Recent Accounting Pronouncements	9 Months Ended
Jun. 30, 2017
Accounting Changes and Error Corrections [Abstract]
Recent Accounting Pronouncements	3. Recent Accounting Pronouncements Revenue from Contracts with Customers— In May 2014, the Financial Accounting Standards Board ("FASB") issued Accounting Standards Update ("ASU") No. 2014-09, Revenue from Contracts with Customers Topic 606 (ASU 2014-09), which supersedes nearly all existing revenue recognition guidance under U.S. GAAP. The core principle of ASU 2014-09 is to recognize revenues when promised goods or services are transferred to customers in an amount that reflects the consideration to which an entity expects to be entitled for those goods or services. ASU 2014-09 defines a five step process to achieve this core principle and, in doing so, more judgment and estimates may be required within the revenue recognition process than are required under existing U.S. GAAP including identifying performance obligations in the contract, estimating the amount of variable consideration to include in the transaction price and allocating the transaction price to each separate performance obligation. Subsequent to issuing ASU No. 2014-09, the FASB issued the following amendments concerning the adoption and clarification of ASU No. 2014-09. In August 2015, the FASB issued ASU No. 2015-14, Revenue from Contracts with Customers (Topic 606): Deferral of the Effective Date, which delayed the effective date of the new standard for the Company from October 1, 2017 to October 1, 2018. The FASB also agreed to allow entities to choose to adopt the standard as of the original effective date. In March 2016, the FASB issued ASU No. 2016-08, Revenue from Contracts with Customers (Topic 606): Principal versus Agent Considerations (Reporting Revenue Gross versus Net), which further clarifies the implementation guidance on principal versus agent considerations. The new guidance requires either a retrospective or a modified retrospective approach to adoption. In April 2016, the FASB issued ASU No. 2016-10 Revenue from Contracts with Customers (Topic 606): Identifying Performance Obligations and Licensing, which clarifies the identification of the performance obligations and licensing implementation guidance, while retaining the related principals of those areas. In May 2016, the FASB issued ASU No. 2016-12 Revenue from Contracts with Customers (Topic 606): Narrow-Scope Improvements and Practical Expedients, which provides clarification on assessing the collectability criterion, presentation of sales taxes, measurement date for noncash consideration and completed contracts at transition. In December 2016, the FASB issued ASU 2016-20 Revenue from Contracts with Customers (Topic 606): Technical Corrections and Improvements, which provides corrections or improvements to certain aspects of the guidance issued in Update 2014-09. The Company is evaluating the method of adoption and the potential impact that these ASUs will have on our financial position, results of operations, cash flows, and liquidity. Income Taxes— In November 2015, the FASB issued ASU No. 2015-17, Income Taxes (Topic 740): Balance Sheet Classification of Deferred Taxes. The new standard requires that deferred tax liabilities and assets be classified as non-current in a classified statement of financial position. The amendments in this update apply to all entities that present a classified statement of financial position. The Company is planning to adopt this standard as of July 1, 2017. As of June 30, 2017 and September 30, 2016, the Company had current deferred tax assets, net of current deferred tax liabilities, of $16.0 million and $18.0 million, respectively. Leases— In February 2016, the FASB issued ASU No. 2016-02—Leases (Topic 842). The new standard requires that all lessees recognize the assets and liabilities that arise from leases on the balance sheet and disclose qualitative and quantitative information about its leasing arrangements. The standard is to be applied using a modified retrospective approach and will be effective for the Company on October 1, 2019. The adoption of this standard is expected to have a material impact on the Company's financial position. As of September 30, 2016, the Company had gross operating lease commitments of approximately $284.1 million. Upon adoption, a substantial portion of these lease commitments will be recorded at their net present value as a right of use asset and a lease obligation. Stock Compensation— In March 2016, the FASB issued ASU No. 2016-09—Compensation—Stock Compensation (Topic 718): Improvements to Employee Share-Based Payment Accounting. The areas for simplification in this Update involve 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 new standard will be effective for the Company on October 1, 2017. The adoption of this standard is not expected to have a material impact on the Company's consolidated financial statements. Statement of Cash Flows— In August 2016, the FASB issued ASU No. 2016-15—Statement of Cash Flows (Topic 230): Classification of Certain Cash Receipts and Cash Payments. The update addresses eight specific cash flow issues with the objective of reducing the existing diversity in practice. The new standard will be effective for the Company on October 1, 2018. The Company is currently evaluating the potential impact that this standard may have on its consolidated financial statements. Statement of Cash Flows— In November 2016, the FASB issued ASU No. 2016-18—Statement of Cash Flows (Topic 230): Restricted Cash. The update requires that a statement of cash flows explain the change during the period in the total of cash, cash equivalents, and amounts generally described as restricted cash or restricted cash equivalents. Therefore, amounts generally described as restricted cash and restricted cash equivalents should be included with cash and cash equivalents when reconciling the beginning-of-period and end-of-period total amounts shown on the statement of cash flows. The new standard will be effective for the Company on October 1, 2018. As of June 30, 2017 and September 30, 2016, the Company had total restricted cash amounts of $50.3 million and $51.0 million, respectively. The Company is currently evaluating the method and timing of the adoption of this standard. Business Combinations— In January 2017, the FASB issued ASU No. 2017-01—Business Combinations (Topic 805): Clarifying the Definition of a Business. The update provides guidance to determine when an integrated set of assets and activities is not a business. When substantially all of the fair value of the gross assets acquired, or disposed of, is concentrated in a single identifiable asset or a group of similar identifiable assets, then the acquisition, or disposition, is not a business. Under this update there will be fewer purchases that will be treated as business combinations. The new standard will be effective for the Company on October 1, 2018. The Company is currently evaluating the potential impact that this standard may have on its consolidated financial statements. Intangibles—Goodwill and Other— In January 2017, the FASB issued ASU No. 2017-04—Intangibles—Goodwill and Other (Topic 350): Simplifying the Test for Goodwill Impairment. The update eliminates Step 2 from the goodwill impairment test to simplify the subsequent measurement of goodwill. The new standard is effective for its annual or any interim goodwill impairment tests in fiscal years beginning after December 15, 2019 with early adoption permitted for interim or annual goodwill tests performed on testing dates after January 1, 2017. The Company is planning to adopt this standard as of July 1, 2017 and currently evaluating the potential impact.

