Fair Value Disclosures (Quantitative Information About Significant Unobservable Inputs Used In Level 3 Fair Value Measurements) (Details) $ in Thousands	6 Months Ended	11 Months Ended
	May 31, 2019 USD ($)	Nov. 30, 2018 USD ($)	May 31, 2019	May 31, 2019 $ / shares	May 31, 2019 € / Bond	May 31, 2019 $ / Bond	Nov. 30, 2018	Nov. 30, 2018 $ / shares	Nov. 30, 2018 € / Bond	Nov. 30, 2018 $ / Bond
Fair Value Assets Measured On Recurring Basis Unobservable Input Reconciliation [Line Items]
Securities purchased under agreements to resell | $	$ 4,027,332	$ 2,785,758
Derivative assets | $	356,499	166,775
Derivative liability | $	554,243	1,127,653
Long-term debt, fair value | $	819,509	686,170
Level 3
Fair Value Assets Measured On Recurring Basis Unobservable Input Reconciliation [Line Items]
Derivative assets | $	8,414	5,922
Derivative liability | $	55,863	27,536
Long-term debt, fair value | $	236,562	200,745
Level 3 | Price | Minimum
Fair Value Assets Measured On Recurring Basis Unobservable Input Reconciliation [Line Items]
Long-term debt, measurement input					78	83			68	78
Level 3 | Price | Maximum
Fair Value Assets Measured On Recurring Basis Unobservable Input Reconciliation [Line Items]
Long-term debt, measurement input					107	100			110	94
Level 3 | Price | Weighted Average
Fair Value Assets Measured On Recurring Basis Unobservable Input Reconciliation [Line Items]
Long-term debt, measurement input					94	92			96	86
Level 3 | Corporate equity securities
Fair Value Assets Measured On Recurring Basis Unobservable Input Reconciliation [Line Items]
Trading assets, fair value | $	53,000
Level 3 | Non-exchange-traded securities
Fair Value Assets Measured On Recurring Basis Unobservable Input Reconciliation [Line Items]
Trading assets, fair value | $		43,644
Level 3 | Non-exchange-traded securities | Price | Minimum
Fair Value Assets Measured On Recurring Basis Unobservable Input Reconciliation [Line Items]
Trading assets, measurement input | $ / shares				3				1
Level 3 | Non-exchange-traded securities | Price | Maximum
Fair Value Assets Measured On Recurring Basis Unobservable Input Reconciliation [Line Items]
Trading assets, measurement input | $ / shares				85				75
Level 3 | Non-exchange-traded securities | Price | Weighted Average
Fair Value Assets Measured On Recurring Basis Unobservable Input Reconciliation [Line Items]
Trading assets, measurement input | $ / shares				55				12
Level 3 | Non-exchange-traded securities | Transaction level
Fair Value Assets Measured On Recurring Basis Unobservable Input Reconciliation [Line Items]
Trading assets, measurement input | $ / shares								47
Level 3 | Non-exchange-traded securities | Underlying stock price | Minimum
Fair Value Assets Measured On Recurring Basis Unobservable Input Reconciliation [Line Items]
Trading assets, measurement input | $ / shares				3
Level 3 | Non-exchange-traded securities | Underlying stock price | Maximum
Fair Value Assets Measured On Recurring Basis Unobservable Input Reconciliation [Line Items]
Trading assets, measurement input | $ / shares				13
Level 3 | Non-exchange-traded securities | Underlying stock price | Weighted Average
Fair Value Assets Measured On Recurring Basis Unobservable Input Reconciliation [Line Items]
Trading assets, measurement input | $ / shares				10
Level 3 | Corporate debt securities
Fair Value Assets Measured On Recurring Basis Unobservable Input Reconciliation [Line Items]
Trading assets, fair value | $	8,346	9,484
Level 3 | Corporate debt securities | Price | Minimum
Fair Value Assets Measured On Recurring Basis Unobservable Input Reconciliation [Line Items]
Trading assets, measurement input						8
Level 3 | Corporate debt securities | Price | Maximum
Fair Value Assets Measured On Recurring Basis Unobservable Input Reconciliation [Line Items]
Trading assets, measurement input						88
