Share-Based Compensation (Summary of Stock Option Activity) (Details) - USD ($)	12 Months Ended
	Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2015
Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding [Roll Forward]
Options outstanding, beginning balance (in shares)	500,000
Granted (in shares)	0
Exercised (in shares)	0
Forfeited (in shares)	0
Options outstanding, ending balance (in shares)	500,000	500,000
Options exercisable (in shares)	300,000
Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding, Weighted Average Exercise Price [Abstract]
Options outstanding, beginning balance (in dollars per share)	$ 7.49
Granted (in dollars per share)	0.00
Exercised (in dollars per share)	0.00
Forfeited (in dollars per share)	0.00
Options outstanding, ending balance (in dollars per share)	7.49	$ 7.49
Options exercisable (in dollars per share)	$ 7.49
Options outstanding, weighted average remaining life (in years)	6 years 9 months 25 days
Options exercisable, weighted average remaining life (in years)	6 years 9 months 25 days
Options outstanding, aggregate intrinsic value	$ 1,905,000
Options exercisable, aggregate intrinsic value	1,143,000
Employee Stock Option [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Stock Issued During Period, Value, Stock Options Exercised	$ 0	$ 0	$ 0