3. Recent Accounting Pronouncements

Revenue from Contracts with Customers— In May 2014, the Financial Accounting Standards Board ("FASB") issued Accounting Standards Update ("ASU") No. 2014-09, Revenue from Contracts with Customers Topic 606 (ASU 2014-09), which supersedes nearly all existing revenue recognition guidance under U.S. GAAP. The core principle of ASU 2014-09 is to recognize revenues when promised goods or services are transferred to customers in an amount that reflects the consideration to which an entity expects to be entitled for those goods or services. ASU 2014-09 defines a five step process to achieve this core principle and, in doing so, more judgment and estimates may be required within the revenue recognition process than are required under existing U.S. GAAP including identifying performance obligations in the contract, estimating the amount of variable consideration to include in the transaction price and allocating the transaction price to each separate performance obligation.

Subsequent to issuing ASU No. 2014-09, the FASB issued the following amendments concerning the adoption and clarification of ASU No. 2014-09. In August 2015, the FASB issued ASU No. 2015-14, Revenue from Contracts with Customers (Topic 606): Deferral of the Effective Date, which delayed the effective date of the new standard for the Company from October 1, 2017 to October 1, 2018. The FASB also agreed to allow entities to choose to adopt the standard as of the original effective date. In March 2016, the FASB issued ASU No. 2016-08, Revenue from Contracts with Customers (Topic 606): Principal versus Agent Considerations (Reporting Revenue Gross versus Net), which further clarifies the implementation guidance on principal versus agent considerations. The new guidance requires either a retrospective or a modified retrospective approach to adoption. In April 2016, the FASB issued ASU No. 2016-10 Revenue from Contracts with Customers (Topic 606): Identifying Performance Obligations and Licensing, which clarifies the identification of the performance obligations and licensing implementation guidance, while retaining the related principals of those areas. In May 2016, the FASB issued ASU No. 2016-12 Revenue from Contracts with Customers (Topic 606): Narrow-Scope Improvements and Practical Expedients, which provides clarification on assessing the collectability criterion, presentation of sales taxes, measurement date for noncash consideration and completed contracts at transition. In December 2016, the FASB issued ASU 2016-20 Revenue from Contracts with Customers (Topic 606): Technical Corrections and Improvements, which provides corrections or improvements to certain aspects of the guidance issued in Update 2014-09. The Company is evaluating the method of adoption and the potential impact that these ASUs will have on our financial position, results of operations, cash flows, and liquidity.

