Recent Accounting Pronouncements (Detail)	9 Months Ended
	Sep. 30, 2015
Accounting Standards Update 2015-05
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Standard	ASU 2015-05, Customer's Accounting for Fees Paid in a Cloud Computing Arrangement
Description	This update clarifies that customers should determine whether a cloud computing arrangement includes the license of software by applying the same guidance cloud service providers use. The guidance also eliminates the current requirement that customers analogize to the leasing standard when determining the asset acquired in a software licensing arrangement.
Date of Adoption	January 1, 2016 (early adoption permitted)
Effect on the financial statements or other significant matters	No
Accounting Standards Update 2015-03
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Standard	ASU 2015-03, Interest - Imputation of Interest (Subtopic 835-30) Simplifying the Presentation of Debt Issuance Costs
Description	This ASU requires that debt issue costs are presented in the balance sheet as a direct deduction from the carrying amount of that debt liability. The recognition and measurement of debt issue costs are not affected.
Date of Adoption	January 1, 2016 (early adoption permitted)
Effect on the financial statements or other significant matters	Yes
Accounting Standards Update 2015-02
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Standard	ASU 2015-02, Consolidation (Topic 810) Amendments to the Consolidation Analysis
Description	This update affects the following areas of the consolidation analysis: limited partnerships and similar entities, evaluation of fees paid to a decision maker or service provider as a variable interest and in determination of the primary beneficiary, effect of related parties on the primary beneficiary determination and for certain investment funds. This update eliminates from GAAP the concept of extraordinary items.
Date of Adoption	January 1, 2016 (early adoption permitted)
Effect on the financial statements or other significant matters	No
Accounting Standards Update 2015-01
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Standard	ASU 2015-01, Income Statement - Extraordinary and Unusual Items (Subtopic 225-20)
Description	This update eliminates from GAAP the concept of extraordinary items.
Date of Adoption	January 1, 2016 (early adoption permitted)
Effect on the financial statements or other significant matters	No
Accounting Standards Update 2015-16
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Standard	ASU 2015-16 Business Combinations (Topic 805) Simplifying the Accounting Measurement-Period Adjustments
Description	This amendment removes the requirement to present adjustments to provisional amounts retrospectively. The update requires that an acquirer record, in the same period's financial statements, the effect on earnings of changes in depreciation, amortization, or other income effects, if any, as a result of the change to provisional amounts
Date of Adoption	January 1, 2016 (early adoption permitted)
Effect on the financial statements or other significant matters	No
Accounting Standards Update 2014-15
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Standard	ASU 2014-15, Presentation of Financial Statements - Going Concern (Subtopic 05-04) Disclosure of Uncertainties about an Enti ty's Ability to Continue as a Going Concern
Description	This ASU requires management to evaluate whether there are conditions or events, considered in the aggregate, that raise substantial doubt about the Company's ability to continue as a going concern within one year after the date the financial statements are issued.
Date of Adoption	January 1, 2017 (early adoption permitted)
Effect on the financial statements or other significant matters	No
Accounting Standards Update 2014-09
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Standard	ASU 2014-09, Revenue from Contracts with Customers
Description	This guidance applies to contracts with customers to transfer goods or services and contracts to transfer nonfinancial assets unless those contracts are within the scope of other standards (for example, lease transactions).
Date of Adoption	January 1, 2018
Effect on the financial statements or other significant matters	No
Accounting Standards Update 2014-17
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Standard	ASU 2014-17 Business Combinations (Topic 805): Pushdown Accounting
Description	This amendment provides an acquired entity with the option to apply push down accounting in its separate financial statements upon occurrence of an event in which an acquirer obtains control of the acquired entity.
Date of Adoption	November 18, 2014
Effect on the financial statements or other significant matters	No
Accounting Standards Update 2014-13
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Standard	ASU 2014-13, Consolidation (Topic 810) Measuring the Financial Assets and the Financial Liabilities of a Consolidated Collateralized Financing Entity.
Description	This Update provides a practical expedient to measure the fair value of the financial assets and financial liabilities of a consolidated collateralized financing entity, which the reporting entity has elected to or is required to measure on a fair value basis.
Date of Adoption	January 1, 2015 (early adoption permitted)
Effect on the financial statements or other significant matters	No
Accounting Standards Update 2014-11
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Standard	ASU 2014-11, Repurchase-to-Maturity Transactions, Repurchase Financings, and Disclosure.
Description	This update makes limited amendments to the guidance in ASC 860 on accounting for certain repurchase agreements.
