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Income Taxes | 6 Months Ended
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Jun. 30, 2018
Income Tax Disclosure [Abstract] |
Income Tax Disclosure [Text Block] | 6. Income Taxes The U.S. federal statutory tax rate was 21% for the three and six months ended June 30, 2018 and 35% for the three and six months ended June 30, 2017. The Company’s effective tax rate for the three and six months ended June 30, 2018 was 28.8% of pretax income, compared to the effective tax rate for the three and six months ended June 30, 2017 of 67.3% and 47.2%, respectively. The difference between the U.S. federal statutory tax rate and the Company’s effective tax rate for the three and six months ended June 30, 2018 was primarily due to state income taxes and the inability to utilize losses experienced in certain Canadian operations. The difference between the U.S. federal statutory tax rate and the Company’s effective tax rate for the three months ended June 30, 2017 was primarily caused by the inability to utilize losses experienced in certain Canadian operations . The difference between the U.S. federal statutory tax rate and the Company’s effective tax rate for the six months ended June 30, 2017 was caused by the inability to utilize losses experienced in certain Canadian operations, partially offset by excess tax benefits of approximately $1.0 million pertaining to the vesting of stock awards and the exercise of stock options. The Company had unrecognized tax benefits of approximately $0.4 million as of June 30, 2018 and $0.8 million as of December 31, 2017, which were included in other liabilities in the accompanying consolidated balance sheets. The Company’s policy is to recognize interest and penalties related to income tax liabilities as a component of income tax expense in the consolidated statements of operations. The amount of interest and penalties charged to income tax expense because of the unrecognized tax benefits was not significant for the three and six months ended June 30, 2018 and 2017. The Company is subject to taxation in various jurisdictions. The Company’s tax returns for 2015 and 2016 are subject to examination by U.S. federal authorities. The Company’s tax returns are subject to examination by various state authorities for the years 2013 through 2016.

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- Definition The entire disclosure for income taxes. Disclosures may include net deferred tax liability or asset recognized in an enterprise's statement of financial position, net change during the year in the total valuation allowance, approximate tax effect of each type of temporary difference and carryforward that gives rise to a significant portion of deferred tax liabilities and deferred tax assets, utilization of a tax carryback, and tax uncertainties information. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 740 -URI http://asc.fasb.org/topic&trid=2144680 + Details
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