New Accounting Pronouncements (Policies)	3 Months Ended
Mar. 31, 2016
Accounting Policies [Abstract]
New Accounting Pronouncements	Recently Adopted In April 2014, the FASB issued ASU No. 2014-08, "Reporting Discontinued Operations and Disclosures of Disposals of Components of an Entity." Under this ASU, a discontinued operation is defined as a disposal of a component or group of components that is disposed of and represents a strategic shift that has or will have a major effect on an entity's operation. The ASU also modified related disclosure requirements. The ASU became effective for the annual reporting period in the fiscal year that began after December 15, 2014. The adoption of this accounting guidance did not have a material impact on the Company's condensed consolidated financial statements. In June 2014, the FASB issued ASU No. 2014-11, "Transfers and Servicing – Repurchase-to-Maturity Transactions, Repurchase Financing, and Disclosures," which makes amendments to the guidance in Accounting Standards Codification 860 on accounting for certain repurchase agreements. The ASU became effective for the annual reporting period in the fiscal year that began after December 15, 2015, except for the disclosures related to transactions accounted for as secured borrowings, which became effective for the period that began on or after March 15, 2015. The adoption of this accounting guidance did not have a material impact on the Company's condensed consolidated financial statements. See Note 6, Collateralized transactions, below. In June 2014, the FASB issued ASU No. 2014-12, "Compensation - Stock Compensation." The ASU clarifies that entities should treat performance targets that can be met after the requisite service period of a share-based award as performance conditions that affect vesting. The ASU became effective for the annual reporting period in the fiscal year that began after December 15, 2015. The adoption of the ASU did not have a material impact on the Company's condensed consolidated financial statements. In November 2014, the FASB issued ASU No. 2014-17, "Business Combination - Pushdown Accounting." The ASU gives the acquired entity the option of applying pushdown accounting in its stand-alone financial statements upon a change-in-control event. The ASU became effective upon issuance. The adoption of this accounting guidance did not have a material impact on the Company's condensed consolidated financial statements. In January 2015, the FASB issued ASU No. 2015-01, "Income Statement - Extraordinary and Unusual Items," to simplify income statement classification by removing the concept of extraordinary items. Under the existing guidance, an entity is required to separately disclose extraordinary items, net of tax, in the income statement after income from continuing operations if an event or transaction is of an unusual nature and occurs infrequently. This separate, net-of-tax presentation (and corresponding earnings per share impact) will no longer be allowed. However, the existing requirement to separately present items that are of an unusual nature or occur infrequently on a pre-tax basis within income from continuing operations has been retained. The ASU became effective for the annual reporting period in the fiscal year that began after December 15, 2015. The adoption of the ASU did not have a material impact on the Company's condensed consolidated financial statements. In February 2015, the FASB issued ASU No. 2015-02, "Consolidation - Amendments to the Consolidation Analysis," to eliminate the deferral of the application of the revised consolidation rules and make changes to both the variable interest model and the voting model. Under this ASU, a general partner will not consolidate a partnership or similar entity under the voting model. The ASU became effective for the annual reporting period in the fiscal year that began after December 15, 2015. The adoption of the ASU impacted the disclosure of VIEs but did not have a material impact on the Company's condensed consolidated financial statements. See Note 7, Variable interest entities, below. In April 2015, the FASB issued ASU No. 2015-03, "Simplifying the Presentation of Debt Issuance Costs," which requires debt issuance costs to be presented in the balance sheet as a direct deduction from the carrying value of the associated debt liability. The ASU became effective for the annual reporting period in the fiscal year that began after December 15, 2015. The adoption of the ASU did not have a material impact on the Company's condensed consolidated financial statements. In May 2015, the FASB issued ASU No. 2015-07, “Disclosures for Investments in Certain Entities That Calculate Net Asset Value per Share (or Its Equivalent),” which removes the requirement to categorize within the fair value hierarchy all investments measured using the net asset value per share practical expedient and related disclosures. The ASU became effective for the annual reporting periods in the fiscal year that began after December 15, 2015. The adoption of the ASU impacted the fair value disclosures but did not have a material impact on the Company's condensed consolidated financial statements. See Note 5, Fair value measurements, below. Recently Issued In May 2014, the FASB issued ASU No. 2014-09, "Revenue from Contracts with Customers." The ASU outlines a single comprehensive model for entities to use in accounting for revenue arising from contracts with customers. Additionally, the ASU expands the disclosure requirements for revenue recognition. The ASU was originally effective for the annual reporting period in the fiscal year that begins after December 15, 2016. In August 2015, the FASB issued ASU No. 2015-14, "Revenue from Contracts with Customers: Deferral of the Effective Date." which defers the effective date of the standard to the annual reporting period in the fiscal year that begins after December 15, 2017 and early adoption is permitted as of the original effective date. The Company is currently evaluating the impact, if any, that the ASU will have on its condensed consolidated financial statements. In August 2014, the FASB issued ASU No. 2014-15, "Disclosure of Uncertainties About an Entity's Ability to Continue as a Going Concern," which provides guidance on determining when and how reporting entities must disclose going-concern uncertainties in their financial statements. The ASU requires management of an entity to perform interim and annual assessments of an entity's ability to continue as a going concern within one year of the date of issuance of the entity's financial statements and also provide disclosures if there is "substantial doubt about the entity's ability to continue as a going concern." The ASU is effective for the annual reporting period in the fiscal year that begins after December 15, 2016 and early adoption is permitted. The Company will not early adopt this ASU. The Company is currently evaluating the impact on its disclosure. In January 2016, the FASB issued ASU 2016-01, “Recognition and Measurement of Financial Assets and Financial Liabilities,” which revises an entity's accounting related to the classification and measurement of investments in equity securities, changes the presentation of certain fair value changes relating to instrument specific credit risk for financial liabilities and amends certain disclosure requirements associated with the fair value of financial instruments. The ASU is effective for fiscal years beginning after December 15, 2017. The adoption of the ASU will not have a material impact on the Company's condensed consolidated financial statements. In February 2016, the FASB issued ASU 2016-02, "Leases." The ASU requires most leases to be reflected on the balance sheet. The ASU is effective for fiscal years beginning after December 15, 2018. The Company is currently evaluating the impact of the ASU. The adoption of the new lessee model is expected to have material impact on the Company's condensed consolidated financial statements. In March, 2016, the FASB issued ASU 2016-09, "Improvements to Employee Share-Based Payment Accounting," which simplifies several aspects of the accounting for employee share-based payment transactions, including the accounting for income taxes, forfeitures, and minimum statutory tax withholding requirements, as well as classification in the statement of cash flows. The ASU is effective for fiscal year beginning after December 15, 2016 and early adoption is permitted. The Company will not early adopt this ASU. The Company is currently evaluating the impact, if any, that the ASU will have on its condensed consolidated financial statements.