Level 3 | Corporate debt securities | Price | Weighted Average
Fair Value Assets Measured On Recurring Basis Unobservable Input Reconciliation [Line Items]
Trading assets, measurement input						57
Level 3 | Corporate debt securities | Transaction level
Fair Value Assets Measured On Recurring Basis Unobservable Input Reconciliation [Line Items]
Trading assets, measurement input							80
Level 3 | Corporate debt securities | Discount rate/yield
Fair Value Assets Measured On Recurring Basis Unobservable Input Reconciliation [Line Items]
Trading assets, measurement input			0.32
Level 3 | Corporate debt securities | Estimated recovery percentage
Fair Value Assets Measured On Recurring Basis Unobservable Input Reconciliation [Line Items]
Trading assets, measurement input			0.49				0.46
Level 3 | CDOs and CLOs
Fair Value Assets Measured On Recurring Basis Unobservable Input Reconciliation [Line Items]
Trading assets, fair value | $	25,912	36,105
Level 3 | CDOs and CLOs | Discount rate/yield | Discounted cash flows | Minimum
Fair Value Assets Measured On Recurring Basis Unobservable Input Reconciliation [Line Items]
Trading assets, measurement input			0.11				0.11
Level 3 | CDOs and CLOs | Discount rate/yield | Discounted cash flows | Maximum
Fair Value Assets Measured On Recurring Basis Unobservable Input Reconciliation [Line Items]
Trading assets, measurement input			0.17				0.16
Level 3 | CDOs and CLOs | Discount rate/yield | Discounted cash flows | Weighted Average
Fair Value Assets Measured On Recurring Basis Unobservable Input Reconciliation [Line Items]
Trading assets, measurement input			0.13				0.14
Level 3 | CDOs and CLOs | Estimated recovery percentage | Scenario analysis | Minimum
Fair Value Assets Measured On Recurring Basis Unobservable Input Reconciliation [Line Items]
Trading assets, measurement input			0.02				0.02
Level 3 | CDOs and CLOs | Estimated recovery percentage | Scenario analysis | Maximum
Fair Value Assets Measured On Recurring Basis Unobservable Input Reconciliation [Line Items]
Trading assets, measurement input			0.38				0.41
Level 3 | CDOs and CLOs | Estimated recovery percentage | Scenario analysis | Weighted Average
Fair Value Assets Measured On Recurring Basis Unobservable Input Reconciliation [Line Items]
Trading assets, measurement input			0.26				0.23
Level 3 | CDOs and CLOs | Constant prepayment rate | Discounted cash flows | Minimum
Fair Value Assets Measured On Recurring Basis Unobservable Input Reconciliation [Line Items]
Trading assets, measurement input			0.10				0.10
Level 3 | CDOs and CLOs | Constant prepayment rate | Discounted cash flows | Maximum
Fair Value Assets Measured On Recurring Basis Unobservable Input Reconciliation [Line Items]
Trading assets, measurement input			0.20				0.20
Level 3 | CDOs and CLOs | Constant prepayment rate | Discounted cash flows | Weighted Average
Fair Value Assets Measured On Recurring Basis Unobservable Input Reconciliation [Line Items]
Trading assets, measurement input			0.16				0.18
Level 3 | CDOs and CLOs | Constant default rate | Discounted cash flows | Minimum
Fair Value Assets Measured On Recurring Basis Unobservable Input Reconciliation [Line Items]
Trading assets, measurement input			0.01				0.01
Level 3 | CDOs and CLOs | Constant default rate | Discounted cash flows | Maximum
Fair Value Assets Measured On Recurring Basis Unobservable Input Reconciliation [Line Items]
Trading assets, measurement input			0.02				0.02
Level 3 | CDOs and CLOs | Constant default rate | Discounted cash flows | Weighted Average
Fair Value Assets Measured On Recurring Basis Unobservable Input Reconciliation [Line Items]
Trading assets, measurement input			0.02				0.02
Level 3 | CDOs and CLOs | Loss severity | Discounted cash flows | Minimum
Fair Value Assets Measured On Recurring Basis Unobservable Input Reconciliation [Line Items]
Trading assets, measurement input			0.25				0.25