Income Taxes— In November 2015, the FASB issued ASU No. 2015-17, Income Taxes (Topic 740): Balance Sheet Classification of Deferred Taxes. The new standard requires that deferred tax liabilities and assets be classified as non-current in a classified statement of financial position. The amendments in this update apply to all entities that present a classified statement of financial position. The Company is planning to adopt this standard as of July 1, 2017. As of June 30, 2017 and September 30, 2016, the Company had current deferred tax assets, net of current deferred tax liabilities, of $16.0 million and $18.0 million, respectively.

Leases— In February 2016, the FASB issued ASU No. 2016-02—Leases (Topic 842). The new standard requires that all lessees recognize the assets and liabilities that arise from leases on the balance sheet and disclose qualitative and quantitative information about its leasing arrangements. The standard is to be applied using a modified retrospective approach and will be effective for the Company on October 1, 2019. The adoption of this standard is expected to have a material impact on the Company's financial position. As of September 30, 2016, the Company had gross operating lease commitments of approximately $284.1 million. Upon adoption, a substantial portion of these lease commitments will be recorded at their net present value as a right of use asset and a lease obligation.

Stock Compensation— In March 2016, the FASB issued ASU No. 2016-09—Compensation—Stock Compensation (Topic 718): Improvements to Employee Share-Based Payment Accounting. The areas for simplification in this Update involve 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 new standard will be effective for the Company on October 1, 2017. The adoption of this standard is not expected to have a material impact on the Company's consolidated financial statements.

Statement of Cash Flows— In August 2016, the FASB issued ASU No. 2016-15—Statement of Cash Flows (Topic 230): Classification of Certain Cash Receipts and Cash Payments. The update addresses eight specific cash flow issues with the objective of reducing the existing diversity in practice. The new standard will be effective for the Company on October 1, 2018. The Company is currently evaluating the potential impact that this standard may have on its consolidated financial statements.

Statement of Cash Flows— In November 2016, the FASB issued ASU No. 2016-18—Statement of Cash Flows (Topic 230): Restricted Cash. The update requires that a statement of cash flows explain the change during the period in the total of cash, cash equivalents, and amounts generally described as restricted cash or restricted cash equivalents. Therefore, amounts generally described as restricted cash and restricted cash equivalents should be included with cash and cash equivalents when reconciling the beginning-of-period and end-of-period total amounts shown on the statement of cash flows. The new standard will be effective for the Company on October 1, 2018. As of June 30, 2017 and September 30, 2016, the Company had total restricted cash amounts of $50.3 million and $51.0 million, respectively. The Company is currently evaluating the method and timing of the adoption of this standard.

Business Combinations— In January 2017, the FASB issued ASU No. 2017-01—Business Combinations (Topic 805): Clarifying the Definition of a Business. The update provides guidance to determine when an integrated set of assets and activities is not a business. When substantially all of the fair value of the gross assets acquired, or disposed of, is concentrated in a single identifiable asset or a group of similar identifiable assets, then the acquisition, or disposition, is not a business. Under this update there will be fewer purchases that will be treated as business combinations. The new standard will be effective for the Company on October 1, 2018. The Company is currently evaluating the potential impact that this standard may have on its consolidated financial statements.

Intangibles—Goodwill and Other— In January 2017, the FASB issued ASU No. 2017-04—Intangibles—Goodwill and Other (Topic 350): Simplifying the Test for Goodwill Impairment. The update eliminates Step 2 from the goodwill impairment test to simplify the subsequent measurement of goodwill. The new standard is effective for its annual or any interim goodwill impairment tests in fiscal years beginning after December 15, 2019 with early adoption permitted for interim or annual goodwill tests performed on testing dates after January 1, 2017. The Company is planning to adopt this standard as of July 1, 2017 and currently evaluating the potential impact.