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9. Income taxes
3 Months Ended
Mar. 31, 2017
Income Tax Disclosure [Abstract]  
Income taxes

For each interim period, the Company estimates the effective tax rate (“ETR”) expected to be applicable for the full year and applies that rate to income before provision for income taxes for the period. Additionally, the Company records discrete income tax items such as enacted tax rate changes and completed tax audits in the period in which they occur.

 

The effective tax rate for the three months ended March 31, 2017 was 39.2% compared to an ETR of 38.8% for the three months ended March 31, 2016.