Level 3 | CDOs and CLOs | Loss severity | Discounted cash flows | Maximum
Fair Value Assets Measured On Recurring Basis Unobservable Input Reconciliation [Line Items]
Trading assets, measurement input			0.30				0.30
Level 3 | CDOs and CLOs | Loss severity | Discounted cash flows | Weighted Average
Fair Value Assets Measured On Recurring Basis Unobservable Input Reconciliation [Line Items]
Trading assets, measurement input			0.27				0.26
Level 3 | Residential mortgage-backed securities
Fair Value Assets Measured On Recurring Basis Unobservable Input Reconciliation [Line Items]
Trading assets, fair value | $	$ 17,266	$ 19,603
Level 3 | Residential mortgage-backed securities | Price | Market approach
Fair Value Assets Measured On Recurring Basis Unobservable Input Reconciliation [Line Items]
Trading assets, measurement input										100
Level 3 | Residential mortgage-backed securities | Discount rate/yield
Fair Value Assets Measured On Recurring Basis Unobservable Input Reconciliation [Line Items]
Trading assets, measurement input			0.03
Level 3 | Residential mortgage-backed securities | Discount rate/yield | Discounted cash flows
Fair Value Assets Measured On Recurring Basis Unobservable Input Reconciliation [Line Items]
Trading assets, measurement input							0.03
Level 3 | Residential mortgage-backed securities | Loss severity | Discounted cash flows
Fair Value Assets Measured On Recurring Basis Unobservable Input Reconciliation [Line Items]
Trading assets, measurement input							0
Level 3 | Residential mortgage-backed securities | Cumulative loss rate
Fair Value Assets Measured On Recurring Basis Unobservable Input Reconciliation [Line Items]
Trading assets, measurement input			0.02
Level 3 | Residential mortgage-backed securities | Cumulative loss rate | Discounted cash flows
Fair Value Assets Measured On Recurring Basis Unobservable Input Reconciliation [Line Items]
Trading assets, measurement input							0.04
Level 3 | Residential mortgage-backed securities | Duration (years)
Fair Value Assets Measured On Recurring Basis Unobservable Input Reconciliation [Line Items]
Trading assets, measurement input, term	7 years
Level 3 | Residential mortgage-backed securities | Duration (years) | Discounted cash flows
Fair Value Assets Measured On Recurring Basis Unobservable Input Reconciliation [Line Items]
Trading assets, measurement input, term		13 years
Level 3 | Commercial mortgage-backed securities
Fair Value Assets Measured On Recurring Basis Unobservable Input Reconciliation [Line Items]
Trading assets, fair value | $	$ 12,530	$ 9,444
Level 3 | Commercial mortgage-backed securities | Price | Scenario analysis
Fair Value Assets Measured On Recurring Basis Unobservable Input Reconciliation [Line Items]
Trading assets, measurement input										49
Level 3 | Commercial mortgage-backed securities | Price | Scenario analysis | Minimum
Fair Value Assets Measured On Recurring Basis Unobservable Input Reconciliation [Line Items]
Trading assets, measurement input						39
Level 3 | Commercial mortgage-backed securities | Price | Scenario analysis | Maximum
Fair Value Assets Measured On Recurring Basis Unobservable Input Reconciliation [Line Items]
Trading assets, measurement input						60
Level 3 | Commercial mortgage-backed securities | Price | Scenario analysis | Weighted Average
Fair Value Assets Measured On Recurring Basis Unobservable Input Reconciliation [Line Items]
Trading assets, measurement input						50
Level 3 | Commercial mortgage-backed securities | Discount rate/yield | Discounted cash flows | Minimum
Fair Value Assets Measured On Recurring Basis Unobservable Input Reconciliation [Line Items]
Trading assets, measurement input			0.03				0.02
Level 3 | Commercial mortgage-backed securities | Discount rate/yield | Discounted cash flows | Maximum
