Income Taxes (Tables)

6 Months Ended

Jun. 30, 2012

Income Taxes [Abstract]

Schedule Of Reconciliation Of The U.S. Federal Statutory Rate To Effective Tax Rate

	For the Three Months Ended June 30,						For the Six Months Ended June 30,
	2012			2011			2012			2011
U.S. federal statutory rate		35.0	%		35.0	%		35.0	%		35.0	%
State income taxes		2.6	%		2.6	%		1.6	%		2.2	%
Changes in reserve for uncertain tax positions as a result of settlements and lapsed statutes and related interest		-0.6	%		-0.6	%		-0.4	%		-0.8	%
Other		-0.5	%		-0.5	%		0.2	%		-0.2	%
Effective tax rate		36.5	%		36.5	%		36.4	%		36.2	%