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Accounts Payable, Accrued Expenses and Other Liabilities - Components of Current Portion of Accounts Payable, Accrued Expenses and Other Liabilities (Detail) - USD ($) $ in Thousands | Jun. 30, 2019 | Dec. 31, 2018
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Accounts Payable Accrued Expenses And Other Liabilities Current [Abstract] |  |
Accounts payable and accrued expenses | $ 131,825 | $ 113,713
Outside broker payable | 63,233 | 59,918
Payroll taxes payable | 48,675 | 39,620
Derivative liability | 29,689 | 16,678
ROU liabilities | 22,816 |
Corporate and other taxes payable | 22,328 | 77,858
Contingent consideration | 11,518 | 4,452
Current portion of accounts payable, accrued expenses and other liabilities | $ 330,084 | $ 312,239

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- Definition Carrying value as of the balance sheet date of obligations incurred and payable for statutory payroll taxes incurred through that date and withheld from employees pertaining to services received from them, including entity's matching share of the employees FICA taxes and contributions to the state and federal unemployment insurance programs. Used to reflect the current portion of the liabilities (due within one year or within the normal operating cycle if longer). + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02.20) -URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 10 -Section 45 -Paragraph 8 -URI http://asc.fasb.org/extlink&oid=82887183&loc=d3e6935-107765 + Details
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