Recent accounting pronouncements and accounting changes	12 Months Ended
Dec. 31, 2016
Accounting Changes and Error Corrections [Abstract]
Recent accounting pronouncements and accounting changes	Recent accounting pronouncements and accounting changes Effective January 1, 2016, the company adopted new guidance issued by the Financial Accounting Standards Board ("FASB") on the presentation of debt issuance costs. The new guidance requires that debt issuance costs shall be reported in the balance sheet as a direct deduction from the face amount of that debt. Previously the company reported these costs in “Other long-term assets” in the company’s consolidated balance sheets. At December 31, 2015, the amount reclassified was $1.8 million. The new guidance has been applied on a retrospective basis whereby prior-period financial statements have been adjusted to reflect the application of the new guidance, as required by the FASB. Effective January 1, 2016, the company adopted new guidance issued by the FASB that simplifies the measurement of inventory. The new guidance states that an entity should measure inventory at the lower of cost and net realizable value. Net realizable value is the estimate of estimated selling prices in the ordinary course of business, less reasonably predictable costs of completion, disposal and transportation. When evidence exists that the net realizable value of inventory is lower than its cost, the difference shall be recognized as a loss in the period in which it occurs. That loss may be required, for example, due to damage, physical deterioration, obsolescence, changes in price levels, or other causes. Adoption of this new guidance had no impact on the company’s consolidated results of operations and financial position. Effective January 1, 2016, the company adopted new guidance issued by the FASB that simplifies the balance sheet classification of deferred income taxes. The new guidance requires that deferred tax liabilities and assets be classified as noncurrent in a classified statement of financial position. The new guidance also requires companies to offset all deferred tax assets and liabilities (and valuation allowances) for each tax-paying jurisdiction within each tax-paying component. The net deferred tax must be presented as a single noncurrent amount. Previous guidance required an entity to separate deferred income tax liabilities and assets into current and noncurrent amounts in a classified statement of financial position. The new guidance has been applied on a retrospective basis whereby prior-period financial statements have been adjusted to reflect the application of the new guidance. At December 31, 2015, the reclassification resulted in a reduction of current deferred income tax assets of $24.1 million, a decrease in other current assets of $0.1 million, an increase in noncurrent deferred income tax assets of $12.9 million, a decrease in other long-term assets of $0.1 million, a decrease in current other accrued liabilities of $9.4 million and a decrease in other long-term liabilities of $2.0 million. Effective January 1, 2016, the company adopted new guidance issued by the FASB that removes the requirement to categorize within the fair value hierarchy and make certain disclosures for all investments that are eligible to be measured at fair value using the net asset value per share practical expedient. The new guidance has been applied on a retrospective basis whereby prior-period disclosures have been adjusted to reflect the application of the new guidance. Adoption of this new guidance had no impact on the company’s consolidated results of operations and financial position. Effective for the annual reporting period ended December 31, 2016, the company adopted new guidance issued by the FASB which requires management to evaluate whether there is substantial doubt about an entity's ability to continue as a going concern for each annual and interim reporting period. If substantial doubt exists, additional disclosure is required. Adoption of this new guidance had no impact on the company's consolidated results of operations and financial position. In January 2017, the FASB issued new guidance which simplifies how an entity is required to test goodwill for impairment by eliminating Step 2 from the goodwill impairment test. Step 2 measures a goodwill impairment loss by comparing the implied fair value of a reporting unit's goodwill with the carrying amount of that goodwill. Under the amended guidance, an entity will perform its annual or interim goodwill impairment test by comparing the fair value of a reporting unit with its carrying amount. An impairment charge will be recognized for the amount by which the carrying amount exceeds the reporting unit’s fair value. The guidance is effective for annual reporting periods beginning after December 15, 2019, with early adoption permitted for interim or annual goodwill impairment tests performed on testing dates after January 1, 2017. The company will adopt the new guidance on January 1, 2017. The company does not expect the adoption to have a material impact on its consolidated results of operations and financial position. In October 2016, the FASB issued new guidance which reduces the complexity in the accounting standards by allowing the recognition of current