Fair Value Assets Measured On Recurring Basis Unobservable Input Reconciliation [Line Items]
Trading assets, measurement input			0.28				0.15
Level 3 | Commercial mortgage-backed securities | Discount rate/yield | Discounted cash flows | Weighted Average
Fair Value Assets Measured On Recurring Basis Unobservable Input Reconciliation [Line Items]
Trading assets, measurement input			0.19				0.06
Level 3 | Commercial mortgage-backed securities | Estimated recovery percentage | Scenario analysis
Fair Value Assets Measured On Recurring Basis Unobservable Input Reconciliation [Line Items]
Trading assets, measurement input							0.26
Level 3 | Commercial mortgage-backed securities | Estimated recovery percentage | Scenario analysis | Minimum
Fair Value Assets Measured On Recurring Basis Unobservable Input Reconciliation [Line Items]
Trading assets, measurement input			0.12
Level 3 | Commercial mortgage-backed securities | Estimated recovery percentage | Scenario analysis | Maximum
Fair Value Assets Measured On Recurring Basis Unobservable Input Reconciliation [Line Items]
Trading assets, measurement input			0.83
Level 3 | Commercial mortgage-backed securities | Estimated recovery percentage | Scenario analysis | Weighted Average
Fair Value Assets Measured On Recurring Basis Unobservable Input Reconciliation [Line Items]
Trading assets, measurement input			0.47
Level 3 | Commercial mortgage-backed securities | Loss severity | Discounted cash flows
Fair Value Assets Measured On Recurring Basis Unobservable Input Reconciliation [Line Items]
Trading assets, measurement input							0.64
Level 3 | Commercial mortgage-backed securities | Cumulative loss rate | Discounted cash flows | Minimum
Fair Value Assets Measured On Recurring Basis Unobservable Input Reconciliation [Line Items]
Trading assets, measurement input			0.08				0.08
Level 3 | Commercial mortgage-backed securities | Cumulative loss rate | Discounted cash flows | Maximum
Fair Value Assets Measured On Recurring Basis Unobservable Input Reconciliation [Line Items]
Trading assets, measurement input			0.86				0.85
Level 3 | Commercial mortgage-backed securities | Cumulative loss rate | Discounted cash flows | Weighted Average
Fair Value Assets Measured On Recurring Basis Unobservable Input Reconciliation [Line Items]
Trading assets, measurement input			0.32				0.45
Level 3 | Commercial mortgage-backed securities | Duration (years) | Discounted cash flows | Minimum
Fair Value Assets Measured On Recurring Basis Unobservable Input Reconciliation [Line Items]
Trading assets, measurement input, term	0 years	1 year
Level 3 | Commercial mortgage-backed securities | Duration (years) | Discounted cash flows | Maximum
Fair Value Assets Measured On Recurring Basis Unobservable Input Reconciliation [Line Items]
Trading assets, measurement input, term	1 year	3 years
Level 3 | Commercial mortgage-backed securities | Duration (years) | Discounted cash flows | Weighted Average
Fair Value Assets Measured On Recurring Basis Unobservable Input Reconciliation [Line Items]
Trading assets, measurement input, term	1 year	1 year
Level 3 | Other asset-backed securities
Fair Value Assets Measured On Recurring Basis Unobservable Input Reconciliation [Line Items]
Trading assets, fair value | $	$ 43,185	$ 53,175
Level 3 | Other asset-backed securities | Price | Market approach
Fair Value Assets Measured On Recurring Basis Unobservable Input Reconciliation [Line Items]
Trading assets, measurement input						100				100
Level 3 | Other asset-backed securities | Discount rate/yield | Discounted cash flows | Minimum
Fair Value Assets Measured On Recurring Basis Unobservable Input Reconciliation [Line Items]
Trading assets, measurement input			0.05				0.06
Level 3 | Other asset-backed securities | Discount rate/yield | Discounted cash flows | Maximum
Fair Value Assets Measured On Recurring Basis Unobservable Input Reconciliation [Line Items]
