Condensed Consolidated Statements of Comprehensive Income (Unaudited) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2015	Sep. 30, 2014	Sep. 30, 2015	Sep. 30, 2014
Net sales	$ 359,291	$ 352,305	$ 959,469	$ 1,056,922
Costs of goods sold	228,965	222,022	630,643	679,113
Gross profit	130,326	130,283	328,826	377,809
Operating expenses:
Selling and service	34,715	32,961	93,317	90,045
Research and development	8,332	7,822	24,907	23,580
General and administrative	13,127	13,429	40,897	39,080
Amortization of intangible assets	$ 6,285	$ 5,277	$ 17,460	15,721
Gain on remeasurement of contingent consideration				(4,877)
Total operating expenses	$ 62,459	$ 59,489	$ 176,581	163,549
Income from operations	67,867	70,794	152,245	214,260
Other (expense) income:
Interest expense	(10,210)	(12,294)	(32,241)	(35,411)
Investment income	$ 39	38	111	119
Loss on extinguishment of debt		$ (1,836)	(4,795)	(1,836)
Gain (loss) on change in contractual interest rate	$ (2,381)		(2,381)	16,014
Costs related to acquisitions	(153)	$ (396)	(153)	(396)
Other, net	(1,908)	(1,444)	(5,357)	(1,242)
Total other expense, net	(14,613)	(15,932)	(44,816)	(22,752)
Income before provision for income taxes	53,254	54,862	107,429	191,508
Provision for income taxes	19,218	18,365	38,864	66,285
Net income	$ 34,036	$ 36,497	$ 68,565	$ 125,223
Net income per common share - basic: (in dollars per share)	$ 0.50	$ 0.53	$ 1	$ 1.83
Weighted average common shares outstanding - basic: (in shares)	68,175,466	68,556,051	68,642,479	68,511,409
Net income per common share - diluted: (in dollars per share)	$ 0.49	$ 0.52	$ 0.98	$ 1.79
Weighted average common shares outstanding - diluted: (in shares)	69,182,465	70,033,224	69,781,300	70,050,953
Comprehensive income	$ 31,899	$ 35,472	$ 59,939	$ 122,474