Income Taxes	6 Months Ended
Jun. 30, 2017
Income Tax Disclosure [Abstract]
Income Taxes	Income Taxes For the three months ended June 30, 2017, the Company recognized an income tax expense of $10.7 million on pre-tax earnings of $28.0 million compared to $4.9 million income tax expense on pre-tax earnings of $12.3 million for the three months ended June 30, 2016. For the six months ended June 30, 2017, the Company recognized income tax expense of $14.0 million on pre-tax earnings of $38.0 million compared to income tax expense of $5.8 million on pre-tax earnings of $13.8 million for the six months ended June 30, 2016. The effective tax rate was approximately was 36.9% for the six months ended June 30, 2017 compared to approximately 42.2% for the six months ended June 30, 2016. The effective tax rate for the six months ended June 30, 2017 was lower than the six months ended June 30, 2016 primarily due to the adoption of ASU 2016-09 and the related excess tax benefits now recognized as a reduction of income tax expense ($0.6 million) and a reduction of income tax expense related to the benefit realized on the settlement of certain income tax related matters with a local tax jurisdiction ($0.2 million).The effective tax rate for the three months ended June 30, 2016 was higher than the expected statutory tax rate due to a write-off of a deferred tax asset ($0.2 million) for certain state net operating losses. As of June 30, 2017, the Company has not identified any uncertain tax positions that would have a material impact on the Company’s financial position. The Company recognizes potential interest and penalties related to uncertain tax positions, if any, in income tax expense. The tax years that remain subject to examination for the Company’s major tax jurisdictions at June 30, 2017 are shown below: 2013 – 2016 United States — federal income tax 2007 – 2016 United States — state and local income tax 2013 – 2016 Canada and Puerto Rico Adoption of ASU 2016-09 Refer to Note 1. Significant Accounting Policies and Practices for the impact of adopting ASU 2016-09 on the Company's stock-based compensation, income taxes, and net income per common share.

Income Taxes

For the three months ended June 30, 2017, the Company recognized an income tax expense of $10.7 million on pre-tax earnings of $28.0 million compared to $4.9 million income tax expense on pre-tax earnings of $12.3 million for the three months ended June 30, 2016. For the six months ended June 30, 2017, the Company recognized income tax expense of $14.0 million on pre-tax earnings of $38.0 million compared to income tax expense of $5.8 million on pre-tax earnings of $13.8 million for the six months ended June 30, 2016. The effective tax rate was approximately was 36.9% for the six months ended June 30, 2017 compared to approximately 42.2% for the six months ended June 30, 2016. The effective tax rate for the six months ended June 30, 2017 was lower than the six months ended June 30, 2016 primarily due to the adoption of ASU 2016-09 and the related excess tax benefits now recognized as a reduction of income tax expense ($0.6 million) and a reduction of income tax expense related to the benefit realized on the settlement of certain income tax related matters with a local tax jurisdiction ($0.2 million).The effective tax rate for the three months ended June 30, 2016 was higher than the expected statutory tax rate due to a write-off of a deferred tax asset ($0.2 million) for certain state net operating losses.

As of June 30, 2017, the Company has not identified any uncertain tax positions that would have a material impact on the Company’s financial position. The Company recognizes potential interest and penalties related to uncertain tax positions, if any, in income tax expense.

The tax years that remain subject to examination for the Company’s major tax jurisdictions at June 30, 2017 are shown below:

2013 – 2016 United States — federal income tax

2007 – 2016 United States — state and local income tax

2013 – 2016 Canada and Puerto Rico

Adoption of ASU 2016-09

Refer to Note 1. Significant Accounting Policies and Practices for the impact of adopting ASU 2016-09 on the Company's stock-based compensation, income taxes, and net income per common share.