Earnings Per Share - Reconciliation of Weighted Average Share Amounts Used to Compute Basic and Diluted Earnings (Loss) Per Share (Details) - shares shares in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2020	Sep. 30, 2019	Sep. 30, 2020	Sep. 30, 2019
Weighted average shares outstanding:
Basic weighted average shares outstanding (in shares)	116,558	116,169	116,217	116,337
Add: Dilutive effect of stock options and RSUs (in shares)	1,246	2,138	1,427	2,123
Diluted weighted average shares outstanding (in shares)	117,804	118,307	117,644	118,460