Earnings Per Share (Tables)

12 Months Ended

Dec. 31, 2015

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,
	2015	2014	2013
Weighted average common shares outstanding—basic	84,180	78,180	76,821
Dilutive effect of potential common shares	161	2,314	567
Weighted average common shares outstanding—diluted	84,341	80,494	77,388