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Equity-Based Compensation Plans (Schedule of Information of Stock Options Outstanding) (Details)
12 Months Ended
Dec. 31, 2017
$ / shares
shares
Options outstanding | shares 38,689
Weighted-average remaining contractual, outstanding 8 months 12 days
Weighted-average exercise price | $ / shares $ 16.09
Options exercisable | shares 38,689
Weighted-average exercise price | $ / shares $ 16.09
$13.27 to $15.48 [Member]  
Options outstanding | shares 9,000
Weighted-average remaining contractual, outstanding 1 year 15 days
Weighted-average exercise price | $ / shares $ 14.35
Options exercisable | shares 9,000
Weighted-average exercise price | $ / shares $ 14.35
$15.48 to $17.70 [Member]  
Options outstanding | shares 29,689
Weighted-average remaining contractual, outstanding 4 months 24 days
Weighted-average exercise price | $ / shares $ 16.61
Options exercisable | shares 29,689
Weighted-average exercise price | $ / shares $ 16.61