Stock-Based Compensation (Schedule of Share-based Compensation, Restricted Stock and Restricted Stock Units Activity) (Details) - Restricted Stock [Member]	9 Months Ended	12 Months Ended
	Sep. 30, 2019 $ / shares shares	Dec. 31, 2018 $ / shares shares
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Nonvested, Number of Shares [Roll Forward]
Beginning period, nonvested number of shares (in shares) | shares	25,473	32,809
Number of shares, granted (in shares) | shares	3,584	10,662
Number of shares, vested (in shares) | shares	(16,245)	(17,607)
Number of shares, cancelled (in shares) | shares	0	(391)
Ending period, nonvested number of shares (in shares) | shares	12,812	25,473
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Nonvested, Weighted Average Grant Date Fair Value [Abstract]
Beginning period, weighted average grant date fair value, nonvested number of shares (in dollars per share) | $ / shares	$ 28.76	$ 22.61
Weighted average grant date fair value, granted (in dollars per share) | $ / shares	30.00	36.43
Weighted average grant date fair value, vested (in dollars per share) | $ / shares	$ 24.21	$ 21.85
Weighted average grant date fair value, cancelled (in dollars per share) | $ / shares	0.00	27.69
Ending period, weighted average grant date fair value, nonvested number of shares (in dollars per share) | $ / shares	$ 26.72	$ 28.76