Recent accounting pronouncements	12 Months Ended
Dec. 31, 2017
New Accounting Pronouncements and Changes in Accounting Principles [Abstract]
Recent accounting pronouncements	Recent accounting pronouncements Accounting Standards Adopted in 2017 In March 2016, the FASB issued Accounting Standards Update (“ASU”) 2016-07, “Investments - Equity Method and Joint Ventures (Topic 323) - Simplifying the Transition to the Equity Method of Accounting.” The amendments in this ASU eliminate the requirement to retroactively adopt the equity method of accounting when an investment becomes qualified for the equity method of accounting as a result of an increase in the level of ownership interest or degree of influence. The amendments in this ASU became effective for the Company on January 1, 2017. Adoption of this guidance did not have a material impact on the Company’s Consolidated Financial Statements. In March 2016, the FASB issued ASU 2016-09, “Compensation - Stock Compensation (Topic 718) - Improvements to Employee Share-Based Payment Accounting.” The amendments in this ASU simplify several aspects of the accounting for share-based payment transactions, including the income tax consequences, classification of awards as either equity or liabilities and classification on the statement of cash flows. The amendments in this ASU became effective for the Company on January 1, 2017. Adoption of this guidance did not have a material impact on the Company’s Consolidated Financial Statements. In October 2016, the FASB issued ASU 2016-17, “Consolidation (Topic 810) - Interests Held Through Related Parties That Are Under Common Control.” The amendments in this ASU do not change the characteristics of a primary beneficiary in current U.S. GAAP. Rather, the ASU requires that a reporting entity, in determining whether it satisfies the second characteristic of a primary beneficiary, include all of its direct variable interests in a VIE and, on a proportionate basis, its indirect variable interests in a VIE held through related parties, including related parties that are under common control with the reporting entity. The amendments in this ASU became effective for the Company on January 1, 2017. Adoption of this guidance did not have a material impact on the Company’s Consolidated Financial Statements. In November 2016, the FASB issued ASU 2016-18, “Statement of Cash Flows (Topic 320) - Restricted Cash.” This ASU is directed at reducing diversity that exists in the classification and presentation of changes in restricted cash on the statement of cash flows. The ASU is effective for fiscal periods beginning after December 15, 2017, and interim periods within those fiscal years. Early adoption is permitted, including adoption in an interim period. During the fourth quarter of 2017, the Company early adopted and implemented this guidance utilizing the full retrospective approach for all periods presented in the Company’s Consolidated Financial Statements. As a result of the adoption of ASU 2016-18, the Company’s Consolidated Statements of Cash Flows now explain the change during the period in the total of cash, cash equivalents, and restricted cash. Therefore, restricted cash is now included with cash and cash equivalents in the reconciliation the beginning-of-period and end-of-period total amounts shown on the statement of cash flows. Prior to adoption, changes in restricted cash had been presented as a cash flow provided by (used in) investing activities. Consequently, the Consolidated Statements of Cash Flows for the years ended December 31, 2016 and 2015 include revisions to increase net cash used in investing activities by $2,314 and $99,733, respectively. In August 2017, the FASB issued ASU 2017-12, “Derivatives and Hedging (Topic 815).” This ASU is directed at targeted improvements to accounting for hedging activities. This ASU is effective for fiscal years beginning after December 15, 2018, and interim periods within those fiscal years. Early adoption is permitted, including adoption in an interim period. During the fourth quarter of 2017, the Company early adopted and implemented this guidance with the effect of the adoption reflected as of January 1, 2017 in these Consolidated Financial Statements. Adoption of this guidance did not have a material impact on the Company’s Consolidated Financial Statements. Recently Issued Accounting Standards Not Yet Adopted In February 2018, the FASB issued ASU 2018-02, “Income Statement - Reporting Comprehensive Income (Topic 220).” Current GAAP requires that deferred tax liabilities and assets be adjusted for the effect of a change in tax laws or rates with the effect included in net income. This guidance is applicable even in situations in which the related income tax effects on items in accumulated other comprehensive income were originally recognized in other comprehensive income (rather than in net income). The amendments in this update allow a reclassification from accumulated other comprehensive income to retained earnings for the tax effects of items within accumulated other comprehensive income (referred to as “stranded tax effects”) resulting from the Tax Cuts and Jobs Act enacted by the U.S. on December 22, 2017 (“2017 Tax Act”). Consequently, the amendments eliminate the stranded tax effects resulting from the 2017 Tax Act. The amendments in this Update also require certain disclosures about stranded tax effects. This ASU is effective for fiscal years beginning after December 15, 2018, and interim periods within those fiscal years. The Company has evaluated the impact of this guidance and has determined that it will not have a material impact on the Company’s Consolidated Financial Statements. The Company intends to adopt this guidance on January 1, 2019.

