Income Taxes Income Taxes (table 2)

6 Months Ended

Jun. 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 June 30,						Six Months Ended June 30,
	2017			2016			2017			2016
Income tax provision	$	12,127		$	14,485		$	25,120		$	68,980
Effective tax rate	19.1		%	24.2		%	21.1		%	59.7		%