Benefit Plans (Narrative) (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013
Defined Benefit Plan Disclosure [Line Items]
Related plan expense	$ 606	$ 556	$ 442
Term of service completed before eligible for coverage	1 year 1000 hours
Employer Matching Contribution, Percent of Match	100.00%
Maximum Annual Contributions Per Employee, Percent	4.00%
Additional Employer Matching Contribution Percent Of Deferral Match From Eligible Compensation	50.00%
Maximum Additional Annual Contributions Per Employee Deferral Percent	2.00%
Employer Discretionary Contribution Percent	100.00%
Maximum Discretionary Profit Sharing Percent Of Eligible Compensation	2.00%
Defined Benefit Plan General Guidelines Plan Asset Allocations	5.00%
Fixed Income [Member]
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Target Plan Asset Allocations Range Minimum	60.00%
Defined Benefit Plan, Target Plan Asset Allocations Range Maximum	90.00%
Equities [Member]
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Target Plan Asset Allocations Range Minimum	10.00%
Defined Benefit Plan, Target Plan Asset Allocations Range Maximum	30.00%
Defined Benefit Plan General Guidelines Plan Asset Allocations	25.00%