Income Taxes (Details 1)	12 Months Ended
	Dec. 31, 2012	Dec. 31, 2011	Dec. 31, 2010
Operating Loss Carryforwards [Line Items]
Federal statutory tax rate	35.00%	35.00%	35.00%
Impairment	0.00%	(23.60%)	0.00%
State income taxes, net of Federal benefit	4.60%	1.70%	4.80%
Change in tax reserve	(3.40%)	(0.50%)	(2.70%)
Increase (decrease) in capital loss valuation allowance	0.00%	0.00%	2.40%
Net change in state valuation allowance	(0.60%)	(0.10%)	(1.10%)
Other	0.90%	0.10%	0.10%
Effective tax rate	36.50%	12.60%	38.50%