Earnings Per Share (Tables)

12 Months Ended

Dec. 31, 2016

Earnings Per Share [Abstract]

Schedule of Earnings Per Share, Basic and Diluted [Table Text Block]

The reconciliations of the denominators of the basic and diluted earnings per share computations are as follows (in thousands):

	Years Ended December 31,
	2016	2015	2014
Weighted average common shares outstanding—basic	88,896	84,180	78,180
Dilutive effect of potential common shares	158	161	2,314
Weighted average common shares outstanding—diluted	89,054	84,341	80,494