Employee Benefit Plans (Tables)

12 Months Ended

Dec. 31, 2016

Defined Contribution Pension and Other Postretirement Plans Disclosure [Abstract]

Matching contributions [Table Text Block]

The table below sets forth our matching contributions for the past three years (in thousands):

	2016		2015		2014
Matching contributions - defined contribution plans	$	5,817	$	5,583	$	5,235
Matching contributions - deferred compensation plan	194		218		233