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Fair Value Measurements Fair Value, Reconciliation of Level 3 - Assets (Details) - USD ($) $ in Thousands | 3 Months Ended | 9 Months Ended |  |  |  |
--- | --- | --- | --- | --- | --- | ---
Sep. 30, 2017 | Sep. 30, 2016 | Sep. 30, 2017 | Sep. 30, 2016 | Jun. 30, 2017 | Dec. 31, 2016 | Jun. 30, 2016 | Dec. 31, 2015
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward] |  |  |  |  |  |  |  |  |
Purchases of Convertible Debt |  | $ 0 | $ 0 | $ 1,612 | $ 0 |  |  |  |
Proceeds from Sale, Maturity and Collection of Investments |  |  |  | (16,561) | (1,685) |  |  |  |
Fair Value, Option, Changes in Fair Value, Gain (Loss) |  | (3,955) | (1,594) | (5,100) | (7,301) |  |  |  |
AFS Securities, Beginning Asset Value |  | 81,439 | 125,018 | 82,584 | 130,725 |  |  |  |
AFS Securities, Ending Asset Value |  | 77,484 | 123,424 | 77,484 | 123,424 |  |  |  |
Unrealized Gains (Losses) Still Held - Assets | [1] | (3,955) | (1,594) | (5,100) | (7,301) |  |  |  |
Fair Value, Measurement with Unobservable Inputs Reconciliations, Recurring Basis, Liability Value |  | 0 | 14,626 | 0 | 14,626 | $ 0 | $ 14,588 | $ 14,788 | $ 10,781
Payment of Contingent Consideration |  | 0 | 0 | (7,858) | 0 |  |  |  |
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Liability, Purchases, (Sales), Issuances, (Settlements) |  | 0 | 0 | (6,778) | (285) |  |  |  |
Gain from changes in fair value of contingent consideration | [2] | 0 | (162) | 48 | 4,130 |  |  |  |
Fair Value, Measurement with Unobservable Inputs, Unrealized Gain Loss | [1] | 0 | (162) | 0 | 4,004 |  |  |  |
Available-for-sale Investment Transfer to Cost Method Investment |  | 0 | (4,574) | 0 | (4,574) |  |  |  |
Convertible debt securities [Member] |  |  |  |  |  |  |  |  |
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward] |  |  |  |  |  |  |  |  |
Proceeds from Maturities, Prepayments and Calls of Available-for-sale Securities |  | 0 | (1,685) | (1,843) | (1,685) |  |  |  |
Fair Value, Measured on Recurring Basis, Gain (Loss) Included in Earnings | [3] | 218 | 477 | 1,812 | 714 |  |  |  |
AFS Securities, Beginning Asset Value |  | 10,868 | 10,573 | 10,038 | 10,116 |  |  |  |
AFS Debt Security, (losses) included in OCI |  | 146 | 566 | (387) | 786 |  |  |  |
AFS Securities, Ending Asset Value |  | 11,232 | 9,931 | 11,232 | 9,931 |  |  |  |
Unrealized Gains (Losses) Still Held - Assets | [1] | 364 | 1,043 | 1,180 | 1,500 |  |  |  |
Redeemable preferred shares [Member] |  |  |  |  |  |  |  |  |
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward] |  |  |  |  |  |  |  |  |
AFS Securities, Beginning Asset Value |  | 15,923 | 22,343 | 17,444 | 22,834 |  |  |  |
AFS Debt Security, (losses) included in OCI |  | (371) | (592) | (1,892) | (1,083) |  |  |  |
AFS Securities, Ending Asset Value |  | 15,552 | 17,177 | 15,552 | 17,177 |  |  |  |
Unrealized Gains (Losses) Still Held - Assets | [1] | $ (371) | (592) | $ (1,892) | $ (1,083) |  |  |  |
Monster LP [Member] |  |  |  |  |  |  |  |  |
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward] |  |  |  |  |  |  |  |  |
Fair Value, Option, Changes in Fair Value, Gain (Loss) |  |  | $ (1,594) |  |  |  |  |  |
[1] | Represents the unrealized losses or gains recorded in earnings and/or other comprehensive income (loss) during the period for assets and liabilities classified as Level 3 that are still held (or outstanding) at the end of the period.
[2] | Changes in the fair value of contingent consideration liabilities are classified within "Acquisition-related expense (benefit), net" on the condensed consolidated statements of operations.
[3] | Represents a gain at maturity of a previously impaired convertible debt security, accretion of interest income and changes in the fair value of an embedded derivative.

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- Definition Amount of realized and unrealized gain (loss) included in earnings, which have arisen from the use of significant unobservable inputs (level 3) to measure fair value of assets, liabilities, and financial instruments classified in shareholders' equity. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 820 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (c)(1) -URI http://asc.fasb.org/extlink&oid=66048111&loc=d3e19207-110258 + Details
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- Definition Amount of purchases, (sales), issuances and (settlements) of financial instrument classified as a liability measured using unobservable inputs that reflect the entity's own assumption about the assumptions market participants would use in pricing. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 820 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (c)(2) -URI http://asc.fasb.org/extlink&oid=66048111&loc=d3e19207-110258 + Details
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