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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

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