and deferred income taxes for an intra-entity asset transfer, other than inventory, when the transfer occurs. Historically, recognition of the income tax consequence was not recognized until the asset was sold to an outside party. This amendment should be applied on a modified retrospective basis through a cumulative-effect adjustment directly to retained earnings as of the beginning of the period of adoption. This update is effective for annual periods beginning after December 15, 2017, and interim periods within those fiscal years, with earlier adoption permitted. The company will adopt the new guidance on January 1, 2017. The company does not expect the adoption to have a material impact on its consolidated results of operations and financial position. In August 2016, the FASB issued new guidance which clarifies the treatment of several cash flow categories. In addition, the guidance also clarifies that when cash receipts and cash payments have aspects of more than one class of cash flows and cannot be separated, classification will depend on the predominant source or use. This update is effective for annual periods beginning after December 15, 2017, and interim periods within those fiscal years, with early adoption permitted, including adoption in an interim period. The company will adopt the new guidance on January 1, 2017. The company does not expect the adoption to have a material impact on its consolidated statements of cash flows. In June 2016, the FASB issued new guidance that introduces a new model for recognizing credit losses on financial instruments based on an estimate of current expected losses. This includes trade and other receivables, loans and other financial instruments. This update is effective for annual periods beginning after December 15, 2019, with earlier adoption permitted. The company is currently assessing when it will choose to adopt, and is currently evaluating the impact of the adoption on its consolidated financial statements. In March 2016, the FASB issued new guidance that will change certain aspects of accounting for share-based payments to employees. The new guidance will require all income tax effects of awards to be recognized in the income statement when the awards vest or are settled. It also will allow an employer to repurchase more of an employee’s shares than it can today for tax withholding purposes without triggering liability accounting and to make a policy election to account for forfeitures as they occur. The guidance is effective for annual reporting periods beginning after December 15, 2016. The company will adopt the new guidance on January 1, 2017. The company does not expect the adoption to have a material impact on its consolidated results of operations and financial position. In February 2016, the FASB issued a new lease accounting standard entitled “Leases.” The new standard is intended to improve financial reporting about leasing transactions. The new rule will require organizations that lease assets, referred to as lessees, to recognize on the balance sheet the assets and liabilities for the rights and obligations created by those leases. The standard requires disclosures to help investors and other financial statement users better understand the amount, timing and uncertainty of cash flows arising from leases. The standard is effective for annual reporting periods beginning after December 15, 2018, which for the company is January 1, 2019. Earlier adoption is permitted. The company is currently assessing when it will choose to adopt, and is currently evaluating the impact of the adoption on its consolidated results of operations and financial position. In 2014, the FASB issued a new revenue recognition standard entitled “Revenue from Contracts with Customers.” The objective of the standard is to establish the principles that an entity shall apply to report useful information to users of financial statements about the nature, amount, timing, and uncertainty of revenue and cash flows from a contract with a customer. The standard, and its various amendments, is effective for annual reporting periods beginning after December 15, 2017, which for the company is January 1, 2018. Earlier application is permitted only as of annual reporting periods beginning after December 15, 2016, which for the company in January 1, 2017. The standard allows for either “full retrospective” adoption, meaning the standard is applied to all periods presented, or “modified retrospective” adoption, meaning the standard is applied only to the most current period presented in the financial statements. Generally the new standard would require the company to recognize revenue for certain transactions, including extended payment term software licenses and short-term software licenses, sooner than the current rules would allow. The company will adopt the standard on January 1, 2018 using the modified retrospective method. The company is currently evaluating the impact the adoption of this new standard will have on its consolidated results of operations and financial position and currently does not believe that there will be a material impact upon adoption or on a go-forward basis. However, the final impact cannot be determined until the end of 2017 and it will be impacted by transactions entered into during 2017.

