Income Taxes Income Taxes (table 2)

9 Months Ended

Sep. 30, 2017

Income Tax Disclosure [Abstract]

Schedule of Components of Income Tax Expense (Benefit) [Table Text Block]

The provision for income taxes was as follows:

	Three Months Ended September 30,						Nine Months Ended September 30,
	2017			2016			2017			2016
Income tax provision	$	21,004		$	16,575		$	46,124		$	85,555
Effective tax rate	24.8		%	22.0		%	22.6		%	44.9		%