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Income Taxes
6 Months Ended
Jun. 30, 2017
Income Tax Disclosure [Abstract]  
Income Tax Disclosure [Text Block]
Income Taxes
During the three and six months ended June 30, 2017, the Company recorded a tax provision of $8.2 million and $17.6 million, respectively, which reflects income tax expense related to the period’s income before income taxes. The effective tax rate for the three and six months ended June 30, 2017 was 32.5% and 34.3%, respectively, which included tax expense related to the expected tax benefits for the domestic production activities deduction and excess tax benefits from employee share-based payment transactions exercised during the second quarter of 2017 per ASU 2016-09. During the three and six months ended June 30, 2016, the Company recorded a tax provision of $9.0 million and $14.6 million, respectively, which reflects income tax expense related to the period’s income before income taxes. The effective tax rate for the three and six months ended June 30, 2016 was 36.2% and 36.7%, respectively, which included tax expense related to the expected tax benefits for the domestic production activities deduction and energy tax credits.
During 2016, the Company fully utilized its federal NOL carryforwards and federal credit carryforwards. The Company had $4.7 million of state NOL carryforwards, net of the federal benefit, at June 30, 2017. Our state NOLs may be carried forward from one to 16 years, depending on the tax jurisdiction, with $1.3 million expiring between 2022 and 2027 and $3.4 million expiring between 2028 and 2032, absent sufficient state taxable income.