Income Taxes Income Tax Rate Reconciliation (Details)	12 Months Ended
	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011
Income Tax Expense Components [Line Items]
Effective Income Tax Rate Reconciliation, at Federal Statutory Income Tax Rate	35.00%	35.00%	35.00%
Effective Income Tax Rate Reconciliation, Tax Exempt Income	(5.00%)	(5.70%)	(6.90%)
Effective Income Tax Rate Reconciliation, State and Local Income Taxes	5.90%	4.30%	4.80%
Effective Income Tax Rate Reconciliation, Tax Credits	(1.40%)	(1.90%)	(2.30%)
Effective Income Tax Rate Reconciliation, Noncontrolling Interest Income (Expense)	(1.40%)	(1.60%)	(2.20%)
Effective Income Tax Rate Reconciliation, Other Adjustments	(0.50%)	(0.70%)	(0.10%)
Effective Income Tax Rate, Continuing Operations	32.60%	29.40%	28.30%