Business Combinations - Additional Information (Details) - USD ($)						1 Months Ended		10 Months Ended		12 Months Ended
	Dec. 18, 2015	Nov. 09, 2015	Feb. 19, 2015	Mar. 14, 2014	Jan. 15, 2013	Dec. 31, 2015	Sep. 30, 2014	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2013
Business Acquisition [Line Items]
Future contingent consideration						$ 3,889,000		$ 3,889,000		$ 3,889,000
Goodwill						103,456,000		103,456,000	$ 90,746,000	103,456,000	$ 90,746,000
Payments to acquire businesses net of cash acquired and escrow recovery										25,987,000	88,238,000	$ 80,773,000
Recognized acquisition costs										1,301,000	1,521,000	1,630,000
Skyetek Inc.
Business Acquisition [Line Items]
Total purchase price	$ 2,800,000
Net cash used for acquisition of business	2,600,000
Future contingent consideration	200,000					200,000		200,000		200,000
Undiscounted range of outcomes, minimum	0
Undiscounted range of outcomes, maximum	$ 300,000
Skyetek Inc. | Maximum
Business Acquisition [Line Items]
Business combination estimated additional payment						100,000		100,000		100,000
Lincoln Laser Company
Business Acquisition [Line Items]
Total purchase price		$ 12,600,000
Net cash used for acquisition of business		10,300,000
Future contingent consideration		2,300,000
Undiscounted range of outcomes, minimum		0
Undiscounted range of outcomes, maximum		$ 6,000,000
Revenues						1,900,000
Income (loss) from continuing operations before income taxes						(300,000)
Business combination estimated additional cash receipt						500,000		500,000		500,000
Applimotion Inc.
Business Acquisition [Line Items]
Total purchase price			$ 14,000,000
Net cash used for acquisition of business			13,000,000
Future contingent consideration			1,000,000
Undiscounted range of outcomes, minimum			0
Undiscounted range of outcomes, maximum			$ 4,000,000
Revenues								14,000,000
Income (loss) from continuing operations before income taxes								1,000,000
Membership interests acquired			100.00%
Skyetek, Lincoln Laser and Applimotion
Business Acquisition [Line Items]
Total purchase price										29,446,000
Future contingent consideration						3,459,000		3,459,000		3,459,000
Goodwill						12,710,000		12,710,000		12,710,000
Intangible assets						11,370,000		11,370,000		11,370,000
Goodwill and intangible assets expected to be deductible for tax purposes						$ 10,300,000		$ 10,300,000		10,300,000
Total purchase price, net of cash acquired										25,987,000
JADAK Acquisition
Business Acquisition [Line Items]
Revenues									45,400,000
Income (loss) from continuing operations before income taxes									$ (2,700,000)
Membership interests acquired				100.00%
Goodwill				$ 44,584,000
Intangible assets				40,250,000
Goodwill and intangible assets expected to be deductible for tax purposes				61,800,000
Total purchase price, net of cash acquired				$ 93,656,000
JADAK, LLC
Business Acquisition [Line Items]
Membership interests acquired				100.00%
JADAK Technologies, Inc
Business Acquisition [Line Items]
Membership interests acquired				100.00%
Advanced Data Capture Corporation
Business Acquisition [Line Items]
Membership interests acquired				100.00%
NDS Surgical Imaging, LLC
Business Acquisition [Line Items]
Membership interests acquired					100.00%
NDS Surgical Imaging KK
Business Acquisition [Line Items]
Membership interests acquired					100.00%
NDS Acquisition
Business Acquisition [Line Items]
Net cash used for acquisition of business					$ 80,800,000
Revenues													$ 68,400,000
Income (loss) from continuing operations before income taxes													$ (3,400,000)
Goodwill					21,160,000
Intangible assets					37,817,000
Escrow after the payments of closing working capital adjustments					$ 5,400,000
Escrow recovery was accounted for as a reduction to goodwill							$ 5,400,000
Remaining escrow amount received							5,400,000
Payments to acquire businesses net of cash acquired and escrow recovery							$ 75,400,000
Skyetek, Lincoln Laser, Applimotion, JADAK and NDS
Business Acquisition [Line Items]
Recognized acquisition costs										$ 900,000	$ 700,000	$ 1,500,000