Employee Benefit Plans Defined Benefit Plans Assumptions (Details) (USD $) In Thousands, unless otherwise specified	12 Months Ended
	Dec. 31, 2013		Dec. 31, 2012		Dec. 31, 2011
Defined Benefit Plan, Weighted Average Assumptions Used in Calculating Net Periodic Benefit Cost [Abstract]
Defined Benefit Plan, Assumptions Used Calculating Net Periodic Benefit Cost, Weighted Average Expected Long-term Return on Assets	7.25%		7.25%
Defined Benefit Plan, Effect of One-Percentage Point Change in Assumed Health Care Cost Trend Rates [Abstract]
Defined Benefit Plan, Effect of One Percentage Point Increase on Service and Interest Cost Components	$ 9
Defined Benefit Plan, Effect of One Percentage Point Increase on Accumulated Postretirement Benefit Obligation	179
Defined Benefit Plan, Effect of One Percentage Point Decrease on Service and Interest Cost Components	(9)
Defined Benefit Plan, Effect of One Percentage Point Decrease on Accumulated Postretirement Benefit Obligation	$ (165)
Pension Plan, Defined Benefit [Member]
Defined Benefit Plan, Weighted Average Assumptions Used in Calculating Benefit Obligation [Abstract]
Defined Benefit Plan, Assumptions Used Calculating Benefit Obligation, Weighted Average Discount Rate	5.10%		4.35%		4.65%
Defined Benefit Plan, Assumptions Used Calculating Benefit Obligation, Weighted Average Rate of Compensation Levels	3.86%		3.91%		3.67%
Defined Benefit Plan, Weighted Average Assumptions Used in Calculating Net Periodic Benefit Cost [Abstract]
Defined Benefit Plan, Assumptions Used Calculating Net Periodic Benefit Cost, Weighed Average Discount Rate	4.35%		4.65%		5.50%
Defined Benefit Plan, Assumptions Used Calculating Net Periodic Benefit Cost, Weighted Average Expected Long-term Return on Assets	7.25%	[1]	7.25%	[1]	7.75%	[1]
Defined Benefit Plan, Assumptions Used Calculating Net Periodic Benefit Cost, Weighted Average Rate of Compensation Levels	3.91%		3.67%		3.70%
Defined Benefit Plan Assumptions Used In Calculating Net Periodic Benefit Cost Expected Rate of Return On Assets For Next Fiscal Year	6.75%
Supplemental Employee Retirement Plans, Defined Benefit [Member]
Defined Benefit Plan, Weighted Average Assumptions Used in Calculating Benefit Obligation [Abstract]
Defined Benefit Plan, Assumptions Used Calculating Benefit Obligation, Weighted Average Discount Rate	4.68%		4.25%		4.70%
Defined Benefit Plan, Weighted Average Assumptions Used in Calculating Net Periodic Benefit Cost [Abstract]
Defined Benefit Plan, Assumptions Used Calculating Net Periodic Benefit Cost, Weighed Average Discount Rate	3.88%		4.70%		5.00%
Other Postretirement Benefit Plans, Defined Benefit [Member]
Defined Benefit Plan, Weighted Average Assumptions Used in Calculating Benefit Obligation [Abstract]
Defined Benefit Plan, Assumptions Used Calculating Benefit Obligation, Weighted Average Discount Rate	4.45%		3.65%		4.35%
Defined Benefit Plan, Weighted Average Assumptions Used in Calculating Net Periodic Benefit Cost [Abstract]
Defined Benefit Plan, Assumptions Used Calculating Net Periodic Benefit Cost, Weighed Average Discount Rate	3.65%		4.35%		5.00%
Age, Lower Than Retirement [Member]
Defined Benefit Plan, Assumed Health Care Cost Trend Rates [Abstract]
Defined Benefit Plan, Health Care Cost Trend Rate Assumed for Next Fiscal Year	7.50%		7.75%
Defined Benefit Plan, Ultimate Health Care Cost Trend Rate	4.50%		4.50%
Defined Benefit Plan, Year that Rate Reaches Ultimate Trend Rate	2027
Age, Greater Than Retirement [Member]
Defined Benefit Plan, Assumed Health Care Cost Trend Rates [Abstract]
Defined Benefit Plan, Health Care Cost Trend Rate Assumed for Next Fiscal Year	6.25%		6.50%
Defined Benefit Plan, Ultimate Health Care Cost Trend Rate	4.50%		4.50%
Defined Benefit Plan, Year that Rate Reaches Ultimate Trend Rate	2026

[1] *The expected rate of return on plan assets is 6.75% for the calculation of the 2014 net periodic pension cost.