Earnings Per Share (Narrative) (Details)	12 Months Ended
	Dec. 31, 2016 item shares	Dec. 31, 2015 shares	Dec. 31, 2014 shares
Earnings Per Share, Basic, by Common Class, Including Two Class Method [Line Items]
Number of active share-based compensation plans | item	2
Potentially dilutive common shares	6,896	7,240	5,540
Employee Stock Option [Member]
Earnings Per Share, Basic, by Common Class, Including Two Class Method [Line Items]
Potentially dilutive common shares	2,156	2,265	115
Stock-Settled Stock Appreciation Rights (SSARs) [Member]
Earnings Per Share, Basic, by Common Class, Including Two Class Method [Line Items]
Potentially dilutive common shares	0
Restricted Stock [Member]
Earnings Per Share, Basic, by Common Class, Including Two Class Method [Line Items]
Potentially dilutive common shares	4,740	4,975	5,425