Non-Qualified Retirement, Savings And Investment Plans (Details) (USD $)	12 Months Ended
	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011	Dec. 31, 2010
Schedule of Deferred Compensation Arrangement with Individual, Excluding Share-based Payments and Postretirement Benefits
Number of non-qualified retirement savings and investment plans	2
Investments, employee benefit plans, at fair value	$ 400,000	$ 3,486,000
Executive Deferred Compensation Plan [Member]
Schedule of Deferred Compensation Arrangement with Individual, Excluding Share-based Payments and Postretirement Benefits
Basis points				0.0300
Deferred Compensation Liability, Current and Noncurrent	11,300,000	11,700,000
Compensation expense	900,000	800,000	800,000
Defined Benefit Plan, Fair Value of Plan Assets	4,100,000	6,000,000
Investments, employee benefit plans, at fair value	400,000
Trading Securities, Realized Gain (Loss)	(300,000)	(1,200,000)	100,000
Common stock held by non-qualified plan	200,000	100,000
Non-Qualified Plan [Member]
Schedule of Deferred Compensation Arrangement with Individual, Excluding Share-based Payments and Postretirement Benefits
Deferred Compensation Liability, Current and Noncurrent	13,700,000	11,200,000
Defined Benefit Plan, Fair Value of Plan Assets	12,300,000	10,200,000
Increase (Decrease) in Deferred Compensation	1,700,000	700,000	(500,000)
Trading Securities, Realized Gain (Loss)	(1,300,000)	(800,000)	500,000
Common stock held by non-qualified plan	$ 1,400,000	$ 1,000,000