Recently Adopted

In April 2014, the FASB issued ASU No. 2014-08, "Reporting Discontinued Operations and Disclosures of Disposals of Components of an Entity." Under this ASU, a discontinued operation is defined as a disposal of a component or group of components that is disposed of and represents a strategic shift that has or will have a major effect on an entity's operation. The ASU also modified related disclosure requirements. The ASU became effective for the annual reporting period in the fiscal year that began after December 15, 2014. The adoption of this accounting guidance did not have a material impact on the Company's condensed consolidated financial statements.

In June 2014, the FASB issued ASU No. 2014-11, "Transfers and Servicing – Repurchase-to-Maturity Transactions, Repurchase Financing, and Disclosures," which makes amendments to the guidance in Accounting Standards Codification 860 on accounting for certain repurchase agreements. The ASU became effective for the annual reporting period in the fiscal year that began after December 15, 2015, except for the disclosures related to transactions accounted for as secured borrowings, which became effective for the period that began on or after March 15, 2015. The adoption of this accounting guidance did not have a material impact on the Company's condensed consolidated financial statements. See Note 6, Collateralized transactions, below.

In June 2014, the FASB issued ASU No. 2014-12, "Compensation - Stock Compensation." The ASU clarifies that entities should treat performance targets that can be met after the requisite service period of a share-based award as performance conditions that affect vesting. The ASU became effective for the annual reporting period in the fiscal year that began after December 15, 2015. The adoption of the ASU did not have a material impact on the Company's condensed consolidated financial statements.

In November 2014, the FASB issued ASU No. 2014-17, "Business Combination - Pushdown Accounting." The ASU gives the acquired entity the option of applying pushdown accounting in its stand-alone financial statements upon a change-in-control event. The ASU became effective upon issuance. The adoption of this accounting guidance did not have a material impact on the Company's condensed consolidated financial statements.

