Benefit Plans (Narrative) (Details) (USD $)	1 Months Ended	12 Months Ended
	Dec. 31, 2012	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011
Defined Benefit Plan Disclosure [Line Items]
Term of service completed before eligible for coverage		1 year 1000 hours
Employer matching contributions to the plan		100.00%
Maximum percentage of employee eligible compensation the employee may contribute to the plan		4.00%
Additional employer matching contributions of participant's deferral		50.00%
Maximum additional annual contributions per employee deferral percent		2.00%
Percent of discretionary profit sharing contribution		100.00%
Maximum discretionary profit sharing percent of eligible compensation		2.00%
Additional annual contribution period for 401(k) plan, years		10 years
Related plan expense		$ 442,000	$ 425,000	$ 394,000
Additional contribution to plan	6,000,000
Pension expense		560,000	1,073,000	705,000
Defined Benefit Plan, General Guidelines Plan Asset Allocations		5.00%
Change in expected long-term rate of return		7.00%
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%
Non-Qualified Plan [Member]
Defined Benefit Plan Disclosure [Line Items]
Maximum percentage of employee eligible compensation the employee may contribute to the plan		9.00%
Minimum additional annual contributions per employee deferral percent		1.00%
Related plan expense		$ 30,000	$ 42,000	$ 42,000