Stock-Based Compensation (Tables)

12 Months Ended

Dec. 31, 2015

Stock-Based Compensation [Abstract]

Schedule Of Activity For Non-Vested Restricted Sock

	2015			2014			2013
	Shares	Weighted Average Fair Value at Grant Date		Shares	Weighted Average Fair Value at Grant Date		Shares	Weighted Average Fair Value at Grant Date
Non-vested at beginning of period	23,668	$	79.02	16,301	$	84.96	8,393	$	96.28
Granted	5,779		84.90	7,367		65.87	8,102		73.28
Vested	(2,570)		103.65	0			0
Forfeited	(290)		78.12	0			(194)		86.97
Non-vested at end of period	26,587	$	78.02	23,668	$	79.02	16,301	$	84.96