Income Taxes	3 Months Ended
Mar. 31, 2018
Income Tax Disclosure [Abstract]
Income Taxes	Income Taxes The total amount of unrecognized tax benefits that would affect the effective tax rate if recognized was $0.95 million at March 31, 2018 and $0.72 million at December 31, 2017. Interest and penalties are recognized through the income tax provision. For the three months ended March 31, 2018 and 2017, the Company recognized $0.01 million and $0.00 million in interest or penalties, respectively. There was $0.10 million and $0.09 million in accrued interest and penalties at March 31, 2018 and December 31, 2017, respectively. Tax years that remain open and subject to audit include the federal 2014-2017 years and the Indiana 2014-2017 years. The Company does not anticipate a significant change in the amount of uncertain tax positions within the next 12 months. The Tax Cuts and Jobs Act was enacted on December 22, 2017. The Act reduces the U.S. federal corporate tax rate from 35% to 21%, effective January 1, 2018. At March 31, 2018 and December 31, 2017, the Company had not completed its accounting for the tax effects of enactment of the Act; however, in certain cases, as described below, the Company made a reasonable estimate of the effects on its existing deferred tax balances. The Company will continue to make and refine its calculations as additional analysis is completed. In addition, the Company's estimates may also be affected as it gains a more thorough understanding of the tax law. Provisional amounts Deferred tax assets and liabilities: The Company remeasured certain deferred tax assets and liabilities based on the rates at which it expects to reverse in the future, which is generally 21%. However, the Company is still analyzing certain aspects of the Act and refining its calculations, which could potentially affect the measurement of these balances or potentially give rise to new deferred tax amounts. The provisional amount recorded related to the remeasurement of its deferred tax balance was a benefit of $2.61 million, which was included as a component of Income Tax Expense in the December 31, 2017 Consolidated Statements of Income and decreased the effective rate by 2.6%. Further, at March 31, 2018 and December 31, 2017, the Company was unable to fully revalue the deferred tax liabilities associated with its partnership investments in renewable energy and affordable housing and estimated the deferred tax liability associated with those projects to be $1.92 million. This estimation was necessary due to incomplete information for 2017 operations from those partnerships. Upon receipt of the partnership Form1065 K-1’s, the Company will complete the revaluation of those related deferred tax liabilities as provided by the U.S. Securities and Exchange Commission’s SAB No. 118, Income Tax Accounting Implications of the Tax Cuts and Jobs Act.

Income Taxes

The total amount of unrecognized tax benefits that would affect the effective tax rate if recognized was $0.95 million at March 31, 2018 and $0.72 million at December 31, 2017. Interest and penalties are recognized through the income tax provision. For the three months ended March 31, 2018 and 2017, the Company recognized $0.01 million and $0.00 million in interest or penalties, respectively. There was $0.10 million and $0.09 million in accrued interest and penalties at March 31, 2018 and December 31, 2017, respectively.

Tax years that remain open and subject to audit include the federal 2014-2017 years and the Indiana 2014-2017 years. The Company does not anticipate a significant change in the amount of uncertain tax positions within the next 12 months.

The Tax Cuts and Jobs Act was enacted on December 22, 2017. The Act reduces the U.S. federal corporate tax rate from 35% to 21%, effective January 1, 2018. At March 31, 2018 and December 31, 2017, the Company had not completed its accounting for the tax effects of enactment of the Act; however, in certain cases, as described below, the Company made a reasonable estimate of the effects on its existing deferred tax balances. The Company will continue to make and refine its calculations as additional analysis is completed. In addition, the Company's estimates may also be affected as it gains a more thorough understanding of the tax law.

Provisional amounts

Deferred tax assets and liabilities: The Company remeasured certain deferred tax assets and liabilities based on the rates at which it expects to reverse in the future, which is generally 21%. However, the Company is still analyzing certain aspects of the Act and refining its calculations, which could potentially affect the measurement of these balances or potentially give rise to new deferred tax amounts. The provisional amount recorded related to the remeasurement of its deferred tax balance was a benefit of $2.61 million, which was included as a component of Income Tax Expense in the December 31, 2017 Consolidated Statements of Income and decreased the effective rate by 2.6%.

Further, at March 31, 2018 and December 31, 2017, the Company was unable to fully revalue the deferred tax liabilities associated with its partnership investments in renewable energy and affordable housing and estimated the deferred tax liability associated with those projects to be $1.92 million. This estimation was necessary due to incomplete information for 2017 operations from those partnerships. Upon receipt of the partnership Form1065 K-1’s, the Company will complete the revaluation of those related deferred tax liabilities as provided by the U.S. Securities and Exchange Commission’s SAB No. 118, Income Tax Accounting Implications of the Tax Cuts and Jobs Act.