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Significant Accounting Policies (Details) | 3 Months Ended | 9 Months Ended | 12 Months Ended
--- | --- | --- | ---
Sep. 30, 2017 USD ($) Clients | Sep. 30, 2016 USD ($) Clients | Sep. 30, 2017 USD ($) Clients | Sep. 30, 2016 USD ($) Clients | Dec. 31, 2016 USD ($) Clients
Significant Accounting Policies [Line Items] |  |  |  |  |
Clients exceeding consolidated accounts receivable percentage | Clients | 0 |  | 0 |  | 0
Consolidated Accounts Receivable Percentage | 10.00% |  | 10.00% |  | 10.00%
Clients exceeding consolidated largest client revenue | Clients | 0 | 0 | 0 | 0 |
Consolidated Largest Client Revenue | 10.00% | 10.00% | 10.00% |  |
Option to purchase noncontrolling interest impairment charge | $ 0 | $ 0 | $ 0 | $ 0 |
Beginning Balance |  |  | 60,180,000 |  |
Redemptions | (337,000) | $ (520,000) | (9,650,000) |  |
Granted |  |  | 2,315,000 | 22,498,000 |
Ending Balance | 60,092,000 |  | 60,092,000 |  | $ 60,180,000
Redeemable Noncontrolling Interest [Member] |  |  |  |  |
Significant Accounting Policies [Line Items] |  |  |  |  |
Beginning Balance |  |  | 60,180,000 | $ 69,471,000 | 69,471,000
Redemptions |  |  | (816,000) |  | (1,708,000)
Granted |  |  | 0 |  | 2,274,000
Changes in redemption value |  |  | 299,000 |  | (9,604,000)
Currency Translation Adjustments |  |  | 429,000 |  | (253,000)
Ending Balance | $ 60,092,000 |  | $ 60,092,000 |  | $ 60,180,000

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- Definition The percentage of accounts receivable that the largest client did not exceed during the period. + References No definition available. + Details
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- Definition Adjustments to redeemable noncontrolling interest resulting from foreign currency translation adjustments. + References No definition available. + Details
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- Definition Change in noncontrolling interest during the period as a result of a change in the redemption value of redeemable noncontrolling interest. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 480 -SubTopic 10 -Section S99 -Paragraph 3A -Subparagraph 15 -URI http://asc.fasb.org/extlink&oid=65877616&loc=SL6540498-122764 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 480 -SubTopic 10 -Section S99 -Paragraph 3A -Subparagraph 16(c) -URI http://asc.fasb.org/extlink&oid=65877616&loc=SL6540498-122764 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 505 -SubTopic 10 -Section S99 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=27012166&loc=d3e187085-122770 Reference 4: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 480 -SubTopic 10 -Section S99 -Paragraph 3A -Subparagraph 14 -URI http://asc.fasb.org/extlink&oid=65877616&loc=SL6540498-122764 + Details
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