New Accounting Pronouncements	9 Months Ended
Sep. 30, 2016
Accounting Policies [Abstract]
New Accounting Pronouncements	New accounting pronouncements Recently Adopted In January 2015, the Financial Accounting Standards Board ("FASB") issued Accounting Standards Update ("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 interim and annual reporting periods 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 interim and annual reporting periods in the fiscal year that began after December 15, 2015. The adoption of the ASU impacted the disclosure of variable interest entities ("VIEs") but did not have a material impact on the Company's condensed consolidated financial statements. See Note 8, 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 interim and annual reporting periods 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 interim and annual reporting periods in the fiscal year that began after December 15, 2015. The adoption of the ASU impacted the Company's fair value disclosures but did not have a material impact on the Company's condensed consolidated financial statements. See Note 6, 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 provides amendments that defer the effective date of ASU 2014-09 by one year. In 2016, the FASB additionally issued ASU No. 2016-08-Revenue from Contracts with Customers (Topic 606): Principal versus Agent Considerations (Reporting Revenue Gross versus Net); ASU No. 2016-10, "Identifying Performance Obligations and Licensing"; and ASU 2016-12 Revenue from Contracts with Customers (Topic 606); Narrow-Scope Improvements and Practical Expedients. The amendments in these updates are effective either retrospectively to each prior reporting period presented, or as a cumulative-effect adjustment as of the date of adoption, during interim and annual periods beginning after December 15, 2017, with early adoption permitted beginning after December 15, 2016. The Company is currently assessing the impact of the adoption of this update on its financial condition, results of operations and cash flows, and disclosures related thereto. 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 of the ASU 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 the recognition of a right-of use asset and lease liability on the balance sheet by lessees for those leases classified as operating leases under previous guidance. The ASU is effective for fiscal years beginning after December 15, 2018. The Company is currently evaluating the impact of adopting this ASU which it expects will have a material impact on its condensed consolidated financial statements. Since the Company has operating leases in over 100 locations, the Company expects to recognize a significant right-of use asset and lease liability on its condensed consolidated balance sheet upon adoption of this ASU. 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 adoption of the ASU is not expected to have a material impact on the Company's condensed consolidated financial statements. In June 2016, the FASB issued ASU 2016-13, "Measurement of Credit Losses on Financial Instruments," which amends the FASB's guidance on the impairment of financial Instruments. The ASU adds to U.S. GAAP an impairment model ("current expected credit loss model"). Under this new guidance, an entity recognizes as an allowance its estimate of expected credit losses. The ASU is effective for the fiscal year beginning after December 15, 2019. The Company is currently evaluating the impact, if any, that the ASU will have on its condensed consolidated financial statements. In August 2016, the FASB issued ASC 2016-15 "Classification of Certain Cash Receipts and Cash Payments," which amends the guidance on the classification of certain cash receipts and payments in the statement of cash flow. The ASU is effective for the fiscal year beginning after December 15, 2017 and early adoption is permitted. The Company will not early adopt this ASU. The Company is currently evaluating the impact of the ASU and the adoption of the ASU is not expected to have a material impact on its condensed consolidated financial statements.

New accounting pronouncements

Recently Adopted

In January 2015, the Financial Accounting Standards Board ("FASB") issued Accounting Standards Update ("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 interim and annual reporting periods 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 interim and annual reporting periods in the fiscal year that began after December 15, 2015. The adoption of the ASU impacted the disclosure of variable interest entities ("VIEs") but did not have a material impact on the Company's condensed consolidated financial statements. See Note 8, 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 interim and annual reporting periods 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 interim and annual reporting periods in the fiscal year that began after December 15, 2015. The adoption of the ASU impacted the Company's fair value disclosures but did not have a material impact on the Company's condensed consolidated financial statements. See Note 6, 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 provides amendments that defer the effective date of ASU 2014-09 by one year. In 2016, the FASB additionally issued ASU No. 2016-08-Revenue from Contracts with Customers (Topic 606): Principal versus Agent Considerations (Reporting Revenue Gross versus Net); ASU No. 2016-10, "Identifying Performance Obligations and Licensing"; and ASU 2016-12 Revenue from Contracts with Customers (Topic 606); Narrow-Scope Improvements and Practical Expedients. The amendments in these updates are effective either retrospectively to each prior reporting period presented, or as a cumulative-effect adjustment as of the date of adoption, during interim and annual periods beginning after December 15, 2017, with early adoption permitted beginning after December 15, 2016. The Company is currently assessing the impact of the adoption of this update on its financial condition, results of operations and cash flows, and disclosures related thereto.

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 of the ASU 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 the recognition of a right-of use asset and lease liability on the balance sheet by lessees for those leases classified as operating leases under previous guidance. The ASU is effective for fiscal years beginning after December 15, 2018. The Company is currently evaluating the impact of adopting this ASU which it expects will have a material impact on its condensed consolidated financial statements. Since the Company has operating leases in over 100 locations, the Company expects to recognize a significant right-of use asset and lease liability on its condensed consolidated balance sheet upon adoption of this ASU.

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 adoption of the ASU is not expected to have a material impact on the Company's condensed consolidated financial statements.

In June 2016, the FASB issued ASU 2016-13, "Measurement of Credit Losses on Financial Instruments," which amends the FASB's guidance on the impairment of financial Instruments. The ASU adds to U.S. GAAP an impairment model ("current expected credit loss model"). Under this new guidance, an entity recognizes as an allowance its estimate of expected credit losses. The ASU is effective for the fiscal year beginning after December 15, 2019. The Company is currently evaluating the impact, if any, that the ASU will have on its condensed consolidated financial statements.

In August 2016, the FASB issued ASC 2016-15 "Classification of Certain Cash Receipts and Cash Payments," which amends the guidance on the classification of certain cash receipts and payments in the statement of cash flow. The ASU is effective for the fiscal year beginning after December 15, 2017 and early adoption is permitted. The Company will not early adopt this ASU. The Company is currently evaluating the impact of the ASU and the adoption of the ASU is not expected to have a material impact on its condensed consolidated financial statements.