Benefit Plans (Narrative) (Details) - USD ($)	12 Months Ended
	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Defined Benefit pension plan requisite service period, in years	1 year
Age of eligibility for noncontributory defined benefit pension plan	21 years
Change in mortality assumption, increase to accumulated benefit obligation	$ 100,000
Highest consecutive years of average-compensation (years)	5 years
Defined benefit pension plan, years of service	10 years
Share-based Compensation Arrangement by Share-based Payment Award, Options, Exercises in Period	99,086	24,906
Asset allocation, percent	100.00%	100.00%
Benefit Obligation, Remaining Liability	$ 6,583,000	$ 6,783,000	$ 6,250,000
Benefits paid	281,000	378,000
Unvested stock amortization	$ 342,000	$ 267,000
Bonds And Cash [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Asset allocation, percent	44.90%
Equity Securities [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Asset allocation, percent	55.10%	57.80%
Maximum [Member] | Bonds And Cash [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Target asset, percent	60%
Maximum [Member] | Equity Securities [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Target asset, percent	50%
Minimum [Member] | Bonds And Cash [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Target asset, percent	50%
Minimum [Member] | Equity Securities [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Target asset, percent	40%
Profit Sharing Plan [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Compensation expense	$ 262,000	$ 246,000
Percent of eligible participant's W-2 wages	3.00%
The Replacement Plan [Member] | Chief Executive Officer [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Age of eligibility for noncontributory defined benefit pension plan	65 years
Projected annual after-tax payments	$ 35,000
Projected death benefit payments	750,000
Monthly benefit paid	3,658
Benefit Obligation, Remaining Liability	739,000	739,000
Benefits paid	$ 54,000	53,000
Supplemental Employee Retirement Plan [Member] | Chairman And CEO [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Age of eligibility for noncontributory defined benefit pension plan	70 years
Supplemental Employee Retirement Plan [Member] | Chairman And CEO [Member] | First Quarter of 2016 [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Benefit Obligation, Remaining Liability	$ 1,300,000
United States Postretirement Benefit Plan of US Entity [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Defined Benefit pension plan requisite service period, in years	40 years
Age of eligibility for noncontributory defined benefit pension plan	65 years
Percent of pension for eligible retired employees	1.50%
Incentive Equity And Deferred Compensation Plan [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Maximum number of shares	243,101
Shares available for future grants	91,169
Restrictions on resale of shares	1 year
Unvested stock amortization	$ 342,000	$ 216,000
Cost Not yet Recognized	$ 1,200,000
Cost Not yet Recognized, Period for Recognition	2 years 6 months 4 days
Incentive Equity And Deferred Compensation Plan [Member] | Maximum [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Vesting period	4 years
Incentive Equity And Deferred Compensation Plan [Member] | Minimum [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Vesting period	3 years
Prior Pension Plan [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Defined Benefit pension plan requisite service period, in years	1 year
Age of eligibility for noncontributory defined benefit pension plan	25 years
Employee Stock Option [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Increase (Decrease) in shares outstanding	16,391
Maximum number of shares	793,368
Shares available for future grants	354,090	354,090
Cash equivalent shares used to pay federal withholding tax	6,533
Share-based Compensation Expense	$ 0	$ 51,000
Restricted Stock [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Number of shares vested	24,000
Shares awarded from cashless exercises that increased shares outstanding	13,048
Cash equivalent of shares used to pay all applicable taxes	10,952