Summary of Fair Values of Assets Acquired and Liabilities Assumed Purchase Price Allocation (Details) - USD ($) $ in Thousands		12 Months Ended
	Mar. 14, 2014	Dec. 31, 2015	Dec. 31, 2014	Jan. 15, 2013
Business Acquisition [Line Items]
Goodwill		$ 103,456	$ 90,746
Total assets acquired, net of liabilities assumed		29,313
Less: contingent consideration		3,889
Skyetek, Lincoln Laser and Applimotion
Business Acquisition [Line Items]
Cash		331
Accounts receivable		3,166
Inventory		3,544
Prepaid expenses and other current assets		148
Property and equipment		3,220
Intangible assets		11,370
Goodwill		12,710
Other assets		10
Total assets acquired		34,499
Accounts payable		1,681
Other liabilities		1,197
Deferred tax liabilities		2,308
Total liabilities assumed		5,186
Less: cash acquired		331
Plus: working capital adjustments		464
Total purchase price, net of cash acquired		29,446
Less: contingent consideration		3,459
Net cash used for acquisition of businesses		$ 25,987
JADAK Acquisition
Business Acquisition [Line Items]
Cash	$ 1,140
Accounts receivable	7,907
Inventory	6,865
Property and equipment	904
Intangible assets	40,250
Goodwill	44,584
Other assets	2,064
Total assets acquired	103,714
Accounts payable	3,057
Other liabilities	2,380
Deferred tax liabilities	3,481
Total liabilities assumed	8,918
Total assets acquired, net of liabilities assumed	94,796
Less: cash acquired	1,140
Net cash used for acquisition of businesses	$ 93,656
NDS Acquisition
Business Acquisition [Line Items]
Accounts receivable				$ 10,327
Inventory				14,144
Property and equipment				2,426
Intangible assets				37,817
Goodwill				21,160
Other assets				1,782
Total assets acquired				87,656
Accounts payable				4,768
Other liabilities				7,149
Deferred tax liabilities				384
Total liabilities assumed				12,301
Total assets acquired, net of liabilities assumed				$ 75,355