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Income Tax Reconciliation of effective tax rate (Details)
12 Months Ended
Dec. 31, 2012
Dec. 31, 2011
Dec. 31, 2010
Effective Income Tax Rate, Continuing Operations, Tax Rate Reconciliation [Abstract]      
Statutory Federal rate 35.00% 35.00% 35.00%
Increase (decrease) resulting from:      
State and local taxes, net 2.60% (1.60%) 1.20%
Executive life insurance 0.80% (1.00%) (1.80%)
Fines and penalties 0.10% 0.30% (0.20%)
Meals & entertainment (0.30%) (3.00%) 0.80%
Capital loss carryforward 0.00% 0.00% 3.70%
Deferred tax expense 0.00% 1.00% 1.20%
Change in valuation allowance (76.00%) (1.00%) 4.10%
Change in uncertain tax positions (4.60%) (1.60%) (1.40%)
Provision to return differences 1.00% (0.30%) 1.40%
Other items, net (1.20%) 0.00% (1.40%)
Provision for income taxes (42.60%) 27.80% 42.60%