Consolidated Statement of Operations Statement - USD ($) shares in Thousands, $ in Thousands	12 Months Ended
	Dec. 31, 2016	Dec. 31, 2015	Dec. 31, 2014
Sales Revenue, Goods, Net	$ 410,580	$ 350,834	$ 327,185
Sales Revenue, Services, Net	73,124	63,977	40,148
Total sales	483,704	414,811	367,333
Cost of Goods Sold	192,694	164,889	154,039
Cost of Services	37,863	33,052	25,234
Total cost of sales	230,557	197,941	179,273
Gross profit	253,147	216,870	188,060
Research and development	44,445	39,551	36,915
Selling, general and administrative	77,678	66,097	58,549
Amortization of intangible assets	4,167	4,368	4,998
Restructuring expense	0	198	1,507
Total operating expenses	126,290	110,214	101,969
Operating income	126,857	106,656	86,091
Other income (expense), net	1,219	(1,214)	(86)
Income from continuing operations before income taxes	128,076	105,442	86,005
Provision for income taxes	11,128	21,960	16,510
Income from continuing operations	116,948	83,482	69,495
Income (loss) from discontinued operations, net of income taxes	10,506	(241,968)	(22,513)
Net income (loss)	$ 127,454	$ (158,486)	$ 46,982
Basic weighted-average common shares outstanding	39,720	40,746	40,420
Diluted weighted-average common shares outstanding	40,031	41,077	41,034
Income (Loss) from Continuing Operations, Per Basic Share	$ 2.94	$ 2.05	$ 1.72
Income (Loss) from Continuing Operations, Per Diluted Share	2.92	2.03	1.69
Income (Loss) from Discontinued Operations and Disposal of Discontinued Operations, Net of Tax, Per Basic Share	0.26	(5.94)	(0.56)
Income (Loss) from Discontinued Operations and Disposal of Discontinued Operations, Net of Tax, Per Diluted Share	0.26	(5.94)	(0.56)
Basic earnings (loss) per share	3.21	(3.89)	1.16
Diluted earnings (loss) per share	$ 3.18	$ (3.89)	$ 1.14