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v3.10.0.1

Fair Value Measurements - Hierarchy (Details) - USD ($) $ in Thousands | Dec. 31, 2017 | Dec. 31, 2016 | Sep. 30, 2016 | Jun. 30, 2016 | Mar. 31, 2016
--- | --- | --- | --- | --- | ---
Assets |  |  |  |  |
Cash and cash equivalents | $ 246,125 | $ 211,433 |  |  |
Marketable securities | 3,111 | 12,506 | $ 16,973 | $ 62,274 | $ 63,713
Marketable securities | 0 | 2,974 | $ 3,968 | $ 13,949 | $ 17,934
Total assets | 249,236 | 226,913 |  |  |
Liabilities |  |  |  |  |
Contingent consideration obligation |  | 2,833 |  |  |
Contingent interest derivative (3) | 193 |  |  |  |
Mandatorily redeemable financial instrument | 37,959 | 0 |  |  |
Total liabilities | 38,152 | 2,833 |  |  |
Temporary Equity |  |  |  |  |
Redeemable noncontrolling interests (5) | 25,280 | 25,280 |  |  |
Total temporary equity | 25,280 | 25,280 |  |  |
Level 1 |  |  |  |  |
Assets |  |  |  |  |
Cash and cash equivalents | 246,125 | 211,433 |  |  |
Marketable securities | 0 | 0 |  |  |
Marketable securities |  | 0 |  |  |
Total assets | 246,125 | 211,433 |  |  |
Liabilities |  |  |  |  |
Contingent consideration obligation |  | 0 |  |  |
Total liabilities | 0 | 0 |  |  |
Temporary Equity |  |  |  |  |
Redeemable noncontrolling interests (5) | 0 | 0 |  |  |
Total temporary equity | 0 | 0 |  |  |
Level 2 |  |  |  |  |
Assets |  |  |  |  |
Cash and cash equivalents | 0 | 0 |  |  |
Marketable securities | 3,111 | 12,506 |  |  |
Marketable securities |  | 2,974 |  |  |
Total assets | 3,111 | 15,480 |  |  |
Liabilities |  |  |  |  |
Contingent consideration obligation |  | 0 |  |  |
Total liabilities | 0 | 0 |  |  |
Temporary Equity |  |  |  |  |
Redeemable noncontrolling interests (5) | 0 | 0 |  |  |
Total temporary equity | 0 | 0 |  |  |
Level 3 |  |  |  |  |
Assets |  |  |  |  |
Cash and cash equivalents | 0 | 0 |  |  |
Marketable securities | 0 | 0 |  |  |
Marketable securities |  | 0 |  |  |
Total assets | 0 | 0 |  |  |
Liabilities |  |  |  |  |
Contingent consideration obligation |  | 2,833 |  |  |
Contingent interest derivative (3) | 193 |  |  |  |
Mandatorily redeemable financial instrument | 37,959 |  |  |  |
Total liabilities | 38,152 | 2,833 |  |  |
Temporary Equity |  |  |  |  |
Redeemable noncontrolling interests (5) | 25,280 | 25,280 |  |  |
Total temporary equity | $ 25,280 | $ 25,280 |  |  |

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