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Income Taxes (Tables)
 3 Months Ended
Mar. 31, 2013
Income Tax Disclosure [Abstract]  
Reconciliation of Statutory Federal Income Tax Rate to Effective Income Tax Rate
The statutory federal income tax rate is reconciled to our effective income tax rate below:

Effective tax rate
Three months ended
  
March 31,
2013

March 31,
2012

Federal rate
35.0
 %
35.0
 %
State and local income taxes, net of federal income tax benefit
1.7

3.1

Tax-exempt income
(3.0
)
(2.1
)
Foreign operations
(5.0
)
(4.4
)
Tax credits
(5.5
)
(2.7
)
Tax litigation
105.6

—

Other - net
0.5

(0.2
)
Effective rate
129.3
 %
28.7
 %