Commitments And Contingencies (Details) (USD $) In Millions, unless otherwise specified	0 Months Ended				1 Months Ended			3 Months Ended		12 Months Ended
	Sep. 09, 2011	Sep. 16, 2011	Apr. 22, 2011	Dec. 03, 2010	Apr. 19, 2011	Dec. 20, 2010	Oct. 31, 2010	Dec. 31, 2011 plaintiffs	Mar. 31, 2011	Dec. 31, 2011 plaintiffs	Dec. 31, 2010	Aug. 12, 2011	Jul. 25, 2011 plaintiffs	Jun. 15, 2011	Jun. 03, 2011	Sep. 27, 2007
Loss Contingencies [Line Items]
Accrual for legal fees and settlements								$ 15.4		$ 15.4	$ 42.7
Initial settlement payment made							40.8
Number of student plaintiffs						3		5		5						36
Pretax charge of estimated loss								6.0			40.8
Disbursement by terms of agreement									40.0
Number of students in class	60		2,330	2,300	60
Number of claims against student lenders										15
Number of opt-out Individuals								242		242		5	46	31	115
Number of opt out individuals who are class members								167		167
Number of improper opt out individuals													42
Opt-out period expiration date			June 20, 2011							June 6, 2011
Additional number of students joining litigation	42	19				11
Administrative expense for an estimate for potential reimbursements of government funds										5.0
Other accrued liability for certain legal or regulatory matters										5
Banks [Member]
Loss Contingencies [Line Items]
Number of student plaintiffs								316		316
Kelly [Member]
Loss Contingencies [Line Items]
Estimated loss related to litigation settlement										$ 0.2
Abrica [Member]
Loss Contingencies [Line Items]
Number of student plaintiffs								373		373
Aguilar [Member]
Loss Contingencies [Line Items]
Number of student plaintiffs								88		88
Alday [Member]
Loss Contingencies [Line Items]
Number of student plaintiffs								73		73
Ackerman [Member]
Loss Contingencies [Line Items]
Number of student plaintiffs								27		27
Arechiga [Member]
Loss Contingencies [Line Items]
Number of student plaintiffs								60		60