Income Taxes (Details)	3 Months Ended		9 Months Ended
	Sep. 30, 2012	Sep. 30, 2011	Sep. 30, 2012	Sep. 30, 2011
Reconciliation of effective tax rate and statutory federal income tax rate
Federal statutory income tax rate	35.00%	35.00%	35.00%	35.00%
State income taxes, net of federal tax benefit	6.90%	6.80%	6.60%	6.30%
Tax-exempt interest on municipal obligations	(0.40%)	(0.40%)	(0.50%)	(0.70%)
Increase in cash value of insurance policies	(1.80%)	(1.50%)	(2.00%)	(2.40%)
Other	2.20%	0.10%	0.90%	0.10%
Effective Tax Rate	41.90%	40.00%	40.00%	38.30%