Shareholders' Equity - Share-based Compensation, Stock Option Activity (Details) - ACS Member - Stock Options [Member] - $ / shares shares in Thousands		12 Months Ended
		Dec. 31, 2016	Dec. 31, 2015	Dec. 31, 2014
Awards, Stock Options, Number of Shares [Roll Forward]
Outstanding at January 1, Shares		3,119	6,115	14,199
Cancelled/expired, Shares		(392)	(405)	(215)
Exercised, Shares		(1,225)	(2,591)	(7,869)
Outstanding at December 31, Shares		0	3,119	6,115
Exercisable, Shares		0	3,119	6,115
Awards, Stock Options, Weighted Average Exercise Price [Roll Forward]
Outstanding at January 1, Weighted Average	[1]	$ 6.87	$ 7.00	$ 6.95
Cancelled/expired, Weighted Average	[1]	6.99	7.43	6.95
Exercised, Weighted Average	[1]	7.03	7.09	6.92
Outstanding at December 31, Weighted Average	[1]	0.00	6.87	7.00
Exercisable, Weighted Average	[1]	$ 0.00	$ 6.87	$ 7.00

[1] Exercise Price for Stock Options.