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Acquisition of New York Code and Design Academy - Purchase Price Allocation (Details) - USD ($) |  | 3 Months Ended | 9 Months Ended |
--- | --- | --- | --- | ---
Jan. 13, 2016 | Sep. 30, 2017 | Jun. 30, 2017 | Sep. 30, 2016 | Sep. 30, 2017 | Sep. 30, 2016 | Dec. 31, 2016
Business Acquisition [Line Items] |  |  |  |  |  |  |
Goodwill |  | $ 20,744,000 |  |  | $ 20,744,000 |  | $ 20,744,000
Cash paid for acquisition, net of cash acquired |  |  |  |  |  | $ 7,635,000 |
Deferred payment arrangements value |  | 3,200,000 |  |  | $ 3,200,000 |  | $ 3,400,000
New York Code And Design Academy, Inc. |  |  |  |  |  |  |
Business Acquisition [Line Items] |  |  |  |  |  |  |
Cash | $ 790,000 |  |  |  |  |  |
Other assets | 1,265,000 |  |  |  |  |  |
Trade name | 5,660,000 |  |  |  |  |  |
Goodwill | 13,944,000 |  |  |  |  |  |
Liabilities assumed | (4,734,000) |  |  |  |  |  |
Total assets acquired and liabilities assumed, net | 16,925,000 |  |  |  |  |  |
Less: contingent consideration | (14,500,000) |  |  |  |  |  |
Cash paid for acquisition, net of cash acquired | 1,635,000 |  |  |  |  |  |
Discount rate |  |  |  |  | 4.50% |  |
Reduction in fair value of contingent consideration |  | 5,500,000 | $ 2,300,000 | $ 0 |  | $ 0 |
Deferred payment arrangements value |  | 0 |  |  | $ 0 |  |
New York Code And Design Academy, Inc. | Maximum |  |  |  |  |  |  |
Business Acquisition [Line Items] |  |  |  |  |  |  |
Contingent consideration |  | $ 11,500,000 |  |  | $ 11,500,000 |  |
New York Code And Design Academy, Inc. | Contingent Consideration Results of Operations Over Five Year Period [Member] |  |  |  |  |  |  |
Business Acquisition [Line Items] |  |  |  |  |  |  |
Contingent consideration | 12,500,000 |  |  |  |  |  |
New York Code And Design Academy, Inc. | Contingent Consideration Receipt Of State Regulatory Permit [Member] |  |  |  |  |  |  |
Business Acquisition [Line Items] |  |  |  |  |  |  |
Contingent consideration | 5,500,000 |  |  |  |  |  |
New York Code And Design Academy, Inc. | Contingent Consideration Accelerated Earnout Upon Receipt Of One State Regulatory Permit [Member] |  |  |  |  |  |  |
Business Acquisition [Line Items] |  |  |  |  |  |  |
Contingent consideration | $ 1,000,000 |  |  |  |  |  |

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