Earnings Per Share (Tables)

9 Months Ended

Sep. 30, 2019

Earnings Per Share, Diluted, by Common Class, Including Two Class Method [Line Items]

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

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

	Three Months Ended September 30,		Nine Months Ended September 30,
	2019	2018	2019	2018
Weighted-average common shares outstanding—basic	89,372	89,239	89,346	89,205
Dilutive effect of potential common shares	222	—	209	—
Weighted-average common shares outstanding—diluted	89,594	89,239	89,555	89,205