Equity Compensation and Employee Benefit Plans (Schedule of Equity Compensation Stock Options Activity) (Details) - USD ($) $ / shares in Units, shares in Thousands, $ in Thousands	12 Months Ended
	Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2015
Equity Compensation [Abstract]
Number of options outstanding at beginning of period	171
Number of options granted	0	0	0
Number of options exercised	(138)
Number of options forfeited	0
Number of options expired	0
Number of options outstanding at end of period	33	171
Number of options exercisable at end of period	33
Weighted average exercise price outstanding at beginning of period	$ 18.19
Weighted average exercise price options granted	0.00
Weighted average exercise price options exercised	17.83
Weighted average exercise price options forfeited	0.00
Weighted average exercise price options expired	0.00
Weighted average exercise price outstanding at end of period	19.69	$ 18.19
Weighted average exercise price exercisable at end of period	$ 19.69
Weighted average remaining contractual term outstanding at end of period, years	2 years 3 months 28 days
Weighted average remaining contractual term exercisable at end of period, years	2 years 3 months 28 days
Aggregate intrinsic value outstanding at end of period	$ 623
Aggregate intrinsic value exercisable at end of period	$ 623