Income Taxes	3 Months Ended
Mar. 31, 2016
Income Tax Disclosure [Abstract]
Income Taxes	5. Income Taxes The effective income tax rate for the three months ended March 31, 2016 and 2015, was 34.7% and 34.1%, respectively. Total income tax expense for the three months ended March 31, 2016, differed from the amount computed by applying the U.S. federal statutory tax rate to pre-tax income due primarily to a tax shortfall related to share-based compensation of $0.2 million and state taxes. Total income tax expense for the three months ended March 31, 2015, differed from the amount computed by applying the U.S. federal statutory tax rate to pre-tax income due primarily to a tax shortfall related to share-based compensation of $0.2 million and state taxes.

Income Taxes

3 Months Ended

Mar. 31, 2016

5. Income Taxes

The effective income tax rate for the three months ended March 31, 2016 and 2015, was 34.7% and 34.1%, respectively. Total income tax expense for the three months ended March 31, 2016, differed from the amount computed by applying the U.S. federal statutory tax rate to pre-tax income due primarily to a tax shortfall related to share-based compensation of $0.2 million and state taxes. Total income tax expense for the three months ended March 31, 2015, differed from the amount computed by applying the U.S. federal statutory tax rate to pre-tax income due primarily to a tax shortfall related to share-based compensation of $0.2 million and state taxes.