New accounting standards (Policies)	3 Months Ended
Mar. 31, 2013
New Accounting Pronouncements, Policy	Amendment to Comprehensive Income: In February 2013, the Financial Accounting Standards Board (“FASB”) issued an amendment to its accounting guidance on reporting amounts reclassified out of accumulated other comprehensive income. The guidance requires an entity to report the effect of significant reclassifications out of accumulated other comprehensive income on the respective line items, on the face of the statement where net income is presented, or in the notes to the financial statements, if the amount being reclassified is required under GAAP to be reclassified in its entirety to net income in the same reporting period For other amounts that are not required under GAAP to be reclassified in their entirety to net income in the same reporting period, an entity is required to cross-reference to other disclosures required under GAAP that provide additional detail about the effect of the reclassifications. The guidance is effective prospectively for reporting periods beginning after December 15, 2012. Amendment to Balance Sheet: In January 2013, the FASB issued an amendment to its accounting guidance to clarify the scope of disclosure requirements pertaining to offsetting assets and liabilities mandated by an earlier accounting pronouncement. The amended guidance limited the scope of the required disclosures to derivatives accounted for in accordance with the FASB’s Derivatives and Hedging guidance, including bifurcated embedded derivatives, repurchase agreements and reverse repurchase agreements and certain securities borrowing and securities lending transactions, that are offset in the financial statements in accordance with specified accounting guidance or subject to an enforceable master netting arrangement or similar agreement. The disclosure requirements are no longer applicable to entities with other types of financial assets and financial liabilities subject to a master netting arrangement or similar agreement. The guidance is effective for reporting periods beginning on or after January 1, 2013. The amendment did not have a material impact on the Company’s results of operations, cash flows or financial position. Amendment to Foreign Currency Matters: In March 2013, the FASB issued an amendment which clarified that when a reporting entity ceases to have a controlling financial interest in a subsidiary or group of assets that is a business within a foreign entity, the reporting entity is required to reclassify cumulative foreign currency translation adjustment from accumulated other comprehensive income into the calculation of gain or loss related to that foreign entity. Additionally, the amendment clarifies that the sale of an investment in a foreign entity includes both (1) events that result in the loss of a controlling financial interest in a foreign entity (irrespective of any retained investment) and (2) events that result in an acquirer obtaining control of an acquiree in which it held an equity interest immediately before the acquisition date (sometimes also referred to as a step acquisition), and that the cumulative translation adjustment should be released into net income upon the occurrence of those events. The guidance is effective prospectively for reporting periods beginning after December 15, 2013. The amendment is not expected to have a material impact on the Company’s results of operations, cash flows or financial position.

Amendment to Comprehensive Income: In February 2013, the Financial Accounting Standards Board (“FASB”) issued an amendment to its accounting guidance on reporting amounts reclassified out of accumulated other comprehensive income. The guidance requires an entity to report the effect of significant reclassifications out of accumulated other comprehensive income on the respective line items, on the face of the statement where net income is presented, or in the notes to the financial statements, if the amount being reclassified is required under GAAP to be reclassified in its entirety to net income in the same reporting period For other amounts that are not required under GAAP to be reclassified in their entirety to net income in the same reporting period, an entity is required to cross-reference to other disclosures required under GAAP that provide additional detail about the effect of the reclassifications. The guidance is effective prospectively for reporting periods beginning after December 15, 2012.

Amendment to Balance Sheet: In January 2013, the FASB issued an amendment to its accounting guidance to clarify the scope of disclosure requirements pertaining to offsetting assets and liabilities mandated by an earlier accounting pronouncement. The amended guidance limited the scope of the required disclosures to derivatives accounted for in accordance with the FASB’s Derivatives and Hedging guidance, including bifurcated embedded derivatives, repurchase agreements and reverse repurchase agreements and certain securities borrowing and securities lending transactions, that are offset in the financial statements in accordance with specified accounting guidance or subject to an enforceable master netting arrangement or similar agreement. The disclosure requirements are no longer applicable to entities with other types of financial assets and financial liabilities subject to a master netting arrangement or similar agreement. The guidance is effective for reporting periods beginning on or after January 1, 2013. The amendment did not have a material impact on the Company’s results of operations, cash flows or financial position.

Amendment to Foreign Currency Matters: In March 2013, the FASB issued an amendment which clarified that when a reporting entity ceases to have a controlling financial interest in a subsidiary or group of assets that is a business within a foreign entity, the reporting entity is required to reclassify cumulative foreign currency translation adjustment from accumulated other comprehensive income into the calculation of gain or loss related to that foreign entity. Additionally, the amendment clarifies that the sale of an investment in a foreign entity includes both (1) events that result in the loss of a controlling financial interest in a foreign entity (irrespective of any retained investment) and (2) events that result in an acquirer obtaining control of an acquiree in which it held an equity interest immediately before the acquisition date (sometimes also referred to as a step acquisition), and that the cumulative translation adjustment should be released into net income upon the occurrence of those events. The guidance is effective prospectively for reporting periods beginning after December 15, 2013. The amendment is not expected to have a material impact on the Company’s results of operations, cash flows or financial position.