Equity Compensation Plans and Share-Based Compensation - Warrants and Options Exercise Prices and Remaining Life (Details) shares in Thousands	12 Months Ended
	Dec. 31, 2018 $ / shares shares
Schedule of Share-based Compensation, Shares Authorized under Stock Options Plans and Warrants, by Exercise Price [Line Items]
Options	80
Weighted-Average Remaining Life (years)	2 years 6 months
Currently Exercisable (shares)	30
Exercise Price, $38.00
Schedule of Share-based Compensation, Shares Authorized under Stock Options Plans and Warrants, by Exercise Price [Line Items]
Exercise Price | $ / shares	$ 38.00
Options	40
Weighted-Average Remaining Life (years)	2 years 10 months 24 days
Currently Exercisable (shares)	10
Exercise Price, $40.00
Schedule of Share-based Compensation, Shares Authorized under Stock Options Plans and Warrants, by Exercise Price [Line Items]
Exercise Price | $ / shares	$ 40.00
Options	40
Weighted-Average Remaining Life (years)	2 years
Currently Exercisable (shares)	20