Earnings Per Share (Tables)

9 Months Ended

Sep. 30, 2020

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,
	2020	2019	2020	2019
Weighted-average common shares outstanding—basic	89,509	89,372	89,476	89,346
Dilutive effect of potential common shares	—	222	153	209
Weighted-average common shares outstanding—diluted	89,509	89,594	89,629	89,555