Recent accounting pronouncements and accounting changes

Effective January 1, 2016, the company adopted new guidance issued by the Financial Accounting Standards Board ("FASB") on the presentation of debt issuance costs. The new guidance requires that debt issuance costs shall be reported in the balance sheet as a direct deduction from the face amount of that debt. Previously the company reported these costs in “Other long-term assets” in the company’s consolidated balance sheets. At December 31, 2015, the amount reclassified was $1.8 million. The new guidance has been applied on a retrospective basis whereby prior-period financial statements have been adjusted to reflect the application of the new guidance, as required by the FASB.

Effective January 1, 2016, the company adopted new guidance issued by the FASB that simplifies the measurement of inventory. The new guidance states that an entity should measure inventory at the lower of cost and net realizable value. Net realizable value is the estimate of estimated selling prices in the ordinary course of business, less reasonably predictable costs of completion, disposal and transportation. When evidence exists that the net realizable value of inventory is lower than its cost, the difference shall be recognized as a loss in the period in which it occurs. That loss may be required, for example, due to damage, physical deterioration, obsolescence, changes in price levels, or other causes. Adoption of this new guidance had no impact on the company’s consolidated results of operations and financial position.

Effective January 1, 2016, the company adopted new guidance issued by the FASB that simplifies the balance sheet classification of deferred income taxes. The new guidance requires that deferred tax liabilities and assets be classified as noncurrent in a classified statement of financial position. The new guidance also requires companies to offset all deferred tax assets and liabilities (and valuation allowances) for each tax-paying jurisdiction within each tax-paying component. The net deferred tax must be presented as a single noncurrent amount. Previous guidance required an entity to separate deferred income tax liabilities and assets into current and noncurrent amounts in a classified statement of financial position. The new guidance has been applied on a retrospective basis whereby prior-period financial statements have been adjusted to reflect the application of the new guidance. At December 31, 2015, the reclassification resulted in a reduction of current deferred income tax assets of $24.1 million, a decrease in other current assets of $0.1 million, an increase in noncurrent deferred income tax assets of $12.9 million, a decrease in other long-term assets of $0.1 million, a decrease in current other accrued liabilities of $9.4 million and a decrease in other long-term liabilities of $2.0 million.

Effective January 1, 2016, the company adopted new guidance issued by the FASB that removes the requirement to categorize within the fair value hierarchy and make certain disclosures for all investments that are eligible to be measured at fair value using the net asset value per share practical expedient. The new guidance has been applied on a retrospective basis whereby prior-period disclosures have been adjusted to reflect the application of the new guidance. Adoption of this new guidance had no impact on the company’s consolidated results of operations and financial position.

Effective for the annual reporting period ended December 31, 2016, the company adopted new guidance issued by the FASB which requires management to evaluate whether there is substantial doubt about an entity's ability to continue as a going concern for each annual and interim reporting period. If substantial doubt exists, additional disclosure is required. Adoption of this new guidance had no impact on the company's consolidated results of operations and financial position.

In January 2017, the FASB issued new guidance which simplifies how an entity is required to test goodwill for impairment by eliminating Step 2 from the goodwill impairment test. Step 2 measures a goodwill impairment loss by comparing the implied fair value of a reporting unit's goodwill with the carrying amount of that goodwill. Under the amended guidance, an entity will perform its annual or interim goodwill impairment test by comparing the fair value of a reporting unit with its carrying amount. An impairment charge will be recognized for the amount by which the carrying amount exceeds the reporting unit’s fair value. The guidance is effective for annual reporting periods beginning after December 15, 2019, with early adoption permitted for interim or annual goodwill impairment tests performed on testing dates after January 1, 2017. The company will adopt the new guidance on January 1, 2017. The company does not expect the adoption to have a material impact on its consolidated results of operations and financial position.

