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Income Taxes (Details)	3 Months Ended		12 Months Ended
Income Taxes (Details)	Dec. 31, 2012	Dec. 31, 2011	Dec. 31, 2012	Dec. 31, 2011	Dec. 31, 2010
Reconciles the statutory federal income tax rate to the Company' s effective tax rate
Statutory federal income tax rate			35.00%	35.00%	35.00%
Increases (decreases) resulting from:
Disallowed meals & entertainment			0.60%	0.60%	0.30%
Disallowed compensation			3.20%	2.30%	1.30%
State income tax, net of federal tax benefit			3.60%	3.60%	3.60%
Other, net			(0.10%)	(1.10%)	0.40%
Effective tax rate	52.90%	37.80%	42.30%	40.40%	40.60%

A ratio calculated by dividing the reported amount of income tax expense attributable to continuing operations for the period by GAAP-basis pretax income from continuing operations.

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- Definition

The domestic federal statutory tax rate applicable under enacted tax laws to the Company's pretax income from continuing operations for the period. The "statutory" tax rate is the regular tax rate if there are alternative tax systems.

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