Trading assets, measurement input			0.12				0.12
Level 3 | Other asset-backed securities | Discount rate/yield | Discounted cash flows | Weighted Average
Fair Value Assets Measured On Recurring Basis Unobservable Input Reconciliation [Line Items]
Trading assets, measurement input			0.12				0.08
Level 3 | Other asset-backed securities | Cumulative loss rate | Discounted cash flows | Minimum
Fair Value Assets Measured On Recurring Basis Unobservable Input Reconciliation [Line Items]
Trading assets, measurement input			0.11				0.12
Level 3 | Other asset-backed securities | Cumulative loss rate | Discounted cash flows | Maximum
Fair Value Assets Measured On Recurring Basis Unobservable Input Reconciliation [Line Items]
Trading assets, measurement input			0.31				0.30
Level 3 | Other asset-backed securities | Cumulative loss rate | Discounted cash flows | Weighted Average
Fair Value Assets Measured On Recurring Basis Unobservable Input Reconciliation [Line Items]
Trading assets, measurement input			0.20				0.22
Level 3 | Other asset-backed securities | Duration (years) | Discounted cash flows | Minimum
Fair Value Assets Measured On Recurring Basis Unobservable Input Reconciliation [Line Items]
Trading assets, measurement input, term	1 year	1 year
Level 3 | Other asset-backed securities | Duration (years) | Discounted cash flows | Maximum
Fair Value Assets Measured On Recurring Basis Unobservable Input Reconciliation [Line Items]
Trading assets, measurement input, term	2 years	2 years
Level 3 | Other asset-backed securities | Duration (years) | Discounted cash flows | Weighted Average
Fair Value Assets Measured On Recurring Basis Unobservable Input Reconciliation [Line Items]
Trading assets, measurement input, term	1 year	1 year
Level 3 | Loans and other receivables
Fair Value Assets Measured On Recurring Basis Unobservable Input Reconciliation [Line Items]
Trading assets, fair value | $	$ 98,484	$ 46,078
Level 3 | Loans and other receivables | Price | Market approach | Minimum
Fair Value Assets Measured On Recurring Basis Unobservable Input Reconciliation [Line Items]
Trading assets, measurement input						50				50
Level 3 | Loans and other receivables | Price | Market approach | Maximum
Fair Value Assets Measured On Recurring Basis Unobservable Input Reconciliation [Line Items]
Trading assets, measurement input						101				100
Level 3 | Loans and other receivables | Price | Market approach | Weighted Average
Fair Value Assets Measured On Recurring Basis Unobservable Input Reconciliation [Line Items]
Trading assets, measurement input						91				96
Level 3 | Loans and other receivables | Estimated recovery percentage | Scenario analysis | Minimum
Fair Value Assets Measured On Recurring Basis Unobservable Input Reconciliation [Line Items]
Trading assets, measurement input			0.13				0.13
Level 3 | Loans and other receivables | Estimated recovery percentage | Scenario analysis | Maximum
Fair Value Assets Measured On Recurring Basis Unobservable Input Reconciliation [Line Items]
Trading assets, measurement input			1.17				1.17
Level 3 | Loans and other receivables | Estimated recovery percentage | Scenario analysis | Weighted Average
Fair Value Assets Measured On Recurring Basis Unobservable Input Reconciliation [Line Items]
Trading assets, measurement input			1.05				1.05
Level 3 | Loans and other receivables | Estimated recovery percentage | Market approach
Fair Value Assets Measured On Recurring Basis Unobservable Input Reconciliation [Line Items]
Trading assets, measurement input			0.01
Level 3 | Loans and other receivables | Comparable price | Market approach
Fair Value Assets Measured On Recurring Basis Unobservable Input Reconciliation [Line Items]
Trading assets, measurement input						33
Level 3 | Derivatives
Fair Value Assets Measured On Recurring Basis Unobservable Input Reconciliation [Line Items]
