.01)	$ 0.10	$ 0.17	$ 0.13	$ 0.13	$ 0.11	$ 0.61	$ 0.09	$ 0.24	$ 1.02	$ (0.04)	$ 0.37	$ 1.29	$ 0.14	$ 0.54
Loss from discontinued operations, basic (in Dollars per share)														(0.01)						(0.01)
CONSOLIDATED NET INCOME (loss), BASIC (in Dollars per share)	0.27	0.40	0.28	0.33	0.17	(0.12)	(0.01)	0.10	0.17	0.13	0.13	0.11	0.61	0.08	0.24	1.02	(0.04)	0.37	1.29	0.13	0.54
Income (loss) from continuing operations, diluted (in Dollars per share)	0.27	0.39	0.27	0.31	0.16	(0.12)	(0.01)	0.08	0.13	0.11	0.11	0.10	0.57	0.07	0.21	0.96	(0.04)	0.32	1.22	0.13	0.46
CONSOLIDATED NET INCOME, DILUTED (in Dollars per share)	$ 0.27	$ 0.39	$ 0.27	$ 0.31	$ 0.16	$ (0.12)	$ (0.01)	$ 0.08	$ 0.13	$ 0.11	$ 0.11	$ 0.10	$ 0.57	$ 0.07	$ 0.21	$ 0.96	$ (0.04)	$ 0.32	$ 1.22	$ 0.13	$ 0.46
SHARES USED IN COMPUTING CONSOLIDATED NET INCOME PER COMMON SHARE:
BASIC (in Shares)	119,390	119,260	115,808	113,352,000	108,515	105,438	103,183	96,633,000	96,431	96,238	96,122	95,926,000	114,587	99,926	96,025	116,162	101,784	96,096	116,980,000	103,480,000	96,181,000
DILUTED (in Shares)	125,698	125,891	125,919	125,377,000	124,491	105,438	103,183	116,884,000	113,898	113,717	112,328	111,551,000	125,650	117,576	112,010	125,738	101,784	112,644	125,762,000	109,588,000	113,898,000
COMPREHENSIVE INCOME:
Consolidated net income (loss)	$ 32,785	$ 47,967	$ 32,508	$ 37,538	$ 17,979	$ (12,333)	$ (1,256)	$ 9,494	$ 16,678	$ 12,205	$ 12,637	$ 10,842	$ 70,046	$ 8,238	$ 23,479	$ 118,013	$ (4,095)	$ 35,684	$ 150,798	$ 13,884	$ 52,362
Unrealized holding gain (loss) on available-for-sale securities, net of tax of ($61), $663 and $0 for the years ended December 31, 2015, 2014 and 2013, respectively	191	(277)	89	101	(2,193)	1,070							190			(87)	1,070		104	(1,124)
Foreign currency translation loss, net of tax of $1,057, $877 and $3,328 for the years ended December 31, 2015, 2014 and 2013, respectively	(632)	(3,332)	(95)	2,008	(1,790)	(1,466)	(153)	1,705	761	(2,603)	(4,979)	358	1,913	1,552	(4,621)	(1,419)	86	(7,224)	(2,051)	(1,704)	(6,463)
COMPREHENSIVE INCOME (LOSS)	$ 32,344	$ 44,358	$ 32,502	$ 39,647	$ 13,996	$ (12,729)	$ (1,409)	$ 11,199	$ 17,439	$ 9,602	$ 7,658	$ 11,200	$ 72,149	$ 9,790	$ 18,858	$ 116,507	$ (2,939)	$ 28,460	$ 148,851	$ 11,056	$ 45,899