In January 2015, the FASB issued ASU No. 2015-01, "Income Statement - Extraordinary and Unusual Items," to simplify income statement classification by removing the concept of extraordinary items. Under the existing guidance, an entity is required to separately disclose extraordinary items, net of tax, in the income statement after income from continuing operations if an event or transaction is of an unusual nature and occurs infrequently. This separate, net-of-tax presentation (and corresponding earnings per share impact) will no longer be allowed. However, the existing requirement to separately present items that are of an unusual nature or occur infrequently on a pre-tax basis within income from continuing operations has been retained. The ASU became effective for the annual reporting period in the fiscal year that began after December 15, 2015. The adoption of the ASU did not have a material impact on the Company's condensed consolidated financial statements.

In February 2015, the FASB issued ASU No. 2015-02, "Consolidation - Amendments to the Consolidation Analysis," to eliminate the deferral of the application of the revised consolidation rules and make changes to both the variable interest model and the voting model. Under this ASU, a general partner will not consolidate a partnership or similar entity under the voting model. The ASU became effective for the annual reporting period in the fiscal year that began after December 15, 2015. The adoption of the ASU impacted the disclosure of VIEs but did not have a material impact on the Company's condensed consolidated financial statements. See Note 7, Variable interest entities, below.

In April 2015, the FASB issued ASU No. 2015-03, "Simplifying the Presentation of Debt Issuance Costs," which requires debt issuance costs to be presented in the balance sheet as a direct deduction from the carrying value of the associated debt liability. The ASU became effective for the annual reporting period in the fiscal year that began after December 15, 2015. The adoption of the ASU did not have a material impact on the Company's condensed consolidated financial statements.

In May 2015, the FASB issued ASU No. 2015-07, “Disclosures for Investments in Certain Entities That Calculate Net Asset Value per Share (or Its Equivalent),” which removes the requirement to categorize within the fair value hierarchy all investments measured using the net asset value per share practical expedient and related disclosures. The ASU became effective for the annual reporting periods in the fiscal year that began after December 15, 2015. The adoption of the ASU impacted the fair value disclosures but did not have a material impact on the Company's condensed consolidated financial statements. See Note 5, Fair value measurements, below.

Recently Issued

In May 2014, the FASB issued ASU No. 2014-09, "Revenue from Contracts with Customers." The ASU outlines a single comprehensive model for entities to use in accounting for revenue arising from contracts with customers. Additionally, the ASU expands the disclosure requirements for revenue recognition. The ASU was originally effective for the annual reporting period in the fiscal year that begins after December 15, 2016. In August 2015, the FASB issued ASU No. 2015-14, "Revenue from Contracts with Customers: Deferral of the Effective Date." which defers the effective date of the standard to the annual reporting period in the fiscal year that begins after December 15, 2017 and early adoption is permitted as of the original effective date. The Company is currently evaluating the impact, if any, that the ASU will have on its condensed consolidated financial statements.

In August 2014, the FASB issued ASU No. 2014-15, "Disclosure of Uncertainties About an Entity's Ability to Continue as a Going Concern," which provides guidance on determining when and how reporting entities must disclose going-concern uncertainties in their financial statements. The ASU requires management of an entity to perform interim and annual assessments of an entity's ability to continue as a going concern within one year of the date of issuance of the entity's financial statements and also provide disclosures if there is "substantial doubt about the entity's ability to continue as a going concern." The ASU is effective for the annual reporting period in the fiscal year that begins after December 15, 2016 and early adoption is permitted. The Company will not early adopt this ASU. The Company is currently evaluating the impact on its disclosure.

In January 2016, the FASB issued ASU 2016-01, “Recognition and Measurement of Financial Assets and Financial Liabilities,” which revises an entity's accounting related to the classification and measurement of investments in equity securities, changes the presentation of certain fair value changes relating to instrument specific credit risk for financial liabilities and amends certain disclosure requirements associated with the fair value of financial instruments. The ASU is effective for fiscal years beginning after December 15, 2017. The adoption of the ASU will not have a material impact on the Company's condensed consolidated financial statements.

In February 2016, the FASB issued ASU 2016-02, "Leases." The ASU requires most leases to be reflected on the balance sheet. The ASU is effective for fiscal years beginning after December 15, 2018. The Company is currently evaluating the impact of the ASU. The adoption of the new lessee model is expected to have material impact on the Company's condensed consolidated financial statements.

In March, 2016, the FASB issued ASU 2016-09, "Improvements to Employee Share-Based Payment Accounting," which simplifies several aspects of the accounting for employee share-based payment transactions, including the accounting for income taxes, forfeitures, and minimum statutory tax withholding requirements, as well as classification in the statement of cash flows. The ASU is effective for fiscal year beginning after December 15, 2016 and early adoption is permitted. The Company will not early adopt this ASU. The Company is currently evaluating the impact, if any, that the ASU will have on its condensed consolidated financial statements.