Share Based Compensation - Stock Options Activity (Details) - USD ($) $ / shares in Units, $ in Thousands	12 Months Ended
	Dec. 31, 2019	Dec. 31, 2018
Number of Shares
Options granted (in shares)	0	0
Stock Options
Number of Shares
Options exercisable, beginning balance (in shares)	52,000
Options outstanding, beginning balance (in shares)	56,000
Options granted (in shares)	0
Options forfeited (in shares)	(1,000)
Options expired (in shares)	(1,000)
Options exercised (in shares)	0
Options outstanding, ending balance (in shares)	54,000	56,000
Options exercisable, ending balance (in shares)	53,000	52,000
Weighted- Average Exercise Price per Share
Options exercisable, weighted-average exercise price per share, beginning balance (usd per share)	$ 31.84
Options outstanding, weighted-average exercise price per share, beginning balance (usd per share)	33.05
Options granted, weighted-average exercise price per share (usd per share)	0.00
Options forfeited, weighted average exercise price per share (usd per share)	51.20
Options expired, weighted average exercise price per share (usd per share)	35.06
Options exercised, weighted average exercise price per share (usd per share)	0.00
Options exercisable, weighted-average exercise price per share, ending balance (usd per share)	32.41	$ 31.84
Options outstanding, weighted-average exercise price per share, ending balance (usd per share)	$ 32.93	$ 33.05
Options outstanding , weighted average remaining contractual term (in years)	1 year 8 months 5 days
Options exercisable, weighted average remaining contractual term (in years)	1 year 7 months 10 days
Options outstanding, aggregate intrinsic value	$ 0
Options exercisable, aggregate intrinsic value	$ 0