Recent accounting pronouncements

Accounting Standards Adopted in 2017

In March 2016, the FASB issued Accounting Standards Update (“ASU”) 2016-07, “Investments - Equity Method and Joint Ventures (Topic 323) - Simplifying the Transition to the Equity Method of Accounting.” The amendments in this ASU eliminate the requirement to retroactively adopt the equity method of accounting when an investment becomes qualified for the equity method of accounting as a result of an increase in the level of ownership interest or degree of influence. The amendments in this ASU became effective for the Company on January 1, 2017. Adoption of this guidance did not have a material impact on the Company’s Consolidated Financial Statements.

In March 2016, the FASB issued ASU 2016-09, “Compensation - Stock Compensation (Topic 718) - Improvements to Employee Share-Based Payment Accounting.” The amendments in this ASU simplify several aspects of the accounting for share-based payment transactions, including the income tax consequences, classification of awards as either equity or liabilities and classification on the statement of cash flows. The amendments in this ASU became effective for the Company on January 1, 2017. Adoption of this guidance did not have a material impact on the Company’s Consolidated Financial Statements.

In October 2016, the FASB issued ASU 2016-17, “Consolidation (Topic 810) - Interests Held Through Related Parties That Are Under Common Control.” The amendments in this ASU do not change the characteristics of a primary beneficiary in current U.S. GAAP. Rather, the ASU requires that a reporting entity, in determining whether it satisfies the second characteristic of a primary beneficiary, include all of its direct variable interests in a VIE and, on a proportionate basis, its indirect variable interests in a VIE held through related parties, including related parties that are under common control with the reporting entity. The amendments in this ASU became effective for the Company on January 1, 2017. Adoption of this guidance did not have a material impact on the Company’s Consolidated Financial Statements.

In November 2016, the FASB issued ASU 2016-18, “Statement of Cash Flows (Topic 320) - Restricted Cash.” This ASU is directed at reducing diversity that exists in the classification and presentation of changes in restricted cash on the statement of cash flows. The ASU is effective for fiscal periods beginning after December 15, 2017, and interim periods within those fiscal years. Early adoption is permitted, including adoption in an interim period. During the fourth quarter of 2017, the Company early adopted and implemented this guidance utilizing the full retrospective approach for all periods presented in the Company’s Consolidated Financial Statements.

As a result of the adoption of ASU 2016-18, the Company’s Consolidated Statements of Cash Flows now explain the change during the period in the total of cash, cash equivalents, and restricted cash. Therefore, restricted cash is now included with cash and cash equivalents in the reconciliation the beginning-of-period and end-of-period total amounts shown on the statement of cash flows. Prior to adoption, changes in restricted cash had been presented as a cash flow provided by (used in) investing activities. Consequently, the Consolidated Statements of Cash Flows for the years ended December 31, 2016 and 2015 include revisions to increase net cash used in investing activities by $2,314 and $99,733, respectively.

In August 2017, the FASB issued ASU 2017-12, “Derivatives and Hedging (Topic 815).” This ASU is directed at targeted improvements to accounting for hedging activities. This ASU is effective for fiscal years beginning after December 15, 2018, and interim periods within those fiscal years. Early adoption is permitted, including adoption in an interim period. During the fourth quarter of 2017, the Company early adopted and implemented this guidance with the effect of the adoption reflected as of January 1, 2017 in these Consolidated Financial Statements. Adoption of this guidance did not have a material impact on the Company’s Consolidated Financial Statements.

Recently Issued Accounting Standards Not Yet Adopted

In February 2018, the FASB issued ASU 2018-02, “Income Statement - Reporting Comprehensive Income (Topic 220).” Current GAAP requires that deferred tax liabilities and assets be adjusted for the effect of a change in tax laws or rates with the effect included in net income. This guidance is applicable even in situations in which the related income tax effects on items in accumulated other comprehensive income were originally recognized in other comprehensive income (rather than in net income). The amendments in this update allow a reclassification from accumulated other comprehensive income to retained earnings for the tax effects of items within accumulated other comprehensive income (referred to as “stranded tax effects”) resulting from the Tax Cuts and Jobs Act enacted by the U.S. on December 22, 2017 (“2017 Tax Act”). Consequently, the amendments eliminate the stranded tax effects resulting from the 2017 Tax Act. The amendments in this Update also require certain disclosures about stranded tax effects. This ASU is effective for fiscal years beginning after December 15, 2018, and interim periods within those fiscal years. The Company has evaluated the impact of this guidance and has determined that it will not have a material impact on the Company’s Consolidated Financial Statements. The Company intends to adopt this guidance on January 1, 2019.