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Derivatives - Fair Value of Derivative Contracts (Detail) - USD ($)
$ in Thousands

Sep. 30, 2018

Dec. 31, 2017

Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]

Derivative contracts, Assets

$ 94,744

$ 12,669

Derivative contracts, Liabilities

63,796

7,933

Notional Amounts

^[1]

17,323,348

17,669,642

Foreign Exchange Swaps [Member]

Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]

Derivative contracts, Assets

2,956

801

Derivative contracts, Liabilities

2,300

2,846

Notional Amounts

^[1]

499,536

407,600

Foreign Exchange/Commodities Options [Member]

Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]

Derivative contracts, Assets

1

4,416

Derivative contracts, Liabilities

48,833

130

Notional Amounts

^[1]

3,694,701

2,442,200

Interest Rate Swaps [Member]

Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]

Derivative contracts, Assets

242

Notional Amounts

^[1]

12,092

Equity Options [Member]

Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]

Derivative contracts, Liabilities

18

Notional Amounts

^[1]

961,000

Forwards [Member]

Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]

Derivative contracts, Assets

^[2]

85,464

4,262

Derivative contracts, Liabilities

^[2]

574

1,483

Notional Amounts

^[1],[2]

1,899,666

642,802

Rate Lock Commitments [Member]

Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]

Derivative contracts, Assets

6,219

2,923

Derivative contracts, Liabilities

12,089

2,390

Notional Amounts

^[1]

391,293

180,918

Futures [Member]

Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]

Derivative contracts, Assets

104

25

Derivative contracts, Liabilities

1,066

Notional Amounts

^[1]

$ 10,838,152

$ 13,023,030

[1]	Notional amounts represent the sum of gross long and short derivative contracts, an indication of the volume of the Company’s derivative activity and does not represent anticipated losses.
[2]	On June 28, 2018 and September 26, 2018 the Company entered into separate postpaid forward transactions with RBC related to the monetization of the Nasdaq shares the Company expects to receive as part of Company’s sale of its eSpeed business to Nasdaq. See Note 1—“Organization and Basis of Presentation” for additional information.

X

- Definition

Aggregate notional amount specified by the derivative(s). Expressed as an absolute value.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher SEC
-Name Regulation S-X (SX)
-Number 210
-Article 12
-Section 13
-Sentence Column B

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X

- Definition

Fair value as of the balance sheet date of derivative instrument not designated as hedging instrument and classified as an asset.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 815
-SubTopic 10
-Section 50
-Paragraph 4B
-Subparagraph (c)(2)
-URI http://asc.fasb.org/extlink&oid=109980867&loc=SL5624163-113959

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- Definition

Fair value as of the balance sheet date of derivative instrument not designated as hedging instrument and classified as a liability.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 815
-SubTopic 10
-Section 50
-Paragraph 4B
-Subparagraph (c)(2)
-URI http://asc.fasb.org/extlink&oid=109980867&loc=SL5624163-113959

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+ References

No definition available.

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