| Component: (Network and Table) | |
|---|---|
| Network | 41301 - Disclosure - Accounts Payable and Accrued Expenses (Details) (http://www.itg.com/role/DisclosureAccountsPayableAndAccruedExpensesDetails) |
| Table | (Implied) |
| Reporting Entity [Axis] | 0000920424 (http://www.sec.gov/CIK) |
| Accounts Payable and Accrued Expenses | Period [Axis] | ||
|---|---|---|---|
2016-12-31 | 2015-12-31 | 2014-12-31 | |
Accounts Payable and Accrued Expenses | |||
Accrued research payables | 45,826,000 | 46,274,000 | 56,700,000 |
Accrued compensation and benefits | |||
Accrued settlement costs | |||
Accrued rent | |||
Trade payables | |||
Deferred revenue | |||
Deferred compensation | |||
Accrued restructuring | 3,157,000 | 1,254,000 | |
Accrued transaction processing | |||
Other | |||
Total | 174,343,000 | 169,530,000 | |