Savings and Retirement Plans (Details) (USD $)	12 Months Ended
	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011
Defined Contribution Pension [Member]
Deferred Compensation Arrangement with Individual, Postretirement Benefits [Line Items]
Deferred Compensation Arrangement with Individual, Employer Contribution Per Employee, Matching Percent	50.00%	50.00%	50.00%
Deferred Compensation Arrangement with Individual, Employer Contribution	$ 384,000	$ 427,000	$ 365,000
Non-Qualified Deferred Compensation Plan [Member]
Deferred Compensation Arrangement with Individual, Postretirement Benefits [Line Items]
Deferred Compensation Arrangement with Individual, Recorded Liability	9,200,000	7,200,000
Maximum [Member] | Defined Contribution Pension [Member]
Deferred Compensation Arrangement with Individual, Postretirement Benefits [Line Items]
Defined Contribution Plan, Maximum Annual Contribution Per Employee, Amount	$ 17,500	$ 17,000	$ 16,500
Deferred Compensation Arrangement with Individual, Employer Contribution, Percent Of Eligible Earnings	5.00%	5.00%	5.00%