Recent Accounting Pronouncements (Detail)	12 Months Ended
	Dec. 31, 2014
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Standard	ASU 2011-11, Balance Sheet: isclosures about Offsetting ssets 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 2015-01
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Standard	ASU 2015-02 Consolidation Topic 810) Amendments to the onsolidation 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.
Date of Adoption	January 1, 2016 (early adoption permitted)
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 2015-01 Income Statement - xtraordinary 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 2014-16
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Standard	ASU 2014-16 Derivatives and edging (Topic 815) Determining hether the Host Contract in a ybrid Financial Instrument ssued in the Form of a Share s 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 2014-15
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Standard	SU 2014-15, Presentation of inancial Statements - Going oncern (Subtopic 205-04) isclosure of Uncertainties bout an Entity's Ability to ontinue 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 2014-13
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Standard	SU 2014-13, Consolidation Topic 810) Measuring the inancial Assets and the inancial Liabilities of a onsolidated Collateralized inancing 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 014-11, Repurchase-to-Maturity ransactions, Repurchase inancings, 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, except for the disclosure requirements for transactions accounted for as secured borrowings, which are required to be presented for interim periods beginning after March 15, 2015
Effect on the financial statements or other significant matters	Yes
Accounting Standards Update 2014-09
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Standard	ASU 2014-09, Revenue from ontracts 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, 2017
Effect on the financial statements or other significant matters	No
Accounting Standards Update 2014-08
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Standard	ASU 2014-08, Presentation of inancial Statements (Topic 05) and Property, Plant and quipment (Topic 360) Reporting iscontinued Operations and isclosures of Disposals of omponents of an Entity
Description	This ASU raises the threshold for a disposal to be treated as discontinued operations.
Date of Adoption	January 1, 2015 (early adoption permitted)
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	SU 014-04 Receivables-Troubled ebt Restructurings by reditors, Reclassification of esidential Real Estate ollateralized Consumer ortgage 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 2014-17 Business ombinations (Topic 805): ushdown 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
Accounting Standards Update 2011-11
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Standard	ASU 2013-02, Comprehensive ncome: Reporting of Amounts eclassified Out of Accumulated ther 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