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Business Acquisitions - Total Purchase Price Allocation (Details) - USD ($) $ in Thousands |  |  |  | 6 Months Ended |
--- | --- | --- | --- | --- | ---
Jan. 05, 2016 | Apr. 30, 2015 | Apr. 30, 2015 | Apr. 21, 2015 | Jun. 30, 2016 | Jun. 30, 2015 | Dec. 31, 2015
Business Acquisition [Line Items] |  |  |  |  |  |  |
Cash |  | $ 3,789 | $ 3,789 |  |  |  |
Accounts receivable |  | 7,350 | 7,350 |  |  |  |
Inventory |  | 5,008 | 5,008 |  |  |  |
Deferred tax assets and other current assets |  | 457 | 457 |  |  |  |
Total current assets |  | 16,604 | 16,604 |  |  |  |
Property and equipment |  | 463 | 463 |  |  |  |
Intangible assets |  | 14,051 | 14,051 |  |  |  |
Goodwill |  | 26,197 | 26,197 |  | $ 311,170 |  | $ 147,906
Other non-current assets |  | 52 | 52 |  |  |  |
Total assets |  | 57,367 | 57,367 |  |  |  |
Current liabilities |  | 7,809 | 7,809 |  |  |  |
Non-current deferred tax liabilities |  | 3,833 | 3,833 |  |  |  |
Deferred service revenue and gross profit |  | 3,242 | 3,242 |  |  |  |
Other non-current liabilities |  | 1,056 | 1,056 |  |  |  |
Total purchase price |  | 41,427 | 41,427 |  |  |  |
Total purchase price, net of cash received |  |  | 37,638 |  | $ 271,458 | $ 23,625 |
Aesynt Holding, L.P., Aesynt, Ltd. |  |  |  |  |  |  |
Business Acquisition [Line Items] |  |  |  |  |  |  |
Cash | $ 8,200 |  |  |  |  |  |
Accounts receivable | 44,412 |  |  |  |  |  |
Inventory | 20,111 |  |  |  |  |  |
Other current assets | 4,381 |  |  |  |  |  |
Total current assets | 77,068 |  |  |  |  |  |
Property and equipment | 10,389 |  |  |  |  |  |
Intangible assets | 123,700 |  |  |  |  |  |
Goodwill | 165,618 |  |  |  |  |  |
Other non-current assets | 968 |  |  |  |  |  |
Total assets | 377,743 |  |  |  |  |  |
Current liabilities | 26,132 |  |  |  |  |  |
Deferred revenue, net | 25,631 |  |  |  |  |  |
Non-current deferred tax liabilities | 43,927 |  |  |  |  |  |
Other non-current liabilities | 2,431 |  |  |  |  |  |
Total liabilities | 98,121 |  |  |  |  |  |
Total purchase price | 279,622 |  |  |  |  |  |
Total purchase price, net of cash received | $ 271,500 |  |  |  |  |  |
Mach4 |  |  |  |  |  |  |
Business Acquisition [Line Items] |  |  |  |  |  |  |
Cash |  |  |  | $ 397 |  |  |
Accounts receivable |  |  |  | 3,743 |  |  |
Inventory |  |  |  | 3,580 |  |  |
Deferred tax assets and other current assets |  |  |  | 368 |  |  |
Total current assets |  |  |  | 8,088 |  |  |
Property and equipment |  |  |  | 463 |  |  |
Intangible assets |  |  |  | 7,710 |  |  |
Goodwill |  |  |  | 10,591 |  |  |
Other non-current assets |  |  |  | 52 |  |  |
Total assets |  |  |  | 26,904 |  |  |
Current liabilities |  |  |  | 3,684 |  |  |
Non-current deferred tax liabilities |  |  |  | 2,564 |  |  |
Deferred service revenue and gross profit |  |  |  | 2,314 |  |  |
Other non-current liabilities |  |  |  | 1,056 |  |  |
Total purchase price |  |  |  | 17,286 |  |  |
Total purchase price, net of cash received |  |  |  | $ 16,889 |  |  |
Avantec |  |  |  |  |  |  |
Business Acquisition [Line Items] |  |  |  |  |  |  |
Cash |  | 3,392 | 3,392 |  |  |  |
Accounts receivable |  | 3,607 | 3,607 |  |  |  |
Inventory |  | 1,428 | 1,428 |  |  |  |
Deferred tax assets and other current assets |  | 89 | 89 |  |  |  |
Total current assets |  | 8,516 | 8,516 |  |  |  |
Property and equipment |  | 0 | 0 |  |  |  |
Intangible assets |  | 6,341 | 6,341 |  |  |  |
Goodwill |  | 15,606 | 15,606 |  |  |  |
Other non-current assets |  | 0 | 0 |  |  |  |
Total assets |  | 30,463 | 30,463 |  |  |  |
Current liabilities |  | 4,125 | 4,125 |  |  |  |
Non-current deferred tax liabilities |  | 1,269 | 1,269 |  |  |  |
Deferred service revenue and gross profit |  | 928 | 928 |  |  |  |
Other non-current liabilities |  | 0 | 0 |  |  |  |
Total purchase price |  | 24,141 | $ 24,141 |  |  |  |
Total purchase price, net of cash received |  | $ 20,749 |  |  |  |  |

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