Derivative assets | $	8,414	4,602
Derivative liability | $	55,863	27,536
Level 3 | Derivatives | Price | Interest rate swaps | Market approach
Fair Value Assets Measured On Recurring Basis Unobservable Input Reconciliation [Line Items]
Derivative liability, measurement input										20
Level 3 | Derivatives | Price | Total return swaps
Fair Value Assets Measured On Recurring Basis Unobservable Input Reconciliation [Line Items]
Derivative asset, measurement input										97
Level 3 | Derivatives | Price | Total return swaps | Market approach
Fair Value Assets Measured On Recurring Basis Unobservable Input Reconciliation [Line Items]
Derivative liability, measurement input										97
Level 3 | Derivatives | Volatility | Equity options | Volatility benchmarking | Minimum
Fair Value Assets Measured On Recurring Basis Unobservable Input Reconciliation [Line Items]
Derivative liability, measurement input			0.03				0.39
Level 3 | Derivatives | Volatility | Equity options | Volatility benchmarking | Maximum
Fair Value Assets Measured On Recurring Basis Unobservable Input Reconciliation [Line Items]
Derivative liability, measurement input			0.63				0.62
Level 3 | Derivatives | Volatility | Equity options | Volatility benchmarking | Weighted Average
Fair Value Assets Measured On Recurring Basis Unobservable Input Reconciliation [Line Items]
Derivative liability, measurement input			0.46				0.50
Level 3 | Derivatives | Default probability | Equity options | Option model/default rate
Fair Value Assets Measured On Recurring Basis Unobservable Input Reconciliation [Line Items]
Derivative liability, measurement input							0
Level 3 | Derivatives | Basis points upfront | Interest rate swaps | Minimum
Fair Value Assets Measured On Recurring Basis Unobservable Input Reconciliation [Line Items]
Derivative asset, measurement input						0
Level 3 | Derivatives | Basis points upfront | Interest rate swaps | Maximum
Fair Value Assets Measured On Recurring Basis Unobservable Input Reconciliation [Line Items]
Derivative asset, measurement input						12
Level 3 | Derivatives | Basis points upfront | Interest rate swaps | Weighted Average
Fair Value Assets Measured On Recurring Basis Unobservable Input Reconciliation [Line Items]
Derivative asset, measurement input						5
Level 3 | Derivatives | Basis points upfront | Interest rate swaps | Market approach | Minimum
Fair Value Assets Measured On Recurring Basis Unobservable Input Reconciliation [Line Items]
Derivative liability, measurement input			0
Level 3 | Derivatives | Basis points upfront | Interest rate swaps | Market approach | Maximum
Fair Value Assets Measured On Recurring Basis Unobservable Input Reconciliation [Line Items]
Derivative liability, measurement input			21
Level 3 | Derivatives | Basis points upfront | Interest rate swaps | Market approach | Weighted Average
Fair Value Assets Measured On Recurring Basis Unobservable Input Reconciliation [Line Items]
Derivative liability, measurement input			12
Level 3 | Private equity securities
Fair Value Assets Measured On Recurring Basis Unobservable Input Reconciliation [Line Items]
Trading assets, fair value | $	$ 341,690	$ 368,231
Level 3 | Private equity securities | Price | Market approach | Minimum
Fair Value Assets Measured On Recurring Basis Unobservable Input Reconciliation [Line Items]
Trading assets, measurement input | $ / shares				169				3
Level 3 | Private equity securities | Price | Market approach | Maximum
Fair Value Assets Measured On Recurring Basis Unobservable Input Reconciliation [Line Items]
Trading assets, measurement input | $ / shares				250				250
Level 3 | Private equity securities | Price | Market approach | Weighted Average
Fair Value Assets Measured On Recurring Basis Unobservable Input Reconciliation [Line Items]
Trading assets, measurement input | $ / shares				229				108