In October 2016, the FASB issued new guidance which reduces the complexity in the accounting standards by allowing the recognition of current and deferred income taxes for an intra-entity asset transfer, other than inventory, when the transfer occurs. Historically, recognition of the income tax consequence was not recognized until the asset was sold to an outside party. This amendment should be applied on a modified retrospective basis through a cumulative-effect adjustment directly to retained earnings as of the beginning of the period of adoption. This update is effective for annual periods beginning after December 15, 2017, and interim periods within those fiscal years, with earlier adoption permitted. The company will adopt the new guidance on January 1, 2017. The company does not expect the adoption to have a material impact on its consolidated results of operations and financial position.

In August 2016, the FASB issued new guidance which clarifies the treatment of several cash flow categories. In addition, the guidance also clarifies that when cash receipts and cash payments have aspects of more than one class of cash flows and cannot be separated, classification will depend on the predominant source or use. This update is effective for annual periods beginning after December 15, 2017, and interim periods within those fiscal years, with early adoption permitted, including adoption in an interim period. The company will adopt the new guidance on January 1, 2017. The company does not expect the adoption to have a material impact on its consolidated statements of cash flows.

In June 2016, the FASB issued new guidance that introduces a new model for recognizing credit losses on financial instruments based on an estimate of current expected losses. This includes trade and other receivables, loans and other financial instruments. This update is effective for annual periods beginning after December 15, 2019, with earlier adoption permitted. The company is currently assessing when it will choose to adopt, and is currently evaluating the impact of the adoption on its consolidated financial statements.

In March 2016, the FASB issued new guidance that will change certain aspects of accounting for share-based payments to employees. The new guidance will require all income tax effects of awards to be recognized in the income statement when the awards vest or are settled. It also will allow an employer to repurchase more of an employee’s shares than it can today for tax withholding purposes without triggering liability accounting and to make a policy election to account for forfeitures as they occur. The guidance is effective for annual reporting periods beginning after December 15, 2016. The company will adopt the new guidance on January 1, 2017. The company does not expect the adoption to have a material impact on its consolidated results of operations and financial position.

In February 2016, the FASB issued a new lease accounting standard entitled “Leases.” The new standard is intended to improve financial reporting about leasing transactions. The new rule will require organizations that lease assets, referred to as lessees, to recognize on the balance sheet the assets and liabilities for the rights and obligations created by those leases. The standard requires disclosures to help investors and other financial statement users better understand the amount, timing and uncertainty of cash flows arising from leases. The standard is effective for annual reporting periods beginning after December 15, 2018, which for the company is January 1, 2019. Earlier adoption is permitted. The company is currently assessing when it will choose to adopt, and is currently evaluating the impact of the adoption on its consolidated results of operations and financial position.

In 2014, the FASB issued a new revenue recognition standard entitled “Revenue from Contracts with Customers.” The objective of the standard is to establish the principles that an entity shall apply to report useful information to users of financial statements about the nature, amount, timing, and uncertainty of revenue and cash flows from a contract with a customer. The standard, and its various amendments, is effective for annual reporting periods beginning after December 15, 2017, which for the company is January 1, 2018. Earlier application is permitted only as of annual reporting periods beginning after December 15, 2016, which for the company in January 1, 2017. The standard allows for either “full retrospective” adoption, meaning the standard is applied to all periods presented, or “modified retrospective” adoption, meaning the standard is applied only to the most current period presented in the financial statements. Generally the new standard would require the company to recognize revenue for certain transactions, including extended payment term software licenses and short-term software licenses, sooner than the current rules would allow. The company will adopt the standard on January 1, 2018 using the modified retrospective method. The company is currently evaluating the impact the adoption of this new standard will have on its consolidated results of operations and financial position and currently does not believe that there will be a material impact upon adoption or on a go-forward basis. However, the final impact cannot be determined until the end of 2017 and it will be impacted by transactions entered into during 2017.