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Income Taxes	6 Months Ended
Income Taxes	Jun. 30, 2016
Income Taxes [Abstract]
Income Taxes	D. Income Taxes The effective tax rate ("ETR) for the three months ended June 30, 2016 and June 30, 2015 was 37.7% and 37.0%, respectively. The ETR for the six months ended June 30, 2016 and June 30, 2015 was 37.9% and 37.4%, respectively.