Earnings Per Share (Tables)

3 Months Ended

Mar. 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):

	Three Months Ended March 31,
	2015	2014
Weighted-average common shares outstanding—basic	78,271	78,992
Dilutive effect of potential common shares	3,195	1,164
Weighted-average common shares outstanding—diluted	81,466	80,156