Date of Adoption	January 1, 2015
Effect on the financial statements or other significant matters	Yes
Accounting Standards Update 2014-08
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Standard	ASU 2014-08, Presentation of Financial Statements (Topic 205) and Property, Plant and Equipment (Topic 360) Reporting Discontinued Operations and Disclosures of Disposals of Components of an Entity
Description	This ASU raises the threshold for a disposal to be treated as discontinued operations.
Date of Adoption	April 1, 2015
Effect on the financial statements or other significant matters	No
Accounting Standards Update 2014-04
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Standard	ASU 2014-04 Receivables–Troubled Debt Restructurings by Creditors, Reclassification of Residential Real Estate Collateralized Consumer Mortgage Loans upon Foreclosure
Description	This update clarifies that an in substance repossession or foreclosure has occurred, and a creditor is considered to have received physical possession of residential real estate property collateralizing a consumer mortgage loan, when the creditor obtains legal title to the property upon completion of a foreclosure or the borrower conveys all interest in the property to the creditor through a deed in lieu of foreclosure or similar arrangement
Date of Adoption	January 1, 2015
Effect on the financial statements or other significant matters	No
Accounting Standards Update 2013-02
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Standard	ASU 2013-02, Comprehensive Income: Reporting of Amounts Reclassified Out of Accumulated Other Comprehensive Income
Description	This update requires the provision of information about the amounts reclassified out of accumulated other comprehensive income by component. In addition, it requires presentation of significant amounts reclassified out of accumulated other comprehensive income by the respective line items of net income but only if the amount reclassified is required under GAAP to be reclassified to net income in its entirety in the same reporting period
Date of Adoption	January 1, 2014
Effect on the financial statements or other significant matters	No
Accounting Standards Update 2011-11
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Standard	ASU 2011-11, Balance Sheet: Disclosures about Offsetting Assets and Liabilities
Description	Under this update, the Company is required to disclose both gross and net information about both instruments and transactions eligible for offset in the Company's Consolidated Statements of Financial Condition and transactions subject to an agreement similar to a master netting arrangement. The scope includes derivatives, sale and repurchase agreements and reverse sale and repurchase agreements and securities borrowing and securities lending arrangements.
Date of Adoption	January 1, 2014
Effect on the financial statements or other significant matters	No
Accounting Standards Update 2015-10 [Member]
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Standard	ASU 2015-10, Technical Corrections and Improvements
Description	This perpetual project updates the Codification for technical corrections and improvements.
Date of Adoption	January 1, 2016 (early adoption permitted), for amendments subject to transition guidance
Effect on the financial statements or other significant matters	No
Accounting Standards Update 2015-07 [Member]
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Standard	ASU 2015-07, Fair Value Measurement (Topic 820): Disclosures for Investments in Certain Entities That Calculate Net Asset Value per Share (or Its Equivalent)
Description	This update removes the requirement to categorize within the fair value hierarchy all investments for which fair value is measured using the net asset value per share practical expedient and also removes certain disclosure requirements for these investments.
Date of Adoption	January 1, 2016 (early adoption permitted)
Effect on the financial statements or other significant matters	No
Accounting Standards Update 2015-08 [Member]
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Standard	ASU 2015-08, Business Combinations Topic 805 Pushdown Accounting Amendments to SEC Paragraphs Pursuant to Staff Accounting Bulletin No. 115
Description	This update amends the codification for SEC Staff Bulletin No. 115
Date of Adoption	November 18, 2014
Effect on the financial statements or other significant matters	No
Accounting Standards Update 2014-16
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Standard	ASU 2014-16, Derivatives and Hedging (Topic 815) Determining Whether the Host Contract in a Hybrid Financial Instrument Issued in the Form of a Share is More Akin to Debt or Equity
Description	This ASU provides additional guidance for evaluating whether conversion rights, redemption rights, voting rights, liquidation rights and dividend payment preferences and other features embedded in a share, including preferred stock, contain embedded derivatives requiring bifurcation. The update requires that an entity determine the nature of the host contract by considering all stated and implied terms and features in a hybrid instrument.
Date of Adoption	January 1, 2016 (early adoption permitted)
Effect on the financial statements or other significant matters	No
Accounting Standards Update 2015-15
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Standard	ASU 2015-15, Interest - Imputation of Interest (Subtopic 835-30) Simplifying the Presentation and Subsequent Measurement of Debt Issuance Costs Associated with Line-of-Credit Arrangements - Amendments to SEC Paragraphs Pursuant to Staff Announcement at June 18, 2015 EITF Meeting (SEC Update)
Description	This amendment provides SEC guidance that it would not object to filers presenting debt issue costs related to line-of-credit arrangements as an asset and ratably amortizing the costs over the term of the arrangement.
Date of Adoption	June 18, 2015 (early adoption permitted)
Effect on the financial statements or other significant matters	No