Stock Compensation Plans (Details 1) - USD ($) $ / shares in Units, $ in Thousands	12 Months Ended
	Dec. 31, 2015	Dec. 31, 2014
Options - Outstanding, Beginning Balance (in shares)	76,750
Options - Granted (in shares)	0
Options - Exercised (in shares)	(3,750)	(2,500)
Options - Forfeited (in shares)	0
Options - Outstanding, Ending Balance (in shares)	73,000	76,750
Options - Exercisable (in shares)	73,000
Weighted-Average Exercise Price - Outstanding, Beginning Balance (in dollars per share)	$ 25.16
Weighted-Average Exercise Price - Granted (in dollars per share)	0
Weighted-Average Exercise Price - Exercised (in dollars per share)	14.41
Weighted-Average Exercise Price - Forfeited (in dollars per share)	0
Weighted-Average Exercise Price - Outstanding, Ending Balance (in dollars per share)	25.71	$ 25.16
Weighted-Average Exercise Price - Exercisable (in dollars per share)	$ 25.71
Aggregate Intrinsic Value - Outstanding, Beginning Balance	$ 54,720
Aggregate Intrinsic Value - Granted	0
Aggregate Intrinsic Value - Exercised	0
Aggregate Intrinsic Value - Forfeited	0
Aggregate Intrinsic Value - Outstanding, Ending Balance	9,000	$ 54,720
Aggregate Intrinsic Value - Exercisable	$ 9,000
Weighted-Average Remaining Term - Outstanding (in years)	1 year 7 months 6 days	2 years 8 months 12 days
Weighted-Average Remaining Term - Granted (in years)	0 years
Weighted-Average Remaining Term - Exercised (in years)	0 years
Weighted-Average Remaining Term - Forfeited (in years)	0 years
Weighted-Average Remaining Term - Exercisable (in years)	1 year 7 months 6 days