Income Taxes - (Tables)

6 Months Ended

Jun. 30, 2017

Income Taxes [Abstract]

Schedule of effective tax rate [Table Text Block]

The following table provides details of income taxes:

	Three Months Ended						Six Months Ended
	June 30,						June 30,
	2017			2016			2017			2016
Income before income taxes	$	12,752		$	10,593		$	22,359		$	30,154
Provision for income taxes	$	3,559		$	2,992		$	6,015		$	8,614
Effective tax rate	27.9		%	28.2		%	26.9		%	28.6		%