Level 3 | Private equity securities | Transaction level | Market approach
Fair Value Assets Measured On Recurring Basis Unobservable Input Reconciliation [Line Items]
Trading assets, measurement input | $ / shares								169
Level 3 | Private equity securities | Discount rate/yield | Scenario analysis
Fair Value Assets Measured On Recurring Basis Unobservable Input Reconciliation [Line Items]
Trading assets, measurement input			0.20				0.20
Level 3 | Private equity securities | Duration (years) | Contingent claims analysis
Fair Value Assets Measured On Recurring Basis Unobservable Input Reconciliation [Line Items]
Trading assets, measurement input, term	6 months	4 years
Level 3 | Private equity securities | Revenue growth | Scenario analysis
Fair Value Assets Measured On Recurring Basis Unobservable Input Reconciliation [Line Items]
Trading assets, measurement input			0				0
Level 3 | Private equity securities | Volatility | Contingent claims analysis | Minimum
Fair Value Assets Measured On Recurring Basis Unobservable Input Reconciliation [Line Items]
Trading assets, measurement input			0.25				0.25
Level 3 | Private equity securities | Volatility | Contingent claims analysis | Maximum
Fair Value Assets Measured On Recurring Basis Unobservable Input Reconciliation [Line Items]
Trading assets, measurement input			0.35				0.35
Level 3 | Private equity securities | Volatility | Contingent claims analysis | Weighted Average
Fair Value Assets Measured On Recurring Basis Unobservable Input Reconciliation [Line Items]
Trading assets, measurement input			0.30				0.30
Level 3 | FXCM term loan
Fair Value Assets Measured On Recurring Basis Unobservable Input Reconciliation [Line Items]
Trading assets, fair value | $	$ 56,600	$ 73,150
Level 3 | FXCM term loan | Term based on the pay off (years) | Minimum
Fair Value Assets Measured On Recurring Basis Unobservable Input Reconciliation [Line Items]
Trading assets, measurement input, term	0 months	0 months
Level 3 | FXCM term loan | Term based on the pay off (years) | Maximum
Fair Value Assets Measured On Recurring Basis Unobservable Input Reconciliation [Line Items]
Trading assets, measurement input, term	1 year 8 months	4 months
Level 3 | FXCM term loan | Term based on the pay off (years) | Weighted Average
Fair Value Assets Measured On Recurring Basis Unobservable Input Reconciliation [Line Items]
Trading assets, measurement input, term	1 year 8 months 12 days	9 days
Level 3 | Securities purchased under agreements to resell
Fair Value Assets Measured On Recurring Basis Unobservable Input Reconciliation [Line Items]
Securities purchased under agreements to resell | $	$ 25,000
Level 3 | Securities purchased under agreements to resell | Duration (years)
Fair Value Assets Measured On Recurring Basis Unobservable Input Reconciliation [Line Items]
Securities purchased under agreements to resell, measurement input, term	2 years
Level 3 | Securities purchased under agreements to resell | Spread to 6 month LIBOR
Fair Value Assets Measured On Recurring Basis Unobservable Input Reconciliation [Line Items]
Securities purchased under agreements to resell, measurement input			500
Level 3 | Loans
Fair Value Assets Measured On Recurring Basis Unobservable Input Reconciliation [Line Items]
Debt instrument, fair value | $	$ 9,428	$ 6,376
Level 3 | Loans | Price | Minimum
Fair Value Assets Measured On Recurring Basis Unobservable Input Reconciliation [Line Items]
Debt instrument, measurement input						50				50
Level 3 | Loans | Price | Maximum
Fair Value Assets Measured On Recurring Basis Unobservable Input Reconciliation [Line Items]
Debt instrument, measurement input						80				101
Level 3 | Loans | Price | Weighted Average
Fair Value Assets Measured On Recurring Basis Unobservable Input Reconciliation [Line Items]
Debt instrument, measurement input						66				74