Earnings Per Share Schedule of Earnings per Share, Basic and Diluted (Details) - shares shares in Thousands	12 Months Ended
	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
Earnings Per Share, Basic, by Common Class, Including Two Class Method [Line Items]
Weighted Average Number of Shares Outstanding, Basic	89,215	89,056	88,896
Weighted Average Number Diluted Shares Outstanding Adjustment	132	120	158
Weighted Average Number of Shares Outstanding, Diluted	89,347	89,176	89,054