Share-Based Compensation (Summary of Stock Option Activity) (Details)	12 Months Ended
	Dec. 31, 2019 $ / shares shares
Non-vested stock options outstanding, Number of shares
Non-vested stock options outstanding, beginning balance | shares	263,783
Stock options granted | shares	112,550
Stock options vested | shares	(103,697)
Stock options forfeited | shares	(19,900)
Non-vested stock options outstanding, ending balance | shares	252,736
Non-vested stock options outstanding, Weighted-average grant-date fair value
Non-vested stock options outstanding, Weighted-average grant-date fair value, beginning balance | $ / shares	$ 9.04
Stock options granted | $ / shares	6.71
Stock options vested | $ / shares	8.05
Stock options forfeited | $ / shares	8.60
Non-vested stock options outstanding, Weighted-average grant-date fair value, ending balance | $ / shares	$ 8.45
Stock options outstanding, Number of shares
Stock options outstanding, beginning balance | shares	862,025
Stock options granted | shares	112,550
Stock options exercised | shares	(5,325)
Stock options forfeited | shares	(72,450)
Stock options outstanding, ending balance | shares	896,800
Stock options outstanding, Weighted-average exercise price
Stock options outstanding, weighted-average exercise price, beginning balance | $ / shares	$ 22.56
Stock options granted | $ / shares	14.56
Stock options exercised | $ / shares	10.10
Stock options forfeited | $ / shares	17.99
Stock options outstanding, weighted-average exercise price, ending balance | $ / shares	$ 22.01
Stock options outstanding, weighted-average remaining contractual life	5 years 9 months 18 days
Stock options exercisable at end of period | shares	644,064
Stock options exercisable, weighted-average exercise price at end of period | $ / shares	$ 23.75
Stock options exercisable, weighted-average remaining contractual life	4 years 6 months