Share-Based Compensation - Schedule of Stock Option Activity (Details) - Employee Stock Option [Member] - $ / shares shares in Thousands	12 Months Ended
	Dec. 31, 2016	Dec. 31, 2015	Dec. 31, 2014
Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding [Roll Forward]
Number of options outstanding, beginning balance (in shares)	1,394	1,640	2,991
Number of options, granted (in shares)	216	239	0
Number of options, exercised (in shares)	(934)	(484)	(1,347)
Number of options, forfeited (in shares)	(1)	(1)	(4)
Number of options outstanding, ending balance (in shares)	675	1,394	1,640
Number of options exercisable at end of year (in shares)	280	1,155	1,640
Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding, Weighted Average Exercise Price [Abstract]
Weighted average exercise price, beginning balance (in dollars per share)	$ 30.85	$ 28.91	$ 28.48
Weighted average exercise price options, granted (in dollars per share)	38.73	39.05	0.00
Weighted average exercise price options, exercised (in dollars per share)	33.61	28.33	27.97
Weighted average exercise price options, forfeited (in dollars per share)	29.11	25.78	25.45
Weighted average exercise price, ending balance (in dollars per share)	29.55	30.85	28.91
Weighted average exercise price, exercisable (in dollars per share)	$ 16.38	$ 29.16	$ 28.91