Stock Based Compensation (Summary of Stock Option Activity) (Details) - USD ($) $ / shares in Units, $ in Thousands	6 Months Ended	12 Months Ended
	Jun. 30, 2016	Dec. 31, 2015
Stock-Based Compensation [Abstract]
Options, Outstanding, beginning of period	194,521
Options, Granted	0
Options, Exercised	(5,405)
Options, Forfeited	(16,019)
Options, Outstanding, end of period	173,097	194,521
Options, Exercisable, end of period	158,597
Weighted Average Exercise Price Per Share, Outstanding, beginning of period	$ 26.91
Weighted Average Exercise Price Per Share, Granted
Weighted Average Exercise Price Per Share, Exercised	26.42
Weighted Average Exercise Price Per Share, Forfeited	27.71
Weighted Average Exercise Price Per Share, Outstanding, end of period	26.85	$ 26.91
Weighted Average Exercise Price Per Share, Exercisable, end of period	$ 26.69
Weighted Average Remaining Contractual Term, Outstanding	5 years 1 month 6 days	5 years 2 months 12 days
Weighted Average Remaining Contractual Term, Exercised During Period	4 years 4 months 24 days
Weighted Average Remaining Contractual Term, Forfeited During Period	6 months
Weighted Average Remaining Contractual Term, Exercisable at End of Period	4 years 8 months 12 days
Aggregate Intrinsic Value, Outstanding, beginning of period	$ 363
Aggregate Intrinsic Value, Granted in Period	0
Aggregate Intrinsic Value, Exercised in Period	143
Aggregate Intrinsic Value, Forfeited in Period	444
Aggregate Intrinsic Value, Outstanding, end of period	237	$ 363
Aggregate Intrinsic Value, Exercisable at end of period	$ 237