Employee Benefit Plans (Narrative) (Details) (USD $)	12 Months Ended
	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]
Defined Contribution Plan, Cost Recognized	$ 3,800,000	$ 3,000,000	$ 2,700,000
Other Deferred Compensation Arrangements, Liability, Current and Noncurrent	1,900,000	2,300,000
Present Value Of Future Salary Contribution Plan Benefits	19,000,000	19,500,000
Postemployment Benefits, Period Expense	849,000	2,500,000	1,800,000
Deferred Compensation Cash-based Arrangements, Liability, Current and Noncurrent	3,900,000	2,900,000
Cash Surrender Value of Life Insurance	96,900,000	93,800,000
Other Postretirement Defined Benefit Plan, Liabilities	1,800,000	1,900,000
Supplemental Employee Retirement Plans, Defined Benefit [Member]
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]
Defined Benefit Plan, Contributions by Employer	123,000	116,000	96,000
Other Deferred Compensation Arrangements, Liability, Current and Noncurrent	678,000	566,000
Pension and Other Postretirement Defined Benefit Plans, Liabilities	$ 2,100,000	$ 1,100,000
Supplemental Retirement And Deferred Compensation Plans [Member]
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]
Percentage Of